Geodesy schedule for the AGU 2016 Fall Meeting Posted
November 18, 2016

The #Geodesy schedule for @theAGU #FallMeeting has been posted, with many presentations and posters from IGS members. Please visit the AGU schedule page for more information:

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IGS Workshop 2017 - Paris, France July 3-7, 2017
September 8, 2016

Please save the dates for the next IGS Workshop to be hosted by the Institut National de l’Information Géographique et Forestière (IGN) in Paris, France, July 3-7, 2017.

Information will be posted plans develop.

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CFP: GNSS Performance Monitoring IGMA-IGS Joint Trial Project
August 24, 2016

The GNSS Performance Monitoring IGMA-IGS Joint Trial Project is a joint activity of GNSS Providers and the IGS being organized through the UNOOSA/International Committee on GNSS. The Project is aimed at creating an authoritative international GNSS monitoring and assessment system with results trusted by all parties and worldwide. IGS participation within the Joint Trial Project is being solicited through this Call for Participation.

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Disaster Management and Recovery Framework
August 6, 2016

Watch the video presentation of Disaster Management & Recovery Framework: The Surveyors Response presented by Greg Scott at the 78th Fig Working Week in 2016 about how United Nations Geo-response to disaster management. The impact on and the challenges ahead for the surveying and geospatial professional.

Greg Scott leads the Secretariat for the United Nations Committee of Experts on Global Geospatial Information Management (UN-GGIM), providing strategic policy advice and leadership in the coordination and implementation of UN-GGIM initiatives with Member States and related International Organizations involved in national, regional and global geospatial information management.

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IGS Technical Report 2015
June 29, 2016

Applications of the Global Navigation Satellite Systems (GNSS) to Earth Sciences are numerous. The International GNSS Service (IGS), a voluntary federation of government agencies, universities and research institutions, combines GNSS resources and expertise to provide the highest–quality GNSS data, products, and services in order to support high–precision applications for GNSS–related research and engineering activities.

This IGS Technical Report 2015 includes contributions from the IGS Governing Board, the Central Bureau, Analysis Centers, Data Centers, station and network operators, working groups, pilot projects, and others highlighting status and important activities, changes and results that took place and were achieved during 2015.

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CFP GNSS Augmentation to the Tsunami Early Warning System
April 17, 2016

This is a Call for Participation to research scientists, geodetic research groups and national agencies in support of the implementation of the recommended Global Navigation Satellite System (GNSS) Augmentation to Tsunami Early Warning Systems (GATEW). The call seeks to establish a working group to be a catalyst and motivating force for the definition of requirements, identification of resources, and for the encouragement of international cooperation in the establishment, advancement, and utilization of GNSS for Tsunami Early Warning.

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Workshop 2016 Plenary and Posters Available
March 24, 2016

All the #igsworkshop2016 plenary video presentations with their slides are now available at IGS Presents.

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Properly Naming your Rinex 3 files
January 27, 2016

To all station data providers currently providing Rinex 3 files as part of the IGS network. Please at your earliest convenience implement the correct naming scheme for your Rinex 3 files as the old Rinex 2 names for Rinex 3 files are no longer appropriate.

Enclosed in the pdf is a set of recommendations that you may findEnclosed in the pdf is a set of recommendations that you may find useful, but many different organizations have implemented their own renaming methods, and some vendors already allow correct naming of Rinex 3 files but clearly not all so some action from Station Operators is needed.

The Rinex 3 format clearly defines the new naming structure:

To find your “IGS station long name” go to click on “options” , and in the first column “Site” select the checkbox “Long Name” to show the name expected by the IGS for all stations. If you disagree with the country code in the Long Name assignment please inform us quickly so as to avoid confusion, for now all stations have “00” for receiver and antenna.

Again this affects only Rinex 3 Station Data Providers (previously “MGEX stations”, now called “multi-GNSS stations”) .

The data files acceptable for the IGS continues to be; Daily (30sec), Hourly (30 sec) and Highrate (1sec) 15 min files. The “expected” name is assumed, if you have doubts please let us know. If you base your long name on the current filenames you are delivering as part of “mgex” then the name will be fine. Rinex 3 filenames are very flexible for the benefit of the entire GNSS community, but the IGS will not be taking advantage of that full flexibility.

RINEX 3 file deliveries with the old names can be discontinued if you want, once you have implemented the new filenames, but they will continue to be accepted in parallel for six months if you want to continue to submit them and will be stored as always in the /mgex campaign directories in the different IGS Data Centers. RINEX 3 files with the correct long names will be merged into the regular IGS GNSS data repository together with the Rinex 2 data, and you can see them in there since the start of 2016.

