President: Mirko Reguzzoni, Director: Giovanna Sona
The International Service for the Geoid (ISG), hosted by Politecnico di Milano in Italy, was founded in 1992 as a working arm of International Geoid Commission (IGeC). It is currently an official service of the International Association of Geodesy (IAG), and is also related to the works of the IAG Commission 2 on Gravity Field. Its activities are coordinated by the International Gravity Field Service (IGFS), established in 2003, that integrate the broader gravity field researches of the: International Service for the Geoid (ISG), International Gravimetric Bureau (BGI), International Geodynamics and Earth Tide Service (IGETS), International Centre for Global Earth Models (ICGEM) and International DEM Service (IDEMS). ISG's activities are on educational, research, and data distribution sides: the principal purposes of ISG are the collection and distribution of geoid models, the collection and distribution of software for geoid computation, and the organization of technical schools and specific trainings on geoid determination techniques.
One of the main task of ISG is to collect, analyse and redistribute local, regional and continental geoid models, keeping its on-line repository constantly updated, and providing also software for estimating and handling geoid models. Public and on-demand regional geoid models are distributed with a unique ISG ASCII format. Basic information and references are provided for all regional models in the geoid repository, that recently exceeded the number of 150.
As regards research activities, ISG participates to international projects and working groups with the aim of improving methodologies for the determination of the geoid at global and local level. Among the others, ISG took part in the European Gravity Geoid Project, the International ESA Gradiometric Mission (GOCE), the Global Geodetic Observing System project (GGOS), the International Height Reference System project (IHRS) for the height datum unification, computation of improved geoids for Italy and the Mediterranean area GEOMED-2 project (2015-2017).
ISG staff is formed by four senior scientists (including president and director), four other scientists expert in Geodesy and one secretary. Moreover a group of ten international geodesists compose the ISG advisory board.
Within the structure of ISG, Working Groups can be established for specific purposes, limited in time.
A technical publication is edited, the IGeS Bulletin, transformed in 2003 into the Newtons Bulletin, and published in cooperation with the International Gravimetric Bureau (BGI). The Newtons Bulletin has a technical and applied nature and it has been recently selected by the geodetic community for publications on the assessment of EGM2008 and GOCE global gravity models. On the website www.isgeoid.polimi.it all the issues of the Bulletins are available.
As mentioned, the Service has also educational purposes: one of the main tasks of ISG consists in organizing or supporting technical schools on geoid estimation and related topics, held possibly every two years.
The First International School for the Determination and Use of the Geoid was organized in Milan in 1994, and since then many other editions of the School followed, held in many countries, with the support of local organizing committees.
The following table shows the years, the locations, the number of participants and the number of involved countries of the past editions of the International Geoid School :
During the schools both theoretical and practical aspects are illustrated, and students are trained in the use of the relevant software for geoid computation. The general purpose of the full-week intensive Geoid School is to prepare new graduate students, young scientists, employees of national agencies and services or industry staff, to compute and use gravimetric geoids for scientific and technical applications in geodesy, primarily in transforming ellipsoidal (GPS) heights into orthometric ones. The School provides a good opportunity to familiarize with the latest development in geoid determination, and to improve international contacts and collaborations among scientists dealing with gravity field modelling.
The School is structured in a way to be self-contained for any participant at graduate level with basic knowledge of geodesy. During a full week, theoretical lectures are followed by computer exercises based on the available software, according to the following general scheme:
ˇ introduction to physical geodesy and to collocation theory in geoid computation;
ˇ computation and use of high degree and ultra-high degree geopotential models;
ˇ geoid computation using Stokes integral;
ˇ terrain effects in geoid estimation;
ˇ FFT techniques in geodesy.
ˇ some seminars on specific topics (e.g. height datum unification).
In addition to the International Geoid School, ISG gives support to foreign institutions and scientists in the field of geoid computation, by organizing, on request, specific training courses on geoid computation held at Politecnico in Milan.
The most recent educational cooperations have been :
ˇ Support to the National Geophysical Research Institute of Hyderabad (India) in computing a gravimetric geoid in South India.
ˇ Training course on geoid computation procedures, held in June 2011, attended by three researchers of the Center of Geodesy and Geodynamics of Nigeria (Center of Geodesy and Geodynamics-National Space Research and Development Agency).
ˇ Local gravity model estimation over Bangladesh, based on GPS/leveling points locally collected, in cooperation with a researcher of the Survey of Bangladesh hosted at ISG in Milano, in February 2009, with individual training course.
ˇ Training course on geoid computation, held in November 2015, attended by two researchers of the Service of Surveying-National Institute of Cartography of Cameroon.
