Bulletin G od sique

Bulletin G6od6sique (1994) 68:236-252

© Springer-Vertag1994

lAG Newsletter Pascal Willis IAG Central Bureau, 2, AvenuePasteur, BP 68, 94160 Saint-Mand6, France

This part of the Bulletin G6od6sique is under the editorial responsibility of the IAG Central Bureau chaired by the IAG General Secretary. It will include, in each issue, sew,-'raltopics : Informations. Reports of IAG symposia. Reports by National Correspondents. Reports from IAG Special Study Group. Symposia announcements. Book reviews. Fast bibliography.

Informations In M e m o r i a m Richard J. Anderle (1926-1994)

It is the intent of the IAG to extend the services provided by its Central Bureau. An up-to-date information medium is one of the key elements. The LAG Newsletter, included as appendix of the Bulletin G6od6sique, should play this role, and therefore considered as an open forum. Contributors are welcomed to send any information or document which may be of interest for this purpose. This should complement the informations already sent by the IAG officials or the IAG symposia organizers (reports and anouncements). Books to be reviewed are under the responsibility of: Prof. Gtinter W. HEIN Institute of Geodesy and Navigation (IfEN) University FAF Munich D-85577 Neubiberg Germany

Richard J. Anderle died on January 28, 1994, at age 68 while hospitalized near his home in Valley Forge, Pennsylvania. He served as Secretary of the Space Techniques Section of the IAG from 1979 to 1983 and as President of the Section on Advanced Space Technology from 1983 to 1987. Born on October 8, 1926, in New York, New York, he received his BA in mathematics from Brooklyn College in 1948 and pursued graduate studies in mathematics and physics at American University where he also taught as a lecturer

237 in 1964 and 1965. Dick, as he was known to everyone, had a profound impact on the evolution of the field of satellite geodesy during his career with the Department of the Navy at what is today the Naval Surface Warfare Center in Dahlgren, Virginia. Both as a researcher and as a leader on programs of critical importance to his nation, Dick Anderle was exemplified by his sense of values, insight into issues of key technical importance, his ability to readily solve technical and management problems and by his sense of humor. Reflecting back on his career to a period in the late 1950's when the space age began, one acquires a sense of the impact that Dick had on the evolution of satellite geodesy. His research and developments from the 1960's into the 1980's led to his recognition as one of the country's outstanding contributors to the field. He was the undisputed leader in developing and utilizing satellite Doppler techniques for the determination of geopotential models and for global geodetic positioning. He pioneered the application of Doppler data for the determination of polar motion, enabling for the first time the ability to acquire short-term estimates of this fundamental geophysical quantity, and demonstrated the utility of satellite positioning for long-term monitonng of crustal dynamics. The advancement of a global geodetic reference frame for mapping and geodesy was realized through Doppler satellite tracking in a series of World Geodetic Systems and Doppler reference frames in which Dick played a key role. These scientific advances evolved out of ever increasing requirements to improve the accuracy of satellite orbit determination and orbit prediction in support of space surveillance, satellite navigation, and mapping. Dick Anderle's initial work in exterior ballistics supported by data analysis on the first generation of electronic computers led to the application of such techniques to satellite trajectory estimation and prediction in the late 1950's. This eventually furnished the capability to estimate highly accurate orbits for many geodetic and navigation satellite missions. Dick Anderle devoted much of his personal time to supporting the International Association of Geodesy and the American Geophysical Union, where he served on numerous scientific advisory committees and held several offices. He was elected an AGU Fellow in 1981, served as President of the Geodesy Section during 1980 1982 and was a Life Supporting Member. Dick was also active within the International Astronomical Union and the Committee on Space Research (COSPAR). Dick Anderle received numerous awards and recognition for his work. He was the recipient of the Navy's Superior Civilian Service Award for developments in space surveillance in 1961 and the Admiral John A. Dahlgren Award for achievement in science and engineering in 1978. In 1981 he received an honorary Doctor of Science degree from The Ohio State University in recognition of his singular contributions to satellite geodesy. In 1984, Dick was conferred the honorary title of "corresponding astronomer" by the Royal Observatory of Belgium. After his retirement from federal service at the end of 1984, Dick continued his research activities in precision

orbit determination with General Electric in Valley Forge where his work included improvements in gravity field error representation. Dick will be long remembered by his colleagues at work and in the international community as both an outstanding scientist and a congenial and honorable friend. This article was submitted by Patrick J. Fell, Bernard Chovitz, Richard H. Rapp and Bruce Douglas who are among the many who were touched by the person and work of Richard J. Anderle.

In M e m o r i a m Wolf Helmut

(1910-1994)

Professor Dr.-Ing. Dr. b.c. mult. Helmut Wolf passed away on 6th June 1994 at the age of 84. With his death the German and international geodesy has lost one of its "spiritus rectors". Helmut Wolf was born in Werdau, Saxony, in 1910. On leaving school in 1929, he took up the study of geodesy at the Dresden College of Advanced Technology, attaining his diploma in 1993. There followed a year as assistant professor at Dresden College under Paul Werkmeister and then Helmut Wolf joined the Reichsamt ffir Landesanfnahme in Berlin, where he was employed in First Order Triangulation. During this period he wrote his doctoral thesis on adjustment theory, which was accepted by the Dresden College of Advanced Technology for his doctoral degree (Dr.-Ing.) in 1936. Adjustment Theory, especially for large continental astro-geodetic networks, remained Helmut Wolfs main field of interest for the rest of his life. He passed the civil service examination in Berlin in 1937 and became Vermessungsassessor. Between 19421944, Helmut Wolf served in the army, first as infantryman on the front-line, then as a member of a

238 surveying unit. In 1944, he was freed from military service and conscripted to the University of Grttingen for research in the field of vibration and gyroscope measurements. He also studied physics and mathematics, especially applied mathematics. In 1945, Helmut Wolf, now promoted to Oberregierungsrat, joined to the Institut ftir Erdmessung in Bamberg, later to become the Institut ftir Angewandte Geod~isie (IfAG) at Frankfurt-on-Main. Here he took charge of the scientific leadership of establishing the Central European Network (CEN). The result of this work, the European Datum 1950 (ED50), found widespread international acceptance and respect. From 1949 on, Helmut Wolf lectured at the Bamberg Philosophical-Theological College, at the Karlsruhe College of Advanced Technology and at the University of Frankfurt-on-Main. In 1954 he was offered a chair at the Technical University of Berlin, and shortly afterwords at the Bonn University. Since the scope of work at Bonn was more comprehensive, Helmut Wolf chose Bonn, where he supervised teaching and research in the fields of adjustment, land surveying and global geodesy.

European Datum 1987 (ED87). The use of the Helmert blocking method also known as Helmert-Wolf blocking method in this period was his suggestion. Similarily, the combination of terrestrial and satellite data was essentially a result of Helmut Wolf's proposals. In 1993, he composed his last scientific paper devoted to the life and work of Robert Friedrich Helmert (1843 1912), whom he admired and to whom he often refered. Helmut Wolf was not only an outstanding geodesist, but also a great personality of extraordinary charisma, warmth and kindness, admired by peers, colleagues and students alike. We will preserve Helmut Wolf in treasured and honourable memory. Rudolf Sigl

In Memoriam Whitten Charles Arthur (1909-1994)

In 1955, Helmut Wolf was appointed to a chair of theoretical geodesy and to the directorship of the new institute for theoretical geodesy. He enlarged this institute systematically and it became a blueprint for the establishment of similar institutes at other universities. At Bonn, Helmut Wolf was extraordinary successful with his work. He supervised more than 60 doctoral and post doctoral theses and participated in many research projects. Up until 1993, he wrote more than 270 scientific papers and three books. Helmut Wolf was also a member of numerous scientific corporations, such as the German Geodetic Commission, the Sonderforschungsbereich 78 for Satellite Geodesy of Munich University, the Permanent Commission for the Readjustment of the European Triangulations (RETrig), and several Special Study Groups of the International Association of Geodesy. In 1962, he was offered a chair at the College of Advanced Technology in Aachen and in 1963, at the IfAG in Frankfurt. He declined both offers. Helmut Wolf received many awards: The Bavarian Academy of Sciences elected him as corresponding fellow in 1968. In 1975 he was honored by the Golden Helmert Medal of the German Association of Surveyors (DVW), in 1972 he was elected as fellow of the Scientific Association of Braunschweig and, in 1978, as corresponding fellow of the Austrian Academy of Sciences. Four foreign universities awarded him an honory doctor degree: the ETH Zurich in 1970, the University of Uppsala in 1976, the University of Zagreb in 1981 and the University of Yildis in 1993. After his retirement in 1978, his main work concerned the RETrig. This led in 1989, to the