Rinex 2 files with their standard names can be submitted in parallel to Rinex 3 files for as long as you want, as they may serve different communities, all RINEX files will now be stored together for easier access and “discoverability” by all GNSS data users.

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ITRF 2014 Now Available
January 21, 2016

The ITRS Center at IGN has the pleasure to announce to the community theavailability of the ITRF2014 solution at the dedicated web site:

I want to take this opportunity to acknowledge the enormous efforts of theTechnique Services (IVS, ILRS, IGS, IDS) and their Analysis and CombinationCenters for their contributions by providing reprocessed solutions.The quality of the ITRF2014 is certainly benefiting from these techniqueimproved solutions. Many thanks to a number of institutions and individualsfor their contributions to the ITRF2014 project.I want also to acknowledge the contribution of DGFI and JPL colleagues, aswell as my colleagues at the ITRS Center: IGN Geodetic Research Laboratory(LAREG) and IGN Survey Department (SGN).

The ITRF2014 web site contains the most important results and informationregarding the ITRF2014 combination. It will be updated regularly to add moredetails and results useful to the ITRF users.

For any comment, question or specific request, please contact:itrf at


Zuheir Altamimi

Head, ITRS Center

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IGS ACC Transition to GA/MIT
January 14, 2016

On Thursday January 14, 2016, the role and operational data processing for the IGS Analysis Center Coordinator (ACC) will transition from NOAA/NGS to a combined role for Geosciences Australia (GA) and MIT. The operational data processing to generate the IGS ultrarapid, rapid, and final orbit and clock products will be carried in a cloud computing environment sponsored by GA. The operational oversight of product quality and generation will be split between GA and MIT depending on time day. The new system has been running in parallel for the past two months and has been generating results that are fully consistent with the NOAA/NGS operational processing.

For users and analysis centers, there should be no apparent changes after the transition. All the products are available from and deposited to the same locations as currently. While it is expected that the transition should happen transparently, there could be some delays as the new team works through any problems that do arise. Kevin Choi at NOAA/NGS has graciously agreed to continue his assistance during the transition and the new team is very thankful for this.

Finally the GA/MIT team would like to thank the NOAA/NGS team for the tireless efforts over the last 8 years as IGS ACC. The efforts of Jim Ray, Jake Griffins and Kevin Choi are very appreciated.

Questions can be sent to acc at

Complaints can be sent to Gary.Johnston at

(just kidding, won’t be in message).

GA/MIT Team, Michael Moore, Guorong Hu, Mike Floyd, Tom Herring.


2015 Technical Report Contributions Due
November 16, 2015

We appreciate your interest and valuable contributions to the reportagain. The next report, IGS Technical Report 2015, is scheduled to be published at the beginning of 2016.

The deadline for submissions is January 31, 2016.

In agreement with the previous IGS Technical Reports, the issue for 2015 must contain contributions from the main components of the IGS, namely global analysis centers (ultra rapid, rapid and final products), the global data centers, the working groups, and the pilot projects.

Contributions from associated analysis centers, regional data centers, and other IGS related organizations are welcome as well.


2016 Workshop Registration Open
October 6, 2015

The website for the 2016 IGS Workshop is now live:

Registration is now open and includes an early bird discount rate for registrations before January 1, 2016. Registration includes admission to the Wednesday night dinner and a cruise on Sydney Harbour. A skeleton program has been drafted and information on how to submit an abstract for both oral and poster sessions is available. It is advised that attendees apply for Visa’s as early as possible, information is available on the website. If you have any questions or would like further information, please contact the local organizing committee by emailing


Guide to Using IGS Products Updated
September 17, 2015

Since 1994, the International GNSS Service (IGS) has provided precise GPS orbit products to the scientific community with increased precision and timeliness. Many national geodetic agencies and GNSS (Global Navigation Satellite System) users interested in geodetic positioning have adopted the IGS precise orbits to achieve centimeter level accuracy and ensure long-term reference frame stability. Relative positioning approaches that require the combination of observations from a minimum of two GNSS receivers, with at least one occupying a station with known coordinates are commonly used. The user position can then be estimated relative to one or multiple reference stations, using differenced carrier phase observations and a baseline or network estimation approach. Differencing observations is a popular way to eliminate common GNSS satellite and receiver clock errors. Baseline or network processing is effective in connecting the user position to the coordinates of the reference stations while the precise orbit virtually eliminates the errors introduced by the GNSS space segment. One drawback is the practical constraint imposed by the requirement that simultaneous observations be made at reference stations. An alternative post-processing approach uses un-differenced dual-frequency pseudorange and carrier phase observations along with IGS precise orbit products, for stand-alone precise geodetic point positioning (static or kinematic) with centimeter precision. This is possible if one takes advantage of the satellite clock estimates available with the satellite coordinates in the IGS precise orbit/clock products and models systematic effects that cause centimeter variations in the satellite to user range. Furthermore, station tropospheric zenith path delays with mm precision and GNSS receiver clock estimates precise to 0.03 nanosecond are also obtained. To achieve the highest accuracy and consistency, users must also implement the GNSS-specific conventions and models adopted by the IGS. This paper describes both post-processing approaches, summarizes the adjustment procedure and specifies the Earth and space based models and conventions that must be implemented to achieve mm-cm level positioning, tropospheric zenith path delay and clock solutions.