The International Association of Geodesy (IAG) holds its Scientific Assemblies traditionally midterm between two IUGG-IAG General Assemblies. The next one will be held middle of the General Assemblies 2015 (Prague, Czech Republic) and 2019 (Montreal, Canada) together with the International Association of Seismology and Physics of the Earth (IASPEI) in Kobe, Japan, from July 30 to August 4, 2017. There will be nine joint symposia of IAG and IASPEI, and seven IAG specific symposia. The titles are:
J01 Monitoring of the cryosphere
J02 Recent large and destructive earthquakes
J03 Deformation of the lithosphere: Integrating seismology and geodesy through modelling
J04 Geohazard early warning systems
J05 Crustal dynamics: Multidisciplinary approach to seismogenesis
J06 The spectrum of fault-zone deformation processes (from slow slip to earthquake)
J07 Tracking the sea floor in motion
J08 Imaging and interpreting lithospheric structures using seismic and geodetic approaches
J09 Geodesy and seismology general contributions
G01 Reference frames
G02 Static gravity field
G03 Time variable gravity field
G04 Earth rotation and geodynamics
G05 Multi-signal positioning: Theory and applications
G06 Geodetic remote sensing
G07 Global Geodetic Observing System (GGOS) and Earth monitoring services
Most important dates for contributions to the symposium are:
December 7, 2016: Abstract submission and registration open;
February 8, 2017: Deadline for abstract submission and travel support application;
April 5, 2017: Notification of acceptance;
May 10, 2017: Closure of early bird registration;
July 7, 2017: Closure of pre-registration.
All interested persons are invited to submit abstracts for oral presentations or posters. For more details of the assembly please visit the Homepage http://www.iag-iaspei-2017.jp.
Hermann Drewes, IAG Secretary General
11 15 September 2017
GFZ Helmholtz Centre, Potsdam, Germany
This autumn school, held in the historic surroundings of Telegrafenberg, Potsdam, will educate scientists and students in state of the art Satellite Gravimetry Applications, and prepare them for the usage of the products being developed within the framework of the EGSIEM project. Presentations from key members of the EGSIEM consortium will be augmented by high profile guests giving presentations on selected topics.
Topics covered will include:
Registration Deadline: 31st July 2017
Organisation of the autumn school is jointly managed by the EGSIEM project and GFZ
For more information please visit www.egsiem.eu/autumn-school
Planetary science is an interdisciplinary field across IUGG disciplines as well as geology, geochemistry, and astrobiology. The First IUGG Symposium on Planetary Science (IUGG-PS2017) Interdisciplinary observation and understanding of the Solar System will be held on 3-5 July 2017 in Berlin, Germany. The symposium aims to bring together international scientists and engineers focused on interdisciplinary work related to exploration and science of the solar system and seeking life beyond Earth. Topics include planetary geodesy, remote sensing, atmosphere, ionosphere/plasma physics, magnetic and gravity field, geomorphology, geophysics, geodynamics, geology, petrology, volcanology, geochemistry, interior physics, and life & astrobiology. More information will be available at http://www.dlr.de/iugg-ps2017. All of the IUGG community is welcome to attend the IUGG-PS2017.
Shuanggen Jin, Chair, IUGG Union Commission on Planetary Sciences
Source: The IUGG Electronic Journal Volume 17 No. 3 (1 March 2017)
April 3-7 , 2017, Rosario - Santa Fe, Argentina
April 23-28 , 2017, Vienna, Austria
April 24-28 , 2017, Nice, France
April 30 May 4 , 2017, Westford, MA, USA
May 9-12, 2017, Lausanne, Switzerland
May 15-19 , 2017, Gothenburg, Sweden
May 17 19, 2017, Wroclaw, Poland
May 20 25, 2017, Makuhari Messe, Chiba, Japan
May 22 24, 2017, London, United Kingom
May 29 June 2, 2017, Helsinki, Finland
June 21 23, 2017, Gdynia, Poland
June 22 25, 2017, Gdańsk, Poland
July 2 7, 2017, Washington, DC, USA
July 3 7, 2017, Paris, France
July 3 5, 2017, Berlin, Germany
July 10 12, 2017, Paris, France
July 10 14, 2017, New York, USA
July 30 August 4, 2017, Kobe, Japan
August 6-11, 2017, Singapore, Singapore
August 21-25, 2017, KTH, Stockholm
September 4-6, 2017, Brussels, Belgium
September 4-15, 2017, Longyearbyen, Svalbard-Spitzbergen, Norway
September 5-7, 2017, Reykjavik, Iceland
September 11-15, 2017, Potstdam, Germany
September 18-22, 2017, Jeju Island, South Korea
3rd Symposium of the Committee on Space Research (COSPAR): Small Satellites for Space Research
September 19-21, 2017, Bonn, Germany
September 25-27, 2017, University of Alicante, Spain
September 25-29, 2017, Portland, Oregon, USA
September 26-28, 2017, Berlin, Germany
October 4-7, 2017, Riga, Latvia
October 10-11, 2017, IHB, Monaco
October 16-18, 2017, Strasbourg, France
October 23-27, 2017, Miami, FL, USA
October 25-27, 2017, Valencia, Spain,
October 29 November 4, 2017, La Plata, Argentina
December 11-15, 2017, New Orleans, LA, USA
January 15-17 , 2018, Zurich, Switzerland
April 8-13 , 2018, Vienna, Austria
June 3-8, 2018, Hawaii, USA
June 3-8, 2018, Longyearbyen, Spitsbergen, Norway
July 14-22, 2018, Pasadena, CA, USA
August 20-31, 2018, Vienna, Austria
October 27-31, 2018, Canberra, Australia
December 10-14, 2018, Washington, D.C., USA
April 7-12 , 2019, Vienna, Austria
July 8 17, 2019, Montreal, Canada
July 28 August 2, 2019, Singapore, Singapore
This document has been provided by the Communicational and Outreach Branch of the International Association of Geodesy.