Charles Whitten, one of the most respected and beloved figures of the international geodetic community, died on July 12, 1994 at the age of 84. Favored with excellent health throughout his life, he was struck down by a virulent cancer contracted suddenly in January of this year. He is survived by his wife, Brena, three sons, and five grandchildren. He will be remembered with affection by a host of friends and colleagues, who will find it difficult to comprehend his absence at geodetic gatherings where he played such a prominent role for many years. For other half a century, Whitten towered over the geodetic scene. After entering the U.S. Coast and Geodetic Survey in 1930 upon his graduation from

239 Carthage College, he enjoyed a long, unbroken career there encompassing all phases of geodesy including field work, numerical computation and data reduction, geodetic research, and, above all, fruitfull interchange with the allied fields of seismology and geomagnetism. He was chief Geodesist when he retired in 1972. He represented the final link of the tetrad of successive renowned geodesists at C&GS: Hayford, Bowie, Lambert, and Whitten, the last three of whom also served with distinction as Presidents of the International Association of Geodesy. Whitten's specific scientific achievements were concentrated mainly in two areas: applying modern computing techniques to geodetic adjustments, and research in crustal movements. His work in adjustment of triangulation is exemplified by the publication in 1951 of the results of a comprehensive unified adjustment for western Europe. In the area of crustal movements, his geodetic training and skills enabled him to precisely quantify the results needed by seismologists and tectonophysieists for modelling dynamical phenomena. Among many innovations employed by him, were the analysis of angular as well as positional distortion, and the application of a 4-dimensionnal (including time) mathematical model. One of Whitten's many honors was the highest award of the American Geophysical Union: The Bowie Medal for "unselfish cooperation in research". No one ever satisfied this requirement better than Charles Whitten. He has been undoubtly the best known U.S. geodesist, both in his own country and internationally. Only someone willing to cooperate, to understand the other person's point of view, and to work long hours in tasks unrelated to personal benefit could build up such a splendid reputation. He encouraged subordonates to engage in independent work, and he initiated a program of post-graduate university training. He took an active interest in and stimulated new directions, like the use of artificial satellites for geodesy, both in in his own agency and in international cooperative ventures. Whitten's colleagues expressed their appreciation for his character and talents by appointing him to numerous offices. He served as General Secretary of the American Geophysical Union from 1967 to 1974, and President of its Section of Geodesy (19641968). He was also prominent in the American Congress of Surveying and Mapping, the Society of American Military Engineers, the American Association for the Advancement of Science, and the Washington Academy of Science. He was a participant in many U.S. National Academy review panels, including the Committee on Polar Research, the Alaskan Earthquake Committee. the Committee on Geodesy, and the Geophysics Research Board. He enjoyed very much his membership in the Cosmos Club of Washington, D.C. But his most prominent positions were conferred internationally. Within the International of Geodesy, he

served as President of the Section of Triangulation from 1954 to 1960, and was then elected President of the IAG through 1963. Afterwards, he aplied his energies to the International Union of Geodesy and Geophysics Finance Committee, where he was a fixture for many years, first as Secretary, then as President. However, Whitten's devotion to the IAG did not flag. He remained heavily involved in its affairs into this decade, serving on almost every nominating committee for the past 30 years, and providing counsel to many other committees, commissions and study groups of IAG. In addition to the Bowie Medal awarded in 1980, the American Geophysical Union bestowed an almost unprecedented honor on named after him "for outstanding achievement in research on the form and dynamics of the Earth and planets". Naturally, he was the first recipient. He was chosen as one of the original Fellows of the American Geophysical Union in 1962. His agency, C&GS, rewarded him with its highest prize, the Department of Commerce Gold Medal, in 1972. He achieved three honorary degrees: a Doctor of Engineering from the University of Karlsruhe, a Doctor of Science from his alma mater, Carthage College, and a Doctor of Science from the University of New Brunswick. At the IUGG Genarl Assembly in 1979 at Canberra, the IAG instituted a new award, the Levallois Medal, to honor noteworthy contributors to the Association for service and accomplishements which foster internatioal cooperation and understanding. The selection of Whitten as the first designee was anticlimactic. Another choice might have provoked an international incident. His departure now from the geodetic scene leaves an unfillable void. Bernard Chovitz

In M e m o r i a m Georges L a c l a v b r e (1905-1994) Mr. Georges Laclavrre, former General Director of the Institut Gdographique National, France and Honorary Secretary General of the International Union of Geodesy and Geophysics, died on the 26th of September 1994 at age 89. The IAG Central Bureau expresses its deepest sympathy to his family. His obituary will be published in the next IAG Newsletter.

240

CALL FOR NOMINATION CONCERNING THE IAG OFFICERS 1995-1999 To:

National Committees of the IAG; Current Officers of the IAG (Presidents of Special Study Groups, Commissions, Special Commissions, and Sections. Section Secretaries and members of the Bureau); Fellows of the IAG

Secretary General Presidents of Sections I-V (for designations please see the Geodesist's Handbook (Bul. Geod. Vol. 66, N ° 2, 1992) Presidents of Commissions III, V, VII, VIII, IX, X, XI, and XII Secretaries of Sections : One each for Sections I, II, III and V, two for Sections IV. Presidents of Special Commissions 1-6 Assistant Secretaries (2) Thus a total of 31 nominations are needed.

From :

IAG Nominating Committee for 1995-1999 J.Y. Chen Ivan I. Mueller (Chairman) P.J.G. Teunissen H.G. Wenzel Subject : Call for Nominations The Nominating Committee requests your cooperation in preparing a list of nominations for office-bearers of the Association for the four-year period 1995-1999. The list below shows the IAG's offices for which nominations are requested. A second list indicates current office bearers who are N O T eligible for nomination for certain offices. The Nominating Committee will welcome your advice on the nominations. Suggestions on who to nominate should reach the Chairman of Nominating Committee at the earliest and not later than January 31, 1995 at the following address : Ivan I. Mueller, Department of Geodetic Science and Surveying, The Ohio State University, 1958 Neil Ave, Columbus, Ohio, 43210, USA. Fax : 1-614-292 2957. E-mail : MUELLER @MPS. OHIO- STATE.EDU. Elections will be held during the General Assembly in Boulder, Colorado, in July 1995, where participants will be informed on the Committee's nominations on the first day of the Assembly. There will be a further opportunity to make nominations during the first two days of the Assembly, in accordance to lAG By Laws. The procedure will be that elections will be held by the Council on the basis of nominations from the Committee and any further nominations received at the Assembly.

LIST OF OFFICES FOR WHICH NOMINATIONS ARE REQUESTED : President Vice President 2nd Vice President

Current office holders are also listed in the Geodesist's Handbook. The following officers are NOT eligible for re-election FOR THE OFFICES listed : W. Torge, President K.P. Schwarz, Vice President J.Y. Chen, 2nd Vice President M. Prilepin, President Section I C. Reigber, President Section II H.G. Wenzel, President Section III F. Sans6, President Section IV J. O. Dickey, President Section V H. Hsu, President Com. V B. Schutz, President Com. VIII K. Poder, President Com. X F.K. Brnnner, Secretary Section I P. Holota, Secretary Section IV J.O Dickey, IAG Assistant Secretary

Bulletin G6od6sique / Manuscripta Geodeticae Information Minute of meeting held in Paris on 27 of March, 1994 present: C.C. Tscherning, Editor-in-Chief, BG/mg (CCT) Petr Vanicek, Editor-in-Chief, MG/mg (PV) Wolfgang Engel, Springer-Verlag (WE) Henriette Hansen, Secretary (HEH) the agenda was agreed to be as follows: 1) General discussion on the following items: a) Billing of subscribers b) Complains about the distribution of the journal c) Status on subscriptions d) Status on manuscripts for both journals e) Preparations for the election of board for MG/BG 2) Merging of MG and BG la) WE gave a short report status on the problems about the billing of the subscribers, which is due to the variation in the type of subscriptions. WE confirmed, that all subscribers have been informed about the wrong 1994 personnal rates, but he also suggested that some information should be given in the next Newsletter. Furthermore WE added that, if the two journals merge,

241 then a fixed price on both journals would be more satisfactory.

the journals. However, the new policy with renewed proceedings should solve this problem.

