Reference Systems

The International Committee on Global Navigation Satellite Systems (ICG) noted a proposal to establish links with national and regional authorities and relevant international organizations, particularly in developing countries. A working group will be established to develop a strategy for support of regional reference systems.

African Geodetic Reference Frame (AFREF):http://geoinfo.uneca.org/afref/
Asia and Pacific Regional Geodetic Project (APRGP):http://www.sbsm.gov.cn/pcgiap/98wg/98wg1/aprgp_analysis/aprgp_analysis.htm
European Position Determination System (EUPOS):http://www.eupos.org
IAG Reference Frame Sub-Commission for Europe (EUREF)http://www.euref.eu orhttp://www.euref-iag.net
Geocentric Reference System for the Americas (SIRGAS):www.sirgas.org

UN-GGIM: Subcommittee on Geodesy - Global Survey on Geodetic Reference Frame Competency

Website (External Link):https://bit.ly/3fyNBRT

Policy Briefs

ICG WG D "Reference Frames, Timing and Applications" Policy Brief:Natural Hazards Monitoring using Global Navigation Satellite Systems

Templates on Geodetic and Timing References

Global Navigation Satellite Systems Timescale Descriptions

Global Positioning System (GPS):GPS Time
GLObal NAvigation Satellite System (GLONASS):GLONASS Time
GALILEO (satellite navigation):Galileo System Time (GST) - as of January 2016
BeiDou Navigation Satellite System (BDS):BeiDou System Time - as of November 2016

Regional Navigation Satellite System/Satellite-based Augmentation System Timescale Descriptions

Quazi Zenith Satellite System (QZSS):QZSS Time - as of November 2016
European Geostationary Navigation Overlay (EGNOS):SBAS Timescale Description
Navigation with Indian Constellation (NavIC) or Indian Regional Navigation Satellite System (IRNSS):RNSS Timescale Description

IGS Timescale Description

International GNSS Service (IGS):IGS Time V1.0

Global Navigation Satellite Systems Reference Frames Descriptions

National Geospatial-Intelligence Agency:World Geodetic System 1984 (WGS84)
Global Geocentric Coordinate System of the Russian Federation:Earth Parameters (PZ-90) - " Parametry Zemli 1990" (updated as of 2018)
National Bureau of Surveying and Geo-information :China Terrestrial Reference Frame 2000 (CTRF2000)
European Space Agency (ESA):Galileo Terrestrial Reference Frame (GTRF)
Reference System Description of QZSS:Japan satellite navigation Geodetic System (JGS)
International Earth Rotation and Reference Systems Service (IERS):International Terrestrial Reference System (ITRS)
International Earth Rotation and Reference Systems Service (IERS): International Terrestrial Reference Frame (ITRF)

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United NationsOffice for Outer Space Affairs

Reference Systems

UN-GGIM: Subcommittee on Geodesy - Global Survey on Geodetic Reference Frame Competency

Policy Briefs

Templates on Geodetic and Timing References

Global Navigation Satellite Systems Timescale Descriptions

Regional Navigation Satellite System/Satellite-based Augmentation System Timescale Descriptions

IGS Timescale Description

Global Navigation Satellite Systems Reference Frames Descriptions

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