Communication and Outreach Branch
of Geodesy and Surveying
University of Technology and Economics
H-1521 Budapest, Hungary
Information Service of the International Association of
2018 ILRS Governing Board Election
Call: International Climate Protection
IAG Sponsored Meetings
Workshop on GNSS Ionosphere (IWGI2018)
International Workshop on Laser Ranging
International Symposium on Deformation Monitoring (JISDM)
IAG Related Meetings
European Space Policy Conference
Satellite Navigation Summit 2019
Symposium of the Committee on Space Research (COSPAR)
Report of Gravity Geoid and Height
Systems 2018 GGHS2018
Prof. Dr.-Ing. Hermann Maelzer (1925
Mikhail Tikhonovich Prilepin (1929
The IAG Newsletter is under the
editorial responsibility of the Communication and Outreach Branch (COB)
of the IAG.
It is an open
forum and contributors are welcome to send material (preferably in electronic
form) to the IAG COB (firstname.lastname@example.org). These contributions should complement
information sent by IAG officials or by IAG symposia organizers (reports and
announcements). The IAG Newsletter is published monthly. It is
available in different formats from the IAG new internet site: http://www.iag-aig.org
Newsletter includes several of the following topics:
news from the Bureau
reports of IAG
reports by commissions,
special commissions or study groups
VII. fast bibliography
The election of
members for the next ILRS Governing Board has been completed. The members for
the next term of the Board, taking office in November are:
Director of the
Central Bureau Mike Pearlman (appointed)
Secretary of the
Central Bureau Carey Noll (appointed)
of IAG Commission 1 Urs Hugentobler (appointed)
IERS Representative Daniela
Representatives Pippo Bianco, Georg Kirchner
Representatives Jan McGarry, Stephen Merkowitz
Representatives James Bennett, Zhang Zhongping
Representatives Cinzia Luceri, Erricos Pavlis
LLR Representative Jean-Marie
Representative Christian Schwatke
Representatives Toshi Otsubo, Matt Wilkinson
members of the Board will be appointed by the Governing Board, bringing total
membership to 18 members. The chair will be elected at a meeting of the Board
held in conjunction with the 21st International Workshop on Laser
Ranging in November.
ILRS Central Bureau
deadline: 1 March 2019
von Humboldt Foundation grants up to 20 fellowships to prospective leaders from
non-European transition or developing countries, who are active in any of the
following areas: scientific, engineering-based, legal, economic, health-related
or social aspects of climate change. The young climate experts will come to
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A monthly fellowship of between 2,150 and 2,650,
depending on career stage
Individual mentoring during the stay in Germany
Additional financial support for items such as
family allowances, travel expenses or a German language course
A three-week introductory phase, during which
fellows will have the opportunity to make contact with other climate protection
fellows and visit companies, research institutions and cultural events in Germany
Extensive alumni sponsorship, especially support
for networking with collaborative partners in Germany during the fellow's
entire professional career
Citizenship of a non-European transition or
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Bachelors or equivalent academic degree completed
less than twelve years ago
A mentoring agreement signed by a host in
A proposal which candidates must draw up on
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Clearly visible leadership potential
Extensive theme-related professional experience
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information, a list of all application requirements and a link to the online
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have any questions regarding the International Climate Protection Fellowship
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von Humboldt Foundation
October 29 November 2, 2018, Wuhan,
November 4-6, 2018, Shanghai, China
November 5-9, 2018, Canberra, Australia
May 15 17, 2019, Athens, Greece
May 22 24, 2019, Tallinn, Estonia
July 8 17, 2019, Montreal, Canada
November 13-16, 2018, Toulouse, France
International Technical Symposium on
Navigation and Timing
December 10-14, 2018, Washington, D.C.,
January 22 23, 2019, Brussels, Belgium
March 25-27, Munich, Germany
April 7-12 , 2019, Vienna, Austria
May 13-17 , 2019, Milan, Italy
July 28 August 2, 2019, Singapore,
August 12-13, 2019, Prague, Czech
November 4-8, 2019, Herzliya, Israel
2nd Joint Symposium of IAG Commission 2 and IGFS
Gravity, Geoid and Height Systems 2018 meeting was the second Joint IAG
Commission 2 and IGFS Symposium. It took place in Copenhagen, Denmark,
between September 17-21, 2018, at the Black Diamond conference building,
which is part of the Royal Library of Copenhagen. Its main focus was on methods
for observing, estimating and interpreting the Earths static and time-variable
gravity field as well as its numerous applications.