PV mentionned that he had recently received a letter concerning problems about the distribution of MG/BG in Australia. Among other things, the letter blamed Springer-Verlag for not being "well-prepared" enough for customers. Also the letter stated, that researchers are not acquainted with the two journals in Australia.

le) An announcement for the nominations to the election for the board has to be made. A note should be made in both journals. The decision about wether there should be one or two editors-in-chiefs will be taken after the disussion about the merging of the two journals.

PV suggested that it might be an idea to send free inspection copies to potential customers in Australia. Furthermore PV said that everybody who is active in geodesy ought to subscribe, they just have to contact the national representative to get information. A short discussion on advertising followed and it was agreed that in future advertisements there ought to be a sentence saying something about wether the person is an IAG associate or otherwise, how to become it. WE will have the sentence changed. lb) There have been several problems about irregular mailing of the journals, especially in the U.S., which is due to the postal service and in Canada due to problems with taxes. Springer-Verlag is fully informed about the problems and will solve them as quickly as possible. lc) Springer presented the number of subscribers on both journals (end 1993): BG: 436 and MG: 293, of this approximately 150 are financed by IAG. BG has "lost" 80 subscribers compared to 1992. MG has "lost" 10. In WE's opinion, BG/MG need to increase the efforts on promotion, especially to the personnal subscribers. PV said, that Japan maybe is a potential market, even though they maybe have their own journal. Special promotion could be made in Japan, maybe with help from Nakagawa. It was agreed that HEH should send Nakagawa's address to WE. ld) From the moment a manuscript is accepted to its publication, there is a 6-13 months waiting time (this applies for both journals and is of course not acceptable). (6 months on BG and 12-13 months on MG). Something has to be done as quick as possible. Suggestion from WE: For 1994 publishing 8 issues (instead of 6) for MG and 6 issues (instead of 4) for BG, and increasing the number of pages for 1995, Futhermore it was agreed that, both editors should send information about the status of camera-ready manuscripts to Ulrike Butz, Springer-Verlag. It was discussed whether the publication of the IAG proceedings would cause fewer papers to be submitted to

2) Everyone present supported the idea of a joined MG/BG journal. A couple of suggestions for the new journal were made: - a proposal for a new name was "Bulletin of Geodesy" - it could be separated in two main parts, and newsletter, announcement and so forth should be placed in separate sections. - the contract between Springer and IAG has to be modified. WE will investigate and prepare this. A group with WE, CCT and an IAG representative should prepare a draft contract as soon as possible. - when the negociations between IAG and Springer are successful, a letter of intent should be published in BG/MG Furthermore it was agreed that a status report on the above discussed items should be published in both journals. PV writes it. It was agreed to present the idea of a merged BG/MG for the IAG committee at the meeting on Monday 28 th. P. Vanicek

Geodetic

Bibliography

The Bolletino di Geodesia has issued a new book which is the Author Index of all papers appeared in the Journal between 1941 and 1991 .This book is distributed for free to subscribers or upon request to Istituto Geografico Militare Italiano, Editor of the Bulletino. This publication will be followed in the future by a second volume with the paper index organized by subjects. For further information, please contact : Prof. Fernando Sansb Politecnico di Milano Ambientale e del Rivelamento Piazza Leonardo da Vinci 1-20133 Milano Italy Phone : (39)-2-2399-6504 Fax: (39)-2-2399-6530 E-mail : GEOPOLI @IMICLVX.B ITNET

242

International GPS Service for Geodynamics (IGS) : News update The IGS, a service established by the International Association of Geodesy (IAG), offically started its activities on January 1, 1994, after a successful pilot phase of more than one year. The IGS is based on about 40 globally distributed permanent GPS tracking sites, three Global Data Centers, five operational or Regional Data Centers, seven Analysis Centers, and a Central Bureau. Some fifty institutions and organizations contribute to these activities. The IGS routinely provides : - H i g h - q u a l i t y orbits for all GPS satellites (estimated accuracy better than 20 cm), - Earth Rotation Parameters - Contributions to the determination of the tracking site coordinates in the International Terrestrial Reference Frame (ITRF), in cooperation with the International Earth Rotation Service (IERS) - P h a s e and Pseudorange observations in daily RINEX files for each IGS site The tracking data are available at various Data Centers, the individual orbits determined by the Analysis Centers at the Global Data Centers, and the combined official IGS orbits at the Central Bureau and the Global Data Centers (see below). The Central Bureau, located at the Jet Propulsion Laboratory in Pasadena, USA, maintains an IGS Information System (CBIS) accessible through: - I n t e r n e t (anonymous ftp, igscb.jpl.nasa.gov, directory/igscb) - World Wide Web (URL is http://igscb.jpl.nasa.gov/, using e.g. NCSA Mosaic or

LYNX) -E-mail ftp server (info available at the Central Bureau) T h e CBIS contains : - information about the availability of tracking data and IGS products, the access to tracking data and IGS products, data file formats, the IGS data and analysis centers, the IGS tracking stations, the current status of the Global Positioning System, - IGS orbits, IERS earth rotation parameters, - mail and e-mail addresses - access software, compress/decompress routines - IGSMAIL and IGS REPORT messages exchanged within the IGS community. Please direct questions to the Central Bureau : E-mail : IGSCB @COBRA.JPL.NASA.GOV Phone : (1)-818-354-8330 Fax : (1)-818-393-6686 G. Beutler, Chairman

R. Neilan, Central Bureau

Symposia announcements ION National Technical Meeting Navigating the 90's : Technology, Applications and Policy Anaheim, USA 18-20 January 1995 Symposium

:

This ION national technical meeting will focus on recent technical developments and innovative applications while also highlighting the evolving national and international policies and regulations which will guide us in the year ahead. Deadlines

for abstracts

:

October 7, 1994 Further

information

can be obtained

from

:

Dr. Penina Axelrad University of Colorado CCAR, CB 431 Boulder CO 80309-431, USA Phone : (1)-303-492-6872 Fax : (1)-303-492-2825

FIG Survey '95 International FIG Symposium Engineering Surveying. Cape Town, South Africa, 7-10 February 1995. Symposium

on

:

The advancement of enginnering surveying and deformation measurement techniques on the African Continent will be the principal aim of the symposium. However, it is hoped that discussions on survey methodologies particular to developing countries will from an important part of the symposium. Deadlines

for abstracts

:

September 1, 1994. Participation

Fees

:

Payment before December i : 950 SAR Payment after December 1 : i100 SAR Further

information

can be obtained

from

:

Prof. Heinz R~ither Dept. of Surveying & Geodetic Engineering University of Cape Town Rondebosch 7700 Phone: (27)-21-650-3573 Fax: (27)-21-650-3726 E-mail: RUTHER @CERECAM.UCT.AC.ZA

243

3 rd International Workshop, High Precision Navigation. Stuttgart, Germany, April 3 - 5, 1995. Second Circular Symposium : The workshop intends to bring together experts in the field of high precision navigation both from university and industry. The workshop will be concerned with sensor integration for navigation, geodesy and surveying under the aspects of "Realtime" and "High Precision". The following application oriented fields should be discussed with respect to hybrid systems, sensor integration of methods used in navigation and geodesy. I.

Kinematic Positioning with INS/GPS for Geodetic Applications; II. Sensor Integration for Airborne Measurements; III. Analysis and Interprestation of Multisensor image Data; IV. Autonomous Vehicule Navigation and Guidance; V. Applications in Engineering. Deadline for abstracts : September 30, 1994. Registration fees : Payment before January 15th, 1995 : Payment after January 15th, 1995 :

DM 300 DM 400

Please transfer the participation fee to : Account No.: t05 461 1700 Baden-Wfirttembergische Bank, Stuttgart Bank Code: 600 200 30 with the note "Titel 11186 BANr.2646 (SFB 228)" Further informations can be obtained from : Gesch~ftsstelle SFB 228 Ulrich Hangleiter Universit~it Stuttgart Pfaffenwaldfing 7A D-70569 Stuttgart Phone : 0711/685-66t5 Fax : 0711/685-6670

XXI th GENERAL ASSEMBLY OF THE INTERNATIONAL UNION OF GEODESY AND GEOPHYSICS (Boulder, USA, July 2-1994) Joint Sponsored Symposia led by IAG Earth Rotation: An Interdisciplinary Approach to Earth System Science (IAG,

IAMAS, SEDI).