Release of RINEX Version 3.03
August 5, 2015

The IGS and RTCM-SC104, RINEX Working Group would like to announce the release of RINEX 3.03. Major RINEX 3.03 Changes: Added the Indian Regional Navigation Satellite System (IRNSS). Updated the IONOSPHERIC CORR record format and specification. Updated the LEAP SECONDS record format and specification. Updated the TIME SYSTEM CORR record format and specification. Changed the BeiDou B1 observation codes back to the RINEX 3.01 convention. Clarified the GPS Navigation message fit interval (time period in hours). Clarified the QZSS Navigation message fit interval (a flag (0/1)). Updated the document to more clearly indicate that only known tracking modes are supported in SYS/#/OBS TYPES records and RINEX 3.03. Updated Section 8.3.2 and Appendix A8 BROADCAST ORBIT-5 to clarify the use of the Issue of Data(IOD) parameter in I/NAV and F/NAV messages. Added several sample data formats to the Appendix. Updated text to allow unknown GLONASS COD/PHS/BIS message definition. Clarified that the GLONASS SLOT / FRQ# message is mandatory


Multi GNSS Antenna Phase Center Model Introduced
July 21, 2015

43 MGEX Stations Added to IGS Network
July 15, 2015

2014 IGS Technical Report
May 15, 2015

2015 Strategic Implementation Plan
January 1, 2015

Gary Johnston of Geoscience Australia elected Chair of IGS Governing Board
December 22, 2014

IGS 2013 Progress Dashboard
October 7, 2014

2014 Workshop Compendium
July 13, 2014

The IGS is pleased to announce upcoming IGS Workshop – Celebrating 20 Years of Service. This five-day workshop will bring scientists, engineers, and geodesists from all over the world to the campus of California Institute of Technology (Caltech) at 1200 E California Blvd, Pasadena, California 91125, United States for a week of presentations, discussions, and meetings. The workshop will be composed of plenary sessions with invited oral presentations, three poster sessions, and numerous working group splinter meetings, multiple splinter meetings, and other noteworthy events.


Second IGS Reprocessing Campaign (Repro2)
May 30, 2014

2014 Strategic Implementation Plan
May 21, 2014

IGS MGEX Introduced
April 23, 2014

With four new and emerging constellations (BeiDou, Galileo, QZSS, IRNSS) as well as the ongoing modernization of the U.S. Global Positioning System and Russia’s GLONASS, the world of satellite navigation is undergoing dramatic changes. Facing these challenges, the International GNSS Service has initiated the Multi-GNSS Experiment to enable an early familiarization with the new systems and to prepare their incorporation into high-precision GNSS modeling and analysis. This article reports on the status of the new constellations and the MGEX project and describes initial data products and recent results for individual systems.


IGS Strategic Plan 2013-1016
February 21, 2014

IGS becomes a Network Member of ICSU World Data System
January 23, 2014

IGS 2012 Workshop Recommendations
July 13, 2013

IGS Progress Report
April 23, 2013

IGS Real-Time Services
April 1, 2013

The International GNSS Service (IGS) has ensured the availability of open access, high-quality GNSS data products since 1994. These products enable access to the definitive global reference frame for scientific, educational, and commercial applications – a tremendous benefit to the public.

Through the Real-time Service (RTS), the IGS extends its capability to support applications requiring real-time access to IGS products. RTS is a GNSS orbit and clock correction service that enables precise point positioning (PPP) and related applications, such as time synchronization and disaster monitoring, at worldwide scales. RTS is based on the IGS global infrastructure of network stations, data centers and analysis centers that provide world standard high-precision GNSS data products.