GGHS2018 continued the long history of
IAGs Commission 2 Symposia, GGG2000 (Banff, Canada), GG2002 (Thessaloniki,
Greece), GGSM2004 (Porto, Portugal), GGEO2008 (Chania, Greece), GGHS2012
(Venice, Italy), with those of IGFS, 1st IGFS Meeting 2006 (Istanbul Turkey),
2nd IGFS Meeting 2010 (Fairbanks, Alaska, USA), 3rd IGFS Meeting 2014
(Shanghai, China), and finally the first joint Commission 2 and IGFS
meeting 2016 (Thessaloniki, Greece).
GGHS2018 was structured in 7 sessions
spanning the entire 5 days of the program. The oral session programme was
complemented by two poster sessions on Tuesday and Thursday afternoon. In the
opening session on Monday morning, the whole bandwidth of geodesy could be
demonstrated by four presentations covering the topics of satellite gravity
missions GRACE/GRACE-FO, cold atom interferometry for gravity determination,
advances in the establishment of the International Height Reference Frame
(IHRF), and physical height determination of Mount Sagarmatha (Everest).
For GGHS2018, 164 abstracts have been
received, out of which 87 have been scheduled as oral presentations and 77 as
posters. 155 participants from 35 countries participated in the conference. It
should be particularly emphasized that this symposium was able to attract also
the young generation of scientists, since about 1/3 of the total number of
participants were either MSc Students or PhD candidates.
Distribution of GGHS2018 participants by country
The scientific program of GGHS2018 was of
outstanding quality and showed significant scientific advancements in several
fields of gravity field research, which are briefly summarized in the
1: Current and future satellite gravity missions
(Chairs: Thomas Gruber and David Wiese)
successful launch of GRACE-FO in May 29 will continue the time series of Earth
mass transport. Satellites are in the IOC phase, and despite some initial
challenges with the flight system, preliminary gravity fields look promising.
data processing continues to mature, lowering error levels in the solutions,
and improving geophysical interpretation. Official GRACE SDS centers have
released RL06 data products, and new products from GSFC and ITSG are also
of GOCE gravity gradients and orbits is currently ongoing, and first results of
pure gradiometer based gravity models indicate improvement of 20-30% globally
with respect to the release 5 models. The new release 6 is expected for early
NGGM concepts appear promising to improve spatio-temporal resolution. The focus
should still be on reducing temporal aliasing errors for future missions.
Further, advanced technology such as cold atom interferometry appear promising.
2: Global gravity Field Modelling
(Chairs: Dan Roman and Shuanggen Jin)
update on NGAs EGM2020 is in progress, final data submission should be done by
performance of early satellite altimeter missions have been reviewed and
improvements from SAR altimeters have been discussed.
and error of global gravity models have been assessed, and a potential impact
of new GOCE/GRACE satellite models for EGM2020 has been emphasized.
reprocessing campaign, the performance of GOCE data could be significantly
improved, which should also be reflected in improved EGMs.
combination methodologies for terrain and satellite for high-resolution EGMs
could be developed.
3: Local/regional geoid determination methods and models
(Chairs: Jonas Agren and Hussein Abd-Elmotaal)
regional geoid projects have progressed and achieved better precision
(examples: geomed2 for the Mediterranean sea, FAMOS for the Baltic Sea, NEVER
for the Netherlands, Belgium & Dutch continental shelf).
have been achieved in the activities of the IAG sub-commissions on gravity and
geoid (e.g., Africa) and the related joint working groups (e.g., JWG 2.2.2 The
1 cm geoid experiment).
technique for validating the airborne gravity data, being a suitable
alternative to cover the gravity data gaps in many places such as Antarctica,
Philippines, Africa, has been proposed and tested.
multi-scale radial basis function modeling of regional gravity fields to
improve the quality of the computed geoid/quasi-geoid has been achieved by the
estimated sequential parameterization.
geoid determination for various places of the world has been improved reaching
the cm level (examples: USA, Croatia, Greece, Slovakia, Estonia, Latvia, etc.).