IAPSO,

IASPEI,

IAGA,

IAHS,

Convenors: M. Feissel (IAG), Observatoire de Paris, Central Bureau, Int'l Earth Rotation Service, 61, Avenue d'Observatoire, F-75014 Paris, France, 33 - 1-4051-2226 tel.; 33-1-40-51-22-91 FAX; [email protected]; D. Cartwright (IAPSO), 3 Borough House, Petersfield Hampshire, GU32 3LF; Great Britain, 44730-267195 tel; 44-428-683066 FAX; DEC @UNIXA.NERC-WORMLEY.AC.UK; R. Hide (IAMAS, IAGA, SEDI), University of Oxford, Clarendon Lab., Dept. of Physics, c/o NERC Unit, Oceanography Group, Room 1, The Observatory, Parks Road, Oxford OX1 3PU, England, U.K., 44-865272901 tel; 44-865-272923 FAX; R. Sabadini (IASPEI), Universita Degli Studi di Bologna, Settore di Geofisica, Viale Berti Pichat 8, 40127 Bologna, Italy, 39-51-243586 tel; 39-51-250106 FAX; J. Wahr (IAHS), University of Colorado, Physics Dept., Boulder, CO 80309, 303-492-8349 tel; 303-4923352 FAX, [email protected]. General Topics: The modern approach to understanding Earth rotation irregularities deals with interacting physical constituents as diverse as a liquid, magnetic core, a visco-elastic mantle, and liquid and gaseous external layers, each with internal motions and responding to external forces. The global character of the observational evidence is a major challenge to theoreticians who develop dynamical model of the behavior of each layer. No single theory can explain the complete set of observed irregularities. The monitoring of Earth rotation itself includes the participation of worldwide space geodetic and astronomical programs, leading to intensive international cooperation. The symposium will focus on those aspects of Earth rotation studies that imply, or even create, bridges between scientific disciplines. Crustal Deformation Along Plate Boundaries (IAG, IASPEI). Convenor: J-B Minster (IAG, IASPEI) Scripps Institute of Oceanography, University of Calif. at San Diego, Inst. of Geophysics & Planetary Sci., La Jolla, CA 92093, 619-534-5650 tel.; 619-534-2902 FAX; JBMINSTER @UCSD.EDU. General Topics: Over the past two decades, space geodesy has come of age, and has evolved from an experimental discipline to one of the most important tools available to scientists interested in active tectonics. It now permits detailed measurements of tectonic motions over spatial and temporal scales never before accessible to Earth scientists. With the ubiquitous accessibility of inexpensive techniques such as the Global Positioning

244 System (GPS) and with the deployment and operation of precise global international geodetic networks and of dense regional permanent networks, the short-term kinematics of plate boundary deformation zones on continents where the rigid plate paradigm is inadequate can now be elucidated in a global reference frame, and compared with long-term geological interpretations. This opens new exciting possibilities for a new, improved understanding of the geomechanics of this regions. This interdisciplinary symposium invites papers dealing with the geodetic aspects of the problem, including descriptions of novel techniques and special network deployments; with the geophysical aspects, specifically the seismic and volcanic cycles; and with the geodynamical aspects, including in particular rheological and dynamical models of the lithosphere and asthenosphere, as well as fault zone mechanics. Papers dealing with applications of such studies to the characterization and mitigation of natural disasters are especially welcome.

DORIS and PRARE space observations) will be covered in sesssion 1. Airborne and satellite remote sensing methods for acquiring high resolution multi-spectral images and the use of radar interferometry from the ERS-1/2 SAR sensors for mapping small scale topographic changes due to the growth of volcanic domes or the intrusion of magma at shallow depth will be dealt in session 2. Seismic methodologies, aiming at revealing the characteristics and origin of volcanic tremors as well as relationship to volcanic eruptions will be discussed in session 3. Automatic event recording, 3-component seismometry, broad band, and special array techniques are considered to be topics of discussions for this session.

Geodetic, Remote Sensing and Seismic Methods for Monitoring of Volcanic Activities (IAG, IASPEI, IAVCEI).

Convenors: G. Beutler, Astronomical Institute, University of Bern, Sidlerstrasse 5, CH-3012 Bern, Switzerland, 4131-631-8596 tel.; 41-31-631-3869 FAX; [email protected]; G. Hein, Universit/~t der Bundeswehr Mtinchen, Institut ftir Geod/isie, Werner-Heisenberg-Weg 39, D8014, Neubiberg, Germany, 49-89-6004-3435 tel; 4989-6004-3560 FAX; [email protected]; W. Melbourne, Jet Propulsion Laboratory, 4800 Oak Grove Drive, MS 238-540, Pasadena, CA 91109; 818-354-5071 tel; 818-393-6686 FAX; G. Seeber, Universit/it Hannover, Institut fur Erdmessung, Nienburger Strasse 6, D-3000, Hannover, Germany; 49-511-7622475 tel; 49-522-762-4006 FAX.

Convenors: C. Reigber (IAG), GeoForschungsZentrum (GRZ), Dept. of Kinematics and Dynamics of the Earth, Telegrafenberg A17, D-14473 Potsdam, Germany, 49331-288-1100 or 1114 tel.; 49-331-288-1111 FAX; REIGBER @GFZ-POTSDAM.DE; A. Hasegawa, (IASPEI)., Observation Center for Earthquake Prediction, Tohoku University, Aoba-ku, Sendai-shi 980, Japan; tel.: 81-22-223-7087; FAX 8122-264-3292; A. Linde (IAVCEI), Dept. of Terrestrial Magnetism, Carnegie Institution of Washington, 5241 Broad Branch Road, N.W. Washington, D. C. 20015; tel. 202-6864370 ext. 4394; FAX 202-364-8726; LINDE @DTM.CIW.EDU General Topics In order to study the volcano-mantle dynamics and volcano climate connections, the monitoring and analysis of both lava-producing and explosive volcanic eruptions and deposits produced by volcanoes are essential. Terrestrial and space geodetic methods, seismic, as well as aircraft and satellite remote sensing techniques are essential tools to collect data for monitoring and analysis and for the development of early warning systems. Within three sessions, the symposium will concentrate on instrumental and analytical methodologies which help to obtain better understanding of processes before, during and following volcanic eruptions and are used or proposed for volcano monitoring, volcanic eruption prediction, and early warning systems. Terrestrial and space geodetic techniques for monitoring horizontal and vertical displacements (laser distance measurements, gravity-meter, tiltmeter, GPS,

IAG

Symposia

GPS Trends in Precise Terrestrial, Airborne, and Spaceborne Applications (IAG).

General Topics This symposium should reflect the state of the art for all kinds of scientific and engineering applications using the now fully operational Global Positioning System (GPS). It is jointly organized by the IAG and the International Union of Surveying and Mappings (IUSM) working group on GPS. The symposium is structured as follows: Session 1: The International GPS Service for Geodynamics (IGS) and other continuously operating GPS reference networks: their impact on geosciences and engineering. Chairpersons: G. Seeber/L. Hothem. Session 2: Spaceborne Applications of the GPS. Chairpersons: W. G. Melbourne/J. M. Dow. Session 3: Kinematic Applications of the GPS. Chairpersons: G. Hein/B. Remondi. Session 4: The GPS and its relations to geophysics and the other space techniques (such as troposphere, ionosphere, and time transfer). Chairpersons: G. Beufler/Ch. Roecken.