The RTS is currently offered as a GPS-only beta service for the development and testing of applications. The Russian GLONASS is initially provided as an experimental product and will be included within the service when the RTS reaches its full operating capability at the end of 2015. Other GNSS constellations will be added as they become available.

This service is made possible through partnerships with Natural Resources Canada (NRCan), the German Federal Agency for Cartography and Geodesy (BKG), and the European Space Agency’s Space Operations Centre in Darmstadt, Germany (ESA/ESOC). Support is provided by 160 station operators, multiple data centers, and 10 analysis centers around the world.

The RTS is operated by the IGS as a public service. Users are offered open and readily available access through subscription.


IGS 2012 Technical Report
April 1, 2013

IGS Site Guidelines
April 1, 2013

IGS Director Ruth Neilan receives Levallois Medal by the IAG Past President Gerhard Beutler
September 6, 2012

IGS Director Ruth Neilan receives Levallois Medal by the IAG Past President Gerhard Beutler.


Guidelines for IGS Technical Report 2012
September 1, 2012

2012 IGS Workshop
July 1, 2012

2012 IGS Strategic Implementation Plan
July 1, 2012

2011 IGS Technical Report
July 1, 2012

Welcome to IGS Presents
April 9, 2012

Welcome to IGS Presents. Videos. Presentations. Posters. Images. Exclusive content by leaders of the community.


PPP-RTK & Open Standards Symposion and Workshop
March 1, 2012

IGS Workshop on GNSS Biases 2012
October 1, 2011

IGS Central Bureau is now an NTRIP Caster!
October 1, 2011

IGS M-GEX Response Form
October 1, 2011

IGS M-GEX - Call for Participation - New Information
October 1, 2011

2012 IGS Workshop - 1st announcement
September 1, 2011
On behalf of the local organising committee I would like to give you advance notice of the IGS AC Workshop 2012 to be held July 23-27, 2012 at the University of Warmia and Mazury (UWM) in Olsztyn, Poland. The meeting will hosted by the Department of Astronomy and Geodynamics of UWM, with the local organizing committee led by Andrzej Krankowski (kand at Shailen Desai (shailen.d.desai at; JPL) will serve as scientific programme organiser for the workshop. Please reserve these dates on your calendar so that we have a well-attended and productive workshop. A web site providing details about the workshop will be available in September.  If you have any comments or suggestions on the scientific content or organisation aspects of the workshop please contact Shailen or Andrzej, respectively. We look forward to seeing you in Olsztyn! - Andrzej Krankowski  

IGS08 Realization adopted
April 1, 2011

IGS Strategic Implementation Plan - 2011
March 1, 2011

IGS 2010 Workshop Presentation Videos
June 1, 2010

IGS 2010 Workshop Presentation Photos
June 1, 2010

IGS Workshop, 28 Jun - 2 July, Newcastle upon Tyne, Englane
June 1, 2010

IGS Strategic Plan - 2010
June 1, 2010

IGS Workshop 2010 Announced
February 12, 2010

The 2010 workshop of the International GNSS Service (IGS) will be held at Newcastle upon Tyne (UK) 28 June - 1 July, followed on 2 July by a one-day symposium on vertical rates from GNSS. Please consult the website for the IGS Workshop programme, registration form and abstract submissions. Travel information and accommodation booking is also provided.The workshop is open to the entire community and will feature invited talks, posters, and splinter meetings on a full range of issues important to IGS activities: monumentation, station integrity, data transmission and storage, analysis center activities, antenna and receiver calibrations, troposphere and ionosphere modeling and products, modeling of station and satellite motions, and requirements for new applications. See igsmail for details


New Reference Frame Coordinator
February 1, 2010

Multi-GNSS Asia - 25-26 January 2010, Sofitel Centara Hotel, Bangkok, Thailand
October 1, 2009

IGS Guidelines Updated
October 1, 2009

IGS Infrastructure Committee introduced
September 1, 2009

Third Meeting of the International Committee on GNSS - ICG 3
December 1, 2008

AGU Fall Meeting 15-19 December, San Francisco, CA, USA
December 1, 2008

IGS Workshop 2-6 June, Miami Beach, Florida, USA
June 1, 2008

Photo Gallary Added
June 1, 2008

Real Time Pilot Project Call for Participation issued
June 1, 2007

A one-page printable information sheet is available in the publications area
May 1, 2006

IGS Workshop 8-12 May, Darmstadt
March 10, 2006

Information on the change to spec format for IGS orbits
January 25, 2006

IGSMail announcement
October 21, 2005

CFP in the Unification of African Reference Frames - ‘Project AFREF’ avialble
October 21, 2005

The Call for Participation in the Unification of African Reference Frames - ‘Project AFREF’ - is available


The IGS FAQ has been extensively revised
June 1, 2005

IGS now officially stands for the International GNSS Service
March 17, 2005

The IGS Terms of Reference and several Policy and Charter documents have been updated. IGS now officially stands for the International GNSS Service. This change reflects the IGS’ incorporation of GLONASS, and interest in future GNSS such as Galileo.