4: Absolute, relative and airborne gravity observations and methods
(Chairs: Leonid Vitushkin and Rene Forsberg)
session highlighted new developments in the absolute gravimetry, especially for
cold atom interferometry (both static and kinematic in ships and aircraft), as
well as the large-scale international coordination of absolute gravimetry (e.g.
in South America). The global absolute gravity network is consolidating its
efforts, and represent a global infrastructure. Exchange formats for gravimetry
marine and airborne gravimetry developments continue with improved processing,
new sensors, and increasing accuracy. IMU-based sensors get to the mGal level,
and by the shrinking size these units could eventually be deployed on drones.
Large ongoing projects, such as GRAV-D, continues to cover major regions of the
globe. Land vehicle gravimetry also develops, and results at 1-2 mGal
level demonstrated in China.
changing gravity in connection with major geodynamic events are clearly
measured, by a combination of absolute and relative gravimeters. The measured
changes show good correlation with the associated vertical movements, e.g. from
SAR interferometry, GPS or levelling. Superconducting gravimeters continue to
measure the time varying gravity field, and there is a need to co-observation
with the developing quantum gravimeters. Exceptional results of multiyear over
almost thirty years measurements by superconducting gravimeter were featured.
status of the International absolute gravity reference system, which is under
the formation according to the resolution of IAG of 2015, was also presented.
5: Height systems and vertical datum unification
(Chairs: Michael Sideris and Laura Sanchez)
on the corresponding IAG 2015 resolution, important activities towards the
definition and realization of the International Height Reference System/Frame,
such as vertical datum unification within the IHRS, and numerical experiments
for the computation of IHRS coordinates (Colorado experiment), have been
standards for the IHRS/IHRF, proposals for treatment of tide system, and on
parameters for a new GRS have been made.
on regional/National/Local vertical reference systems and frames have been
performed in Brazil, Czech Republic, Ecuador, Germany, Japan, Philippines,
Poland, Latin America, Great Lakes.
datum unification strategies with complementary data and models have been
presented, such as SAR/SARin combined with terrestrial gravity data, satellite
altimetry and GOCE, hydrodynamic models, InSAR on land.
potential of new approaches such as relativistic geodesy and quantum sensors,
chronometric levelling, optical clock networks, have been discussed and
6: Satellite altimetry and applications
(Chairs: Ole Andersen and Xiaoli Deng)
method using satellite gravimetry to unravel satellite altimeter record of sea
level change has been discussed.
models of mean sea surface and dynamic ocean topography have been presented.
altimeter records have been re-analyzed to identify non-linearities of mean sea
prediction of Arctic bathymetry from marine gravity has been presented.
7: Mass transport and climate-relevant processes
(Chairs: Carmen Boening and Annette Eicker)
has been made on climate-related signals in Earths oblateness.
of sea level fingerprints in ocean bottom pressure observations was analyzed,
and their importance for OBP interpretation was emphasized.
insights into drought signals could be expanded.
frontiers in using GRACE for climate model evaluation were discussed.
potential of NGGMs for advanced applications was explored.
and GPS were integrated to evaluate ice mass changes and GIA errors.