245

Geodesy in Southeast Asia (IAG). Convenors: J. Rais, National Agency for Survey & Mapping, Bakosurtanal, Jalan Raya-Bogor Km 46, PO Box 3546/JK, RI-Cibinong, Indonesia, 62-21-8073067 tel; 62-21-8072064 FAX; J. Manning, University of Canberra, PO Box 1, Belconnen ACT 2616, Australia, 61-6-201-4352 tel.; 61-6-201-4366 FAX, [email protected] General Topics The Symposium objectives are to focus attention on geodetic activity in the Southeast Asian Region research, development and applications promote an exchange of information on geodetic activity within the region, promote national, regional and international dialogue; encourage global and regional collaboration among academic institutions, researchers, governments and practitioners on current and future geodetic activity pertaining to the region; and to present and discuss recent scientific results of interest to the region. Discussion Topics include: High precision techniques applied to geodesy and geodynamics, Absolute gravity, Regional geoids, National geodetic reference frames and networks, Global reference frames - implications for SE Asia, Sea level monitoring, Marine geodesy, Other regional projects Global Gravity Field Variations (IAG).

and

Its

Temporal

Convenors: R. H. Rapp, Dept. of Geodetic Science. Ohio State University, 1958, Nell Ave., Columbus, OH 43210, 614-292-6005 tel.; 614-292-2957 FAX; RHRAPP@OHSTMVSA; A. Cazenave, CNES-GRGS, 18 Ave Edouard Belin, 31055 Toulouse Cedex, France; 33-6133-2922 tel; 336125-3205 FAX; [email protected]; R. S. Nerem, NASA, Goddard Space Flight Center, Code 926, Greenbelt, MD 20771, 301-286-3220 tel; 202-328-0566 FAX; SNEREM@ SANTAFE.GSFC. NASA.GOV. General Topics New satellite and combination models and methods. Gravity information from altimeter observations and surface gravity measurements. Improved representation procedures. Geoid undulation accuracy. Role of GPS tracking data. Future global gravity field mapping missions. Factors limiting accuracy of global models. Role of topography. Temporal changes from satellite and terrestrial (e.g. absolute gravity) measurements. Geophysical inferences of global gravity models and their time variation. IAG Inter-Section Symposia New Concepts in Space Geodesy (IAG).

Convenors: P. L. Bender, University of Colorado, JILA, Box 440, Boulder, CO 80309-0440, 303-492-6793 tel.; 303492-5235 FAX; [email protected]; F. Nouel, CNES/GRGS, 18 Avenue Edouard Belin, F-31055 Toulouse Cedex, France, 33-6127-4067 tel., 33-6128-1855 FAX, NOUEL @MELIES.CNES.FR; C. Reigber, GeoForschungsZentrum (GRZ), Dept. of Kinematics and Dynamics of the Earth, Telegrafenberg A17, D-14473 Potsdam, Germany, 49331-288-1100 or 1114 tel.; 49-331-288-1111 FAX; REIGBER@ GFZ-POTSDAM.DE; R. Rummel, Technische Universitat Mnchen, Inst. of Astro. & Phys. Geodesy, Areisstrasse 21, D-80290, Mnchen, Germany, 49-89-21053190 tel; 49-8921053178 FAX, [email protected]. General Topics: The subject of the Symposium is new techniques or proposed missions for space geodesy which are either under development or have been suggested recently or realized recently. Thus, the topics range from recently launched experiments such as TOPEX/POSEIDON, ERS-1, STELLA, LAGEOS-2 to planned missions such as GFZ-1, ERS-2, ARTISTOTELES, STEP or even GP-B or LISA. Both experience with space borne GPS, DORIS or PRARE should be exchanged as well as ideas on future technology concerning tracking, static or dynamic positioning, attitude, or microaecelerometry. The aim is to provide a total picture of where geodetic space technology currently stands and what the trends most likely will be. Thus, also theorists will discover what problems can and must be addressed in the near future. The Geoid and the Solution of the Boundary Value Problem (IAG). Convenors: B. Heck, Universitat Karlsruhe, Geod~itisches Institut, Englerstrasse 7, PO Box 6980, D-76128 Karlsmhe, Federal Republic of Germany, 49-721-6083674 tel.; 49-721-694-552 FAX; GO04@DKUN!2; R. Forsberg, Kort-og Matrikelstyrelsen, Geodetic Division, Rentemestervej 8, DK-2400 Copenhagen NV, Denmark, 45-3587-5319 tel; 45-3587-5052 FAX; [email protected]; H. Stinkel, Technische Universitat Graz, Dept. of Geodesy and Geoinformatics, Steyrergasse 30, A-8010 Graz, Austria, 43-316-873-6346 tel; 43-316-813-247 FAX; SUNKEL @FTUG.DNET.TU-GRAZ.AC.AT. General Topics: The need for highly precise, high-resolution determination of the geoid/quasi-geoid has strongly increased in recent years, due to the impact of GPSleveling and geophysical/oceanographic demands. This challenge affects nearly any theoretical and practical aspects of the geodetic boundary value problem

246 (GBVP), forming the conceptual basis of geoid/quasigeoid determination. The symposium will focus on: progress in theory of the GBVP on the basis of terrestrial, airborne and space gravity field observations, including overdetermined problems, the role of topography and the use of isostatic models in the framework of the GBVP, modern numerical solution techniques, including spectral approach and finite element/boundary element methods, complementary aspects such as downward continuation and regularization.

Airborne Gravity Field Determination (IAG). Convenors: K.-P. Schwarz, University of Calgary, Dept. of Surveying Engineering, Calgary, Alberta T2N 1N4, Canada, 403-220-7377 tel.; 403-284-1980 FAX; SCHWARZ @ENS U.UCALGARY. CA; J. Brozena, Naval Research Laboratory, Code 7420, 4555 Overlook Ave SW, Washington, DC 20375-5350, 202-767-3013 tel; 202-767-0167 FAX; JOHN @HP8C.NRL.NAVY.MIL; G. Hein, Universit~it der Bundeswehr Mtinchen, Institut ftir Geod~isie, Werner-Heisenberg-Weg 39, D8014, Neubiberg, Germany, 49-89-6004-3435 tel; 4989-6004-3560 FAX; [email protected]. General Topics: The Symposium will address topics of current interest in airborne gravimetry in the following three sessions: Session 1: System Concepts and Critical Design Parameters Session 2: Error Models and Filter Design Session 3: Application Areas, System Tests, and Results Each session will have a length of 1 1/2 hours and will consist of presented and poster papers. Authors are asked to indicate their preference. Abstracts: Abstracts in the prescribed format are to be sent to the Organizing Committee in care of the American Geophysical Union with a copy to the main convenor, K. P. Schwarz. Geodetic Networks for Geophysical Issues (IAG).

Addressing

Convenors: M. Pritepin, Soviet Geophysical Committee, Molodezhnaya 3, SU-117296 Moscow GSP-1, Russia; 7-095-130-0546 tel.; 7-095-930-5509 FAX; [email protected].; Y. Bock, IGPP A-025, Scripps Institute of Oceanography, University of California, San Diego, La Jolla, CA 92093, 619-534-5292 tel; 619-534-9823 FAX; [email protected];

J. Kakkuri, Finnish Geodetic Institute, Ilmalankatu 1A, Hetsinki SF 00240, Finland, 358-0-41033 tel; 3580-414946 FAX, [email protected].

General Topics: Forum to discuss the application of geodetic networks for a variety of geophysical investigations. Areas of particular interest include: (1) campaign-type and continuously operating geodetic networks for the study of plate motion, plate boundary crustal deformation, and earthquake and volcanic hazards, (2) collocation of geodetic sensors within existing geophysical networks, (3) geodetic networks for sea level monitoring, glaciology, subsidence and other vertical motion applications, (4) sensing of atmospheric water vapor with continuous geodetic networks. Results and conceptual papers are especially solicited.

Scientific Meetings by the IAG Sections The IAG Sections will organize their own business and scientific meetings, following the terms of reference published in the Geodesist's Handbook 1992

Section I: Positioning Convenor: M. Prilepin General Topics: Continental networks; integrated geodesy; inertial systems; optical interferometry; sea-floor positioning; vertical reference systems; rapid precise levelling; static Global Positioning System; kinematic Global Positioning System; wet propagation delay. Within Section I, Commission X, Continental Networks (K. Poder) will organize a meeting on SIRGAS (South American Geocentric Reference System Project), jointly with the Pan-American Institute of Geography and History (PAIGH). Special Commission SC4 Applications of Geodesy and Engineering (K. Linkwitz) will organize a joint sessions with the IUSM Working Group on Automated Control Measurement (H.Haggren). Section II: Advanced Space Techniques Convenor: C. Reigber General Topics: International coordination of space techniques for geodesy and geodynamics; Wegener project; gravity field determination by satellite gravity-gradiometry; application of space VLBI in the field of astrometry and geodynamics; non-gravitational force modelling effects on satellite orbits; Spaeeborne GPS/GLONASS; timevarying gravitational effects on satellite orbits; altimetry: optimal processing for geodesy, geophysics and oceanography.