Performance analysis summary of determiningthe GPS satellites’ orbits
January 13, 2005

A summary of how well the most recent IGS analysis was able to determine the GPS satellites’ orbits is available.


Overlapping period of orbits in sp3 and sp3c formats provided until September 2005
November 8, 2004

The overlap period during which the IGS will provide orbits in sp3 and sp3c formats will continue until September, 2005. After that, IGS orbits will be provided in sp3c format. Update your software accordingly! More information and links to the format specifications are available here


2001-02 Annual Report available
October 5, 2004

Information on switch to sp3c updated
August 30, 2004

IGSStation mailing list split off from IGSMail. See IGSMail 4921
April 14, 2004

IGS Site Guidelines and new site Checklist available
April 14, 2004

IGS Site Guidelines and new site Checklist, available via the network page reflect the new IGSStation list.


The Proceedings of the 2002 Ottawa “Towards Real-Time” workshop is now available electronically
November 10, 2003

A description of different types of monuments, their design and implementation are now available
February 21, 2003

IGS Final orbit recent usage products available
December 4, 2002

Recent usage in IGS Final orbit products is noted at the bottom of the individual site pages accessible from the station list or clickable maps.


Maps of stations with GPS/GLONASS tracking are available
December 4, 2002

Maps of stations with GPS/GLONASS tracking are available The station list denotes which stations are new, Global, hourly, or IGLOS (GPS/GLONASS)


Several improvements have been made to the Tracking Network area recently
December 4, 2002

A summary of evolving IGS data and metadata formats is available
October 30, 2002

2000 Technical and Annual Reports and Strategic Plan aviable
June 27, 2002

The 2000 IGS Technical Reports, 2000 IGS Annual Report, and Strategic Plan have recently been made available in PDF format.


IGS Products will be based on ITRF2000 as of 2 December 2001
November 20, 2001

IGS Products will be based on ITRF2000 as of 2 December 2001 (GPS week 1143). Please see the IGSMail announcement for more details.


Ottawa Workshop for Oct, 2001 postponed
October 2, 2001

The Ottawa Workshop scheduled for Oct, 2001 has been postponed. Information on rescheduling will follow.


TIGA Pilot Project page is up. Call for Participation is available
June 30, 2001

IGS Workshop to be held October 15 - 18, 2001, in Ottawa, Canada
May 30, 2001

Our Calendar reflects the IGS Workshop to be held October 15 - 18, 2001, in Ottawa, Canada.


IGS products table summarized revised
May 23, 2001

The current accuracies, latencies, and sample intervals of the IGS products are nicely summarized in a revised table.


IGS LEO Pilot Project Meeting appears with other 2001 meetings
January 4, 2001

Calendar Updated
January 4, 2001

ION GPS 2000 Meeting to include concurrent IGS Usre Forum
August 14, 2000

IGS User Forum to be held September 20 in Salt Lake City (in conjunction with the ION GPS 2000 Meeting).


CB in south Africa
June 30, 2000

We have a few pictures of the CB working hard during a trip to South Africa.


GLONASS Experiment The 1998 Report on the is available now
June 28, 2000

CBIS www and ftp usage statistics using Webalizer
June 21, 2000

CBIS www and ftp usage statistics dating back to 1995 are available, thanks to a package called the Webalizer.


IGLOS Pilot Project page is up. Call for Participation is available
May 25, 2000

IGLOS Mail and IGEX Mail
May 25, 2000

Developing Network Workshop 2000 agenda available - Preregister by 15 May
May 3, 2000

Developing Network Workshop 2000 agenda available Preregister by 15 May!!! Main page is


The 1998 IGS Technical Reports
April 17, 2000

98 IGS Annual Report
February 10, 2000

Proceedings of 98 Network Workshop avaiable
February 10, 2000

2000 IGS AC Workshop is available. Please see the Calendar
February 10, 2000

2000 Calendar available
January 21, 2000

2000 Calendar available


LEO Call for Participation available
January 12, 2000

First Announcement of IGS Network Workshop 2000 available
October 14, 1999

Please include the IGS logo and citation in all websites, presentations, publications, or posters that use IGS data, products, or services. IGS is a service of IAG.