In addition to the scientific programme,
GGHS2018, also hosted a number of splinter meetings, where vibrant exchange of
ideas took place. The following splinter meetings have been organized:
VIII. IAG Commission 2 Steering Committee
IX. IGFS business meeting
X. JWG 2.1.1: Absolute
gravity reference system and frame
XI. JWG 2.2: Validation of
combined gravity model EGM2020
XII. Joint meeting of JWG 0.1:
Strategy for the Realization of the International Height Reference System
(IHRS), and JWG 2.2.2: The 1-cm Geoid Experiment (Colorado experiment)
XIII. NKG/NGA EGM2020 database meeting
XIV. FAMOS Baltic Sea project meeting
Significant progress has been made in
response to the two IAG 2015 resolutions. The status and main conclusions are
1. Definition and realization of an
International Height Reference System
Support by SC 2.2 and associated JWG 2.2.2 (1
cm geoid experiment) has been shown to be highly beneficial.
Reference point selection is almost completed.
Processing strategies for potential values is
about to converge.
First version of IHRS should be ready by IUGG
2. Establishment of a global absolute
gravity reference system
Concepts for establishing system and frame are
Co-location of reference sites with IHRS sites
Definition of the system shall be completed
before IUGG 2019.
It is encouraged to submit manuscripts
related to all abstracts accepted and presented at the GGHS2018 conference
(either oral or poster) in the online peer-reviewed open-access Journal of
Geodetic Science. Specific instructions for authors have
been supplied to all participants of the conference, and are available on the
Deadline for submission is November 30, 2018.
René Forsberg (DTU
Space, Chair of LOC)
Maria Tammelin Gleerup
(DTU Space / Security DTU)
Per Knudsen (DTU
Kristian Keller (SDFE
- Danish Agency for Data Supply and Efficiency)
Roland Pail (TU
Munich, President of IAG Commission 2)
(Politecnico di Milano, President of IGFS)
(University of Texas)
René Forsberg (DTU
Dr. Hermann Maelzer,
formerly Professor for Geodynamics at the University of Karlsruhe (now:
Karlsruhe Institute of Technology, KIT) and Director of the Geoscientific
Observatory at Schiltach (Black Forest Observatory, BFO) in Germany, passed
away peacefully on August 20, 2018 in the blessed age of 93 years.
He was born on April 19, 1925 in Ponitz/Germany as son of a
farmer. Upon completing High School and Military Service in World War II
Hermann Maelzer started his career as a survey technician apprentice, before he
enrolled in the geodetic programme at the Technical University of
Berlin-Charlottenburg, Germany, from which he graduated with a Dipl.-Ing.
degree in 1953. In the same year he married his wife Gisela, and they moved to
South Germany, where Hermann Maelzer filled various positions at the Geodetic
Institute of the University of Karlsruhe within the 35 years to follow until
his retirement. In 1958 he received the Dr.-Ing. degree, having submitted his
Doctor dissertation On the adjustment of levelling networks by successive
approximation to the Faculty of Civil Engineering and Surveying of the Technical
University of Karlsruhe. A special highlight within the first decade was his
participation in the International Glaciological Expedition to Greenland (EGIG)
in 1959 and in two other scientific expeditions to Ethiopia. Triggered by these
expeditions, but also caused by his activities as supervisor of the seismic
station in the basement of the Geodetic Institute, he early had
interdisciplinary contacts to other branches of geoscience, providing a strong
impact on his further scientific work. In 1972 he additionally took over the
directorate of the newly installed joint geoscientific observatory of the
Universities of Karlsruhe and Stuttgart near Schiltach/Germany (Black Forest
Observatory, BFO), before he finally received the status of Full Professor for geodynamics
which he held until his retirement in 1988. He was an enthusiastic academic
teacher - his lectures on Least Squares Adjustment and Physical Geodesy, though
strongly demanding, had great impact on his students.
Undoubtedly, the most prominent achievement of the
scientific life work of Hermann Maelzer is the foundation and management of the
BFO, which had been installed in 1971 in a former silver mine in the Black
Forest. Under his directorate the BFO, into which he put a lot of his heart,
soul and time, developed to a worldwide leading geodynamic observatory. While
the focus within the first decades was put on Earth tide research, later on the
main interest switched to the registration and analysis of seismic signals as
well as to the observation of free oscillations of the Earth (as excited by
large earthquakes) and temporal changes of the Earths magnetic field. Due to
the extremely quiet surrounding of the BFO in the crystalline rock, the
broad-banded observation data possess an extraordinary low noise level and an
outstanding quality, allowing the first worldwide detection of various
geodynamic phenomena. The present status of the BFO is strongly tracing back to
the vision, skill and expertise of Hermann Maelzer. He also maintained good
contacts to other geodynamic observatories, in particular to
Walferdange/Luxembourg; recognizing his merits for the cooperation of both
observatories the Grand Duke of Luxembourg and Duke of Nassau handed over the
Ordre Grand Ducal de la Couronne de Chene to him in 1994.