247

Section III: Determination Field Convenor: H. G. Wenzel

of the Gravity

General Topics: International gravity commission; international geoid commission; techniques of precise gravimetry; airborne gravimetry; optimization of spectral gravity field modelling methods; high resolution geoid modelling and evaluation; combined use of gravimetry and stress-strain measurement techniques. Sessions will be arranged as follows: Oral Session 1: Business session, Convenor: Hans-Georg Wenzel Keywords: Report of Section President, Presidents of Commissions, Special Study Groups, International Gravity Bureau, International Geoid Service. Oral Session 2: Gravimetry Convertor: Iginio Marson Keywords: Absolute and relative terrestrial gravity measurements, gravity networks and control stations, non-tidal gravity variations, Oral session 3: Geoid Determination, Convenor: Hans Sfinkel Keywords: global, regional and local geoid determinations from gravimetry, gradiometry, satellite altimetry, geodetic astronomy, satellite altimetry, GPS. Poster session 4: common for both oral sessions 2 and 3. Convenor: Rene Forsberg The scientific sessions 2 and 3 will provide a forum for those presentations which do not fit into a Union, Inter-Association or an IAG Symposium. Section IV: General Theory and Methodology Convenor: F. Sansb General Topics: Mathematical and physical foundations of geodesy~ modelling and quality control for precise integrated navigation; the role of terrain gravity field modelling; tomography of the atmosphere by geodetic measurements; integrated inverse gravity modelling; applications of the boundary value problem techniques to space and airborne gravity field. Section V: Geodynamics Convenors: J. Dickey, M. Feissel, H. Hsu, T. Tanaka General Topics: Topics addressed by Section IV will be : Reference systems, Monitoring and study of time-dependent phenomena, such as polar motion*, geocentric motion, Earth tides, recent crustal movements*, variations of gravity*, seasurface topography including mean-sea level, Geodetic aspects of international geodynamics projects, such as the Lithosphere projects*,

Geophysical interpretation of gravity* and related data~ Papers are solicited in these areas with special emphasis being placed on areas related to current Special Study Groups and Commission: Earth tides; recent crustal movements*, fundamental constants, rapid Earth orientation variations*, long-term variations in Earth rotation*, geocentric motion, global geodynamical variation*, processing of optical polar motion data, studies of the Baltic Sea, studies of vertical datums*, density distribution within the lithosphere*, and geodetic research toward the reduction of natural hazards. *Indicates areas where there are Union, Jointly Sponsored or IAG Symposia; authors, depending on the scope of their paper, may want to submit abstracts to these symposia. IAG Commission IX: Education Convenor: R. Langley and R. Hoisl R. Langley will organize a joint session with IUSM Working Group on Education.

Joint Session of IAG Commission IX Education in Geodesy and the International Union for Surveys and Mapping Working Group on Education (duration : 1/2 day) Convenors : Richard B. Langley, Department of Geodesy and Geomatics Engineering, University of New Brunswick, P.O Box 4400, Fredericton, N.B, Canada E3B 5A3, Phone : +1 506 453 4698, Fax : + t 506 453 4943, E.mail : [email protected] Richard Hoisl, Lehrstuhl ffir Bodenordnung und Landentwicklung, Technische Universit~it Mfinchen, 80290 Mfinchen, Germany, Phone : +49 89 2105 2535, Fax : +49 89 2105 3933, E.mail : BODENORDNUNG @LBL.VERM.TU-MUENCHEN.D400.DE General Topics: The joint session will consist of two 1-1/2 hour sessions. The following topics have been scheduled Presentation of the IUSM Position Paper on Education Invited papers of the commissions on education of the member societies of IUSM on the status and perspectives of their work Outlook on the future of education in surveying and mapping (panel discussion by representatives of the commissions on education) AAS/AIAS Astrodynamics Specialist Conference Halifax, Nova Scotia, Canada, 14-17 A u g u s t 1995 Symposium : Topics of interest include, but are not limited to: orbit dynamics, perturbations and stability,

248 trajectory design and optimization, navigation, guidance and control, attitude dynamics of rigid and flexible space structures Organizing

Committee

We would like to pay special attention to the following topics :

General Chair: Dr. A.K. Misra (AAS) Dr. C.F. Peters (AIAA) Technical Chair: Dr, K. Alfriend (AAS) Dr. I.M. Ross (AIAA) Deadlines

This action of breaking down borders is evident in daily life in the areas of economics, communication, culture, the social sciences, etc., and it is also a factor in the sciences which focus on the Earth and, specifically, in the world of cartography.

for abstracts

:

January 31, 1995 F u r t h e r i n f o r m a t i o n c a n be o b t a i n e d f r o m :

Dr. Kyle T. Alfriend Code SP-A1 Space Systems Academic Group Naval Postgraduate School Monterey CA 93943, USA Phone : (1)-408-656-3769 Fax : (1)-408-656-2816 E-mail :TALFRIEND @MNTRY.NPS.NAVY.MIL or

Dr. I. Michael Ross Code AA-Ro Dept. of Aeronautics Naval Postgraduate School Monterey CA 93943, USA Phone : (1)-408-656-2074 Fax: (1)-408-656-2313 E-mail :ROSS @AA.NPS.NAVY.MIL

17 th International Cartographic Conference, 10th General Assembly of ICA, "Cartography Crossing Borders" Barcelona, Spain, September 3 - 9, 1995. First

Circular

The theme of the 17th International Cartographic Conference (ICC'95) is : "Cartography Crossing Borders" In 1992, at the onset of the '90s, we have a certain historical perspective on the 20th Century and, as the 21st Century approaches, we would try to synthesize where we find ourselves. The subject which we are attempting to deal with, lies within our cartography world : Cartography at the end of the 20th Century is helping us to cross borders, not only political dividing lines, but those imposed on the sciences of cartography and geography.

1. Geophysical Information Systems 2. Digital Cartography and Cartographic generalization 3. Limitations and extensions introduced by digital systems in the cartographic design 4. Digital Cartographic Information: Interchange, standards, distribution and privacity 5. Cartography fir Envirenmental Monitoring 6. Thematic Cartography: Desk-top technologies for design, compilation and production 7. Remote Sensing: New systems and their capabilities and applications in cartography 8. Spatial Data Handling: Analytical techniques and user interface 9. National and Regional Cartographic Agencies: Strategic programmes 10. Hydrographic mapping 11. history of Cartography 12. Regional and National Databases: Common standard 13. Maps for the Handicapped 14. Education, training, and continous education for digital cartography and GIS 15. National and Regional Atlases 16. Theoretical Cartography 17. Social Importance of Cartography 18. Women and Cartography: The Pioneers 19. Navigation Systems (Electronic Chart, Autonavigation and GPS) 20. Multimedia Displays and Hypermapping. These topics are not the limit of the spectrum of what it is possible to deal with; new topics will be accepted following the criteria of the Programme Committee. All the accepted papers will be published on the proceedings of the International Cartographic Conference'95. Further informations

c a n be o b t a i n e d f r o m :

Jaume Miranda i Canals, Chairman Institut Cartogr~fic de Catalunya Balmes, 209-211 E-08006 Barcelona, Catalunya, Spain Phone : (343) 218 87 58 Fax : (343) 218 89 59

Forthcoming Symposia related to Geodesy 1994 November7- 11 9th International Workshop on LASER Ranging Instrumentation

249 Canberra, Australia 1994 November 14 - 25 ICESA Scientific Assembly, 2rid Regional Geodesy and Geophysics Assembly in Africa Ibadan, Nigeria IAG sponsored 1994 November 22- 27 5th Symposium on Geodesy in Africa Harare, Zimbabwe 1994 November 28 - December 2 IAG sponsored Regional Symposium on Recent Crustal Movements in Africa Nairobi, Kenya. 1994 December 6 - 10 AGU Fall Meeting San Francisco, USA SC4 1994 December 6 - 12 Conference Internationale sur la Topographic Geodesic et Topometrie des grands projets lineaires Paris (6-8/12) + Londres (9/12) 1995 January 18-20 ION National Technical Meeting Navigating the 90's: Technology, Applications and Policy Anaheim, USA FIG Corn 6 1995 February 7-10 FIG Survey '95, International FIG Symposium on Engineering Surveying Caoe Town, South Africa

