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Geodetics Data Access and Tools

NASA has geodetics datasets that help researchers characterize the shape of Earth and the motion of its components. Access a range of data and data tools such as AppEEARS, Worldview, and Giovanni to make the most of geodetics data.

Geodetics Datasets

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Dataset Version Platform Instrument Temporal Extent Spatial Extent Spatial Resolution Data Format
Global Navigation Satellite System (GNSS) International Terrestrial Reference Frame (ITRF) 2020 products (IGS20) from NASA CDDIS 1 GPS 1983-01-01 to 2020-12-31

N: 90 S: -90 E: 180 W: -180

SINEX
Global Navigation Satellite System (GNSS) Predicted Ionosphere Products from NASA CDDIS 1 GLONASS, GPS, GROUND STATIONS GLONASS, GPS, GNSS 2008-01-01 to Present

N: 90 S: -90 E: 180 W: -180

IONEX (IONosphere map EXchange)
Global Navigation Satellite System (GNSS) Rapid Clocks Products from NASA CDDIS 1 GLONASS, GPS, GROUND STATIONS GLONASS, GPS, GNSS 2000-11-05 to Present

N: 90 S: -90 E: 180 W: -180

RINEX
Global Navigation Satellite System (GNSS) Rapid Orbit Products from NASA CDDIS 1 GLONASS, GPS GLONASS, GPS 1994-01-01 to Present

N: 90 S: -90 E: 180 W: -180

SP3 (Standard Product 3)
Global Navigation Satellite System (GNSS) Real-Time Clocks Products from NASA CDDIS 1 GLONASS, GPS, GROUND STATIONS GLONASS, GPS, GNSS 2008-10-05 to Present

N: 90 S: -90 E: 180 W: -180

IGS SSR
Global Navigation Satellite Systems (GNSS) Positions Products from NASA CDDIS 1 GLONASS, GPS, GROUND STATIONS GLONASS, GPS, GNSS 1992-06-14 to Present

N: 90 S: -90 E: 180 W: -180

SINEX
Global Navigation Satellite Systems (GNSS) Rapid Ionosphere