Since the end of the 1960ies a second focus of Hermann
Maelzers scientific activities was the determination of recent crustal motions
from geodetic observation data, in particular from repeated precise levellings.
Starting with the evaluation of levellings in the region of the Upper Rhine
Graben, one of the most active seismic regions in Europe north of the Alps, he
extended the analysis to other regions in Germany. Based on his expertise in
this field, many years until his retirement he chaired the Working Group on
recent height changes, installed by the German Geodetic Commission (DGK). This
group, organized and strongly inspired by him, succeeded in publishing the
first map of recent height changes in West Germany in the year 1979, based on the
levelling data delivered by the surveying authorities of the Federal States of
Germany. The scientific contributions of this working group were fully
integrated into the aims of IAG Commission VII Recent Crustal Movements
(CRCM), in accordance with the geoscientific programmes of the Inter-Union
Commission of Geodynamics (till 1979) and the Inter-Union Commission on the
Lithosphere (ICL, since 1981). Many years Hermann Maelzer was engaged in the
Directing Board of the International Centre on Recent Crustal Movements
(ICRCM), acting as a central agency within the framework of the CRCM. Due to
his merits for the observation and analysis of recent crustal movements and his
activities in ICRCM he received the Mescherikov medal of IAG in 1991.
Hermann Maelzer was active in many scientific
organisations. From 1979 until his retirement in 1988 he was an ordinary member
of the German Geodetic Commission (DGK) and, among others, member of the
research board of trustees Physics of the Earth.
Despite various strokes of fate, starting with the loss of
his homeland after World War II up to the early death of his wife Gisela in
1999, Hermann Maelzer had maintained his subtle humour and his proverbial
sunny disposition till the end. He had a strong influence not only on the
development of the Geodetic Institute in Karlsruhe in research and academic
teaching, but also on the interdisciplinary cooperation within the geosciences
in Germany and internationally.
His academic students, co-workers, friends and colleagues will
remember Hermann Maelzer not only as a highly committed and enthusiastic
university teacher and scientist, but also as a modest, kind and extremely
reliable person. We are grateful to him for his extraordinary achievements and
will always honour his memory.
On September 19, 2018,
Mikhail Tikhonovich Prilepin passed away a well-known geodesist, doctor of
technical sciences, an expert in the field of electronically-optical
measurements, satellite navigation systems and geodynamics, as well as studying
the deformations of the earth's crust using ground-based and satellite
Mikhail Tikhonovich was born on February 15, 1929 in the
village of Kalikino in the Dobrovsky district of the Lipetsk region. His
youthful years fell on hard wartime and post-war time in the town of Pokrov of
the Vladimir Region. After graduating from Pokrovsk secondary school, Mikhail
Tikhonovich entered the Moscow Institute of Engineers of Geodesy, Cartography
and Aerial Photography (MIIGAiK), from which he graduated with honors in 1951
with a degree in astronomy-geodesy.
In 1952, he participated in the work of the Aerogravimetric
Expedition of the Geophysical Center of the Academy of Sciences of the USSR,
and in November of the same year he was enrolled in full-time postgraduate
studies at TsNIIGAK and part-time junior research assistant.
In 1957, he defended his Ph.D thesis "The
determination of the refractive index of air when measuring distances by
light-modulating range finders" under the guidance of prof. A. A. Izotov.