1995 October 16-22 IAG sponsored FISOLS 95 Fifth International Symposium on Land Subsidence The Hague, The Netherlands

Reports of lAG MEETINGS III H o t i n e - M a r u s s i S y m p o s i u m on Mathematical Geodesy, l'Aquila, Italy, May 30 - June 3, 1994. The III Hotine-Marussi Symposium on Mathematical Geodesy was held in l'Aquila (Italy), from May 30 to June 3, 1994. It was organized by Prof. F. Sanst, president of IAG Section IV, with the cooperation of the local host Prof. B. Betti. The Symposium was sponsored by the International Association of Geodesy, the International Union of Geodesy and Geophysics, the University of l'Aquila and the CARISPAQ Foundation. The symposium was attended by more than 70 participants from 15 countries; about 60 papers were presented, covering all the major aspects of mathematical geodesy and, in particular, the fields of celestial mechanics, boundary value problems, gravity field modelling, estimation theory, approximation theory, positioning and inverse problems. The presented papers treated both classical subjects revisited in a modern way and topics which more recently entered into the field of interest of geodesy. Among this I want to mention the theory of chaotic systems, the theory of stochastic BVP and the use of wavelets in approximation theory.

1995 March 26 - April 1 International School - GPS for Geodesy Delft, The Netherlands

Five invited relations were presneted during the symposium.

1995 April 3 - 5 3rd International Workshop High Precision Navigation Stuttgart, Germany

T. Krarup presented a speech entitled "Is Geodesy Possible?", treating the dilemma of the reconstruction of continuous fields from discrete measurements. The final answer to the question of the title was affirmative, encouraging geodesists not to look for another job!

1995 July 2 - 14 IUGG General Assembly, Boulder Colorado, USA

IUGG/IAG

1995 August 14-17 AAS/AIAA Astrodynamics Specialist Conference Halifax, Nova Scotia, Canada 1995 September 3-9 17th International Cartographic Conference, I 0th General Assembly of ICA, "Cartography Crossing Borders" Barcelona, Spain

The other invited papers were: "SAR Interferometry" by F. Rocca and C. Prati, "Accuracy of Orbit Computation for Geodetic Satellites: the Ordered and the Chaotic Case" by A. Milani, "Mathematical Statistics for Spatial Data: the Use of Geostatistics for Geodetic Purposes" by A. Stein and "Boudary Problems for Random Fields" by Y. Rozanov. It must be mentionned that the presence of specialists of disciplines different from geodesy strongly enriched the works of the symposium and was appreciated by all the participants.

250 The scientific work was complemented by a social dinner and an interesting tour in the region surrounding l'Aquila.

which give the information in a transparent fashion. Sometimes, however, I feel that the reader is assumed to know nothing and that he is told every detail possible.

The proceedings will be published by SpringerVerlag.

The book has been written for practitioners in civil engineering. It is useful for geodesists and others who want to inform themselves of all the possibilities of geotechnical instrumentation, in other words: a reference book, not a textbook. It is full of most practical advise up to the very detail.

Fernando Sansb

Book Reviews Dunnieliff John Instrumentation for P e r f o r m a n c e . XX, Wiley @ Sons, New ISBN 0-471-00546-0.

: Geoteehnical Monitoring Field 577 pp., John York etc., 1993,

This thick paperback gives an overview of all practical aspects of geotechnical instrumentation which may arrise in civil engineering projects of all kinds. It is an immensely pragmatic book for contractors, engineers owners, project managers, geologists, instrument manufacturers - but for geodesists and students? It abstains nearly totally from theory. People who apply modern technology in the field get the help do a good job. That is to say, that not necessarily the most sophisticated and expensive instrumentation should be used but more reason and judgement. A plea for simpler instrumentation and for asking specific questions, for caution, care and dedication, written by an experienced geotechnical instrumentation consultant with the assistance of a geotechnical enginner. Scientific questions are not addressed; c.g., in situ measurements of rock and soil properties are not covered. Of all the contents, geodesists will mainly look at Chpt. 12 (deformation). The book is divided into 7 parts; it begins with an overview of instrumentation and soil and rock behavior, Pt. 2 is on planning. Pt 3 is on monitoring methods, 4 on "General Guidelines on the Execution of Monitoring Programs, 5 on examples of instrumentation applications. Pt. 6 is titled "The Key to Success" and Pt. 7 contains Appendices A through H, covering such features as checklists, a list of manufacturers, dimensions, conversion factors, completed by references and an index. The most extensive chapter is that on deformation, including surveying methods, and the reader may be surprized how many varieties of measuring principles and instruments do actually exist. The author has achieved his aim to give the engineers and others involved in geotechnical monitoring a practical guide haw to solve most of the problems that may arrise. Quantitative methods are presented in recipe fashion, including practical instructions, guidelines and checklists. Illustrations and diagrams are numerous, adequate and of good quality. Frequently, after a few pages of text, tables are inserted

The book is highly recommended for those who deal with geotechnical instrumentation in practice. It is also useful in libraries of institutions of civil engineering (also geodesy) and applied geology as a reference book. W. Jacoby, Mainz

Fast Bibliography Here are listed the bibliographic items received by the Central Bureau, the Editor in Chief, or the Dresden Center which is also charge of the full and comprehensive publication of the International Geodetic Bibliography. These pages will be included in each issue of the Bulletin Geodtsique, presenting in a fast way the new information collected since the previous number nominally three months. Two parts contains respectively the books, reports, proceeding or else received (part A) and the geodetic papers published in journals or presented at symposia

(p~B) PART A B o o k received

94A0097 : Central Bureau of IERS : 1993 IERS Annual Report, July 1994. 94A0098 : D'Hollander R. : L ' A s t r o l a b e , Les Astrolabes du Mus6e Paul Dupuy. 94A0099 : Konttinen R. : The Program for the 1993 adjustment of the Finnish first-order terrestrial triangulation, Publications of the Finnish Geodetic Institute, July 1994. 94A0100 : Noomen R., B.A.C. Ambrosius, K.F. Wakker : Crustal Motions in the Mediterranean Region Determined from Laser Ranging to LAGEOS, Delft University of Technology, Delft, The Netherlands.

251 94A0101 : Hanssen R.H. : The application of Randon transformation for improved analysis of sparsely sampled data, TU Delft, Faculty of Geodetic Engineering, December 1993. 94A0102 : Indice Generale dal 1941 al 1991, prima parte (Indice per autori), Bolletino di Geodesia e Scienze Affini, supplemento al n ° 2, 1994. 94A0103 : Proceedings of the International Conference on Cartography-Geodesy, 5 th Centiennal of Americas, Maracalbo, Venezuela, 1992. 94A0104 : Artificial Satellites, Planetary Geodesy, 21, 29, 1, 1994. 94A0105 : Proc. of the International Symposium on Kinematic Systems in Geodesy, Geomatics and Navigation, KIS'94, Banff, Canada, 1994. PART B Geodetic Papers

94B0128 : Chen J.Y., Y.N. Liu, J. Chang, J.J. Zhang : On the Local Gravity Field Determination in the Mr. Everest, Selected Papers for English Edition, Acta Geodatetica et Cartographica Sinica 1993, pp. 11-18. 94B0129 : Shaorong Z., Y. Zongchou, T. Benzoa, Y. Zhinglin : Theory of Dynamic Geodetic Inversion and its Applications, Selected Papers for English Edition, Acta Geodatetica et Cartographica Sinica 1993, pp. 19-30. 94B0130 : Hautong Z., L. Zhipping : Testing and Unified Expression of the Coordinate Transformation Models, Selected Papers for English Edition, Acta Geodatetica et Cartographica Sinica 1993, pp. 31-40. 94B0131 : Dajiz Liu, L. Jingnan, L. Guohui : The Three-dimensional Combined Adjustment of GPS and Terrestrial Surveying Data, Selected Papers for English Edition, Acta Geodatetica et Cartographica Sinica 1993, pp. 41-54. 94B0132 : Juliang S., L. Deren : Wavelets and Image Processing, Selected Papers for English Edition, Acta Geodatetica et Cartographica Sinica 1993, pp. 55-72. 94B0133 : Zhaobao Z. : The MRF's Application to Image Texture Simulating, Selected Papers for English Edition, Acta Geodatetica et Cartographica Sinica 1993, pp. 72-81. 94B0134 : Qiao W., H. Yuju : A King of Adjustable Map Projection with "Magnilying Glass" Effect, Selected Papers for English Edition, Acta Geodatetica et Cartographica Sinica 1993, pp. 82-93.

94B0135 : Guohui X., Z. Fengyu, L. Bidong, L. Jinjie: Geomagnetic Declination Chart and Mathematical Model in Maritime Area of China, Selected Papers for English Edition, Acta Geodatetica et Cartographica Sinica 1993, pp. 84-102. 94B0136 : Jingdao Z. : Establishment of Mathematical Model and Writing of Software in the Procedure of Trichromatic Printing and Reproduction, Selected Papers for English Edition, Acta Geodatetica et Cartographica Sinica 1993, pp. 103-116. 94B0137 : Jiongyu X., X. Zhizhon : The Third Generation Satellite Laser Ranging System at Wuhan SLR Station, Selected Papers for English Edition, Acta Geodatetica et Cartographica Sinica 1993, pp. 117-125. 94B0138 : Zongren C., L. Dexan : A Investigation on Systematic Errors of TDJ7 Precision Gyroscopic Theodolite, Selected Papers for English Edition, Acta Geodatetica et Cartographica Sinica 1993, pp. 126. 94B0139 : Robertson D.S., J.R. Ray, W.E. Carter : Tidal variations in UT1 observed with very long baseline interferometry, J. Geophys. Res, 99, n°B1, pp.621-636, January 1994. 94B0140 : MacMillan D.S., C. Ma : Evaluation of very long baseline interferometry atmospheric modeling improvements, J. Geophys. Res, 99, n°B 1, pp.637-652, January 1994. 94B0141 : Kaminski W., Z. Wisnieewski : The method of growing rigor for the adjustment of geodetic observations contamined by cross errors, Manuscrip. Geod., 19, n°2, pp.55-61, 1994. 94B0142 : Bian S., H. Sun : The expression of common singular integrals in physical geodesy, Manuscrip. Geod., 19, n°2, pp.62-69, 1994. 94B0143 : Freeden W., T. Gervens, M. Schreiner : Tensor spherical harmonics and tensor spherical splines, Manuscrip. Geod., 19, n°2, pp.70-1O0, 1994. 94B0144 : Keller W., M. Hirsch : A boundary value approach to downward continuation, Manuscrip. Geod., 19, n°2, pp.100-118, 1994. 94B0145 : Vanicek P., Z. Martinec: The StokesHelmert scheme for the evaluation of a precise geoid, Manuscrip. Geod., 19, n°2, pp. 119, 1994. 94B0146 : Wakker F.K., M.C. Naeije, E. Wisse, R. Scharroo, P.N.A.M. Visser, B.A.C. Ambrosius : Geosat and ERS-1 Radar Altimetry Over the North Atlantic, Advances in Space Research, 13, n°l 1, 1993. 94B0147 : Visser P.N.A.M., K.F. Wakker, B.A.C. Ambrosius : Global gravity field recovery from

252

the ARISTOTELES satellite mission, J. Geophys. Res,

using laser technique, Manuscr. Geod., 19, n ° 5, pp.

99, n°B2, pp.2841-2851, February 1994.

294-299, 1994.

94B0148 : Overgaauw B., B.A.C. Ambrosius, K.F. Wakker : Analysis of the EUREF-89 GPS data from the SLR/VLBI sites, Bulletin G6odEsique, 68, pp.19-28, 1994.

94B0161 : Misra P.N., R.I. Abbot, SGS85-WGS84 transformation, Manuscr. Geod., 19, n ° 5, pp. 300-308, 1994.

94B0149 : Freedman A.P., J.A. Steppe, J.O. Dickey, T.M. Eubanks, L,Y. Sung : The short-term prediction

of universal time and length of day using atmospheric angular momentum, J. Geophys. Res, 99, n°B4, pp.6981-6996, April 1994.

94B0162 : Johnson H.O., F.K. Wyatt, Geodetic network design for fault-mechanics studies, Manuscr. Geod., 19, n ° 5, pp. 309-324, 1994. 94B0163 : de Toro C., P. Venedikov, R. Vieira, A new method for earth tide data analysis, Bull. d'Information Mardes Terreslxes, 116, pp. 8557-8586, 1993.

94B0150 : Richard It.R., Y.M. Wang : Dynamic

topography estimated using Geosat data and a gravimetric geoid in the Gulf Stream region, Geophys. J. Int., 117, pp.511-528, 1994.

94B0164 : Sardon E., A. Rius, N. Zarraoa, GPS ionospheric delays, Instituto de Astronomia y Geodesia, Publ. 185, Madrid, 1993.

94B0151 : Linkwitz K., J. Bahndorf : Wet component of tropospheric delay for microwaves from surface meteorological data, Artificial Satellites, Planetary

94B0165 : Sevilla M.J., Teoria de errores de observacion, Fisica de la Terra, 5, pp. 133-166, 1993.

Geodesy, 28, n°20, n°3, 1993.

94B0166 : Wagner C.A., J. Klokocnik, Accuracy of the

94B0152 : Blaha G. : Non-iterative approach to nonlinear least-squares adjustment, Manuscr. Geod., 19, n ° 4, pp. 199-212, 1994.

GEM-T2 geopotential from the Geosat and ERSI crossover altimetry, J. Geophys. Res., 99, B5, pp. 9179-9202, 1994. 94B0167 : Defraigne P., J. Hinderer, Stacking gravity

94B0153 : Martinec Z., P. Vanicek : The indirect effect

, of topography in the Stokes-Helmert technique for a sperical approximation of the geoid, Manuscr. Geod.,

tide measurements and nutation observations in order to determine the complex eigenvalue of the nearly diurnal free wobble, J. Geophys. Res., 99, B5, pp. 9203-9214,

19, n ° 4, pp. 213-219, 1994.

1994.

94B0154 : Zhao S. : Inversion of dynamic geodetic data with finite element method, Manuscr. Geod., 19, n ° 4,

94B0168 : Westaway R., Present-day kinematics of the Middle East and easern Mediterranean, 'J. Geophys.

pp. 220-230, 1994.

Res., 99, B6, pp. 12071-12090, 1994.

94B0155 : Merminod B., C. Rizos : Optimization of rapid static GPS surveys, Manuscr. Geod., 19, n ° 4, pp. 231-246, 1994.

94B0169 : Soler T., D.W. Eisemann, Determination of

94B0156 : Belikov M.V., E. Groten, On solutions to Laplace's tidal equations in linear approximation,

94B0170 : Soler T., B.H.W. van Gelder, Comment on

Manuscr. Geod., 19, n ° 4, pp. 247-256, 1994.

look angles to geostationnary communication satellites, J. Survey. Eng., 120, 3, pp. 115-127, 1994.

the Earth'sequatorial principle axes and moments of inertia by H.S. Liu and B.F. Chao, Geophys. J. Int., 113, p. 270, 1993.

94B0157 : Martinec Z., P. Vanicek : D i r e c t

topographical effect of Helmert's condensation for a sperical approximation of the geoid, Manuscr. Geod.,

94B0171 : Chao B.F., H.S. Liu, Reply to Soler and van Gelder, Geophys. J. Int., 113, pp. 268-269, 1993.

19, n ° 5, pp. 257-268, 1994. 94B0158 : Barriot J.P., Line of sight operators in planetary geodesy, Manuscr. Geod., 19, n ° 5, pp. 269283, 1994. 94B0159 : Ou Z., K.-R. Koch, Analytical expressions for Bayes estimates of variance components, Manuscr. Geod., 19, n ° 5, pp. 284-293, 1994. 94B0160 : Klioner S., T. Fukushima, Relativistic

effects in two-way time transfer via artificial satellites

94B0172 : Soler T., B.H.W. van Gelder, Reply to Liu and Chao, Geophys. J. Int., 113, p. 271, 1993.