In 1958-1959 he worked in the Syrian Arab Republic. At the
Moscow Region test site, TsNIIGAK created a geodetic network in the form of a
central system, which allowed to conduct research in the field of
high-precision angular measurements (including due to the influence of
refraction, torsion of triangulation constructions), and also to test new
geodetic instruments. Since 1961 - Senior Researcher of MIIGAiK. In the article
Reduction to the surface of the reference of distances measured by light and
radio range finders (Geodesy and Cartograhy, 1956, No. 2, 1923), M. T.
Prilepin derived a formula for reducing distance measuring with a relative
error of 107 with accuracy measurements 10-6; he also
noted that when reducing the bases measured by the range finders, knowledge of
the plumb line deflection is not required. Since 1966 - Associate Professor of
the Department of Higher Geodesy MIIGAiK. He defended his doctoral thesis
Studies in geodetic refractometry in 1972. From 1973 to 1983 he was a
professor at the Department of Higher Geodesy at MIIGAiK.
During these years, the main direction of the scientific
works of Mikhail Tikhonovich was the improvement of means and methods of
high-precision geodetic determinations. They have patented and introduced
methodological and technical improvements to the most diverse types of geodesic
measurements, ranging from theodolite and laser distance meter to a long-range
interferometer and a radio astronomical lens antenna (Japanese patent).
Since 1983, Mikhail Tikhonovich works at the Schmidt
Institute of Physics of the Earth RAS. During this period, his work is mainly
devoted to the study of movements of the earth's crust, as well as geodynamic
and geophysical processes, including the preparation of strong earthquakes, by
means of GPS. The geography of his scientific journeys is truly amazing. These
are the countries of Europe, and America, Japan, Australia.
In 1997, Mikhail Tikhonovich became the head of the geodesy
section of the National Geophysical Committee of Russia, replacing the
world-famous gravimetry scientist Yu.D. Boulanger. Mikhail Tikhonovich until
the last days was a member of the bureau of this section. He was chairman of a
number of international symposia and participated in many of them in the field
of solving geodynamic problems by geodetic methods. Geodesy and seismology.
Deformations and Prognosis was the name of the international symposium on the
anniversary of the Spitak earthquake, held by Mikhail Tikhonovich in Yerevan in
1989. He was the editor and author of several issues of the National Report on
Geodesy submitted to the General Assembly of the International Union of Geodesy
and Geophysics. M.T. Prilepin is one of the first organizers of observations of
the movements of the earth's crust on the territory of the USSR and Russia
using modern navigation satellite systems. Especially vigorously, he studied
the Caucasus region as part of an international group. His works are actively quoted
by Russian and foreign scientists. He is widely known in European as well as
international scientific circles. The scientific heritage of Mikhail
Tikhonovich includes more than 240 scientific papers. He is among the 100 most
cited Russian geophysicists. Honorary Professor of MIIGAiK, awarded the medals
"Veteran of Labor" and "In memory of the 850th anniversary of
Moscow." Over the years, he received numerous commendations from the
leadership of the IPE RAS.
In the International Association of Geodesy (IAG),
Professor M.T. Prilepin served as the Secretary of IAG Section I (Positioning)
(1983-1987 and 1987-1991), President of Section I and a member of IAG Executive
Committee (1991-1995). As a very active member he was invited in a number of
IAG Special Study and Working Groups. For his great contribution he was awarded
IAG Fellow in 1991. He was the IAG Correspondent of Russia and former USSR
between 1991-2007 in four periods of IAG activity.
Mikhail Tikhonovich brought up more than one generation of
scientists. His numerous graduate students successfully work both in our
country and abroad.
Mikhail Tikhonovich was a caring, loving father and spouse.
He raised a daughter and two sons, all inherited a commitment to the exact
sciences. One of the sons continues to be engaged in applied scientific
research close to geophysics. Mikhail Tikhonovich was a kind and wise mentor to
grandchildren. He conveyed his love of physics and astronomy to his
granddaughter, who conducted active research in theoretical physics of
In life and work, Mikhail Tikhonovich was demanding of both
himself and others, but at the same time he was always very kind and fair. So
we will remember him forever.
Spiridonov E.A., Popadiev V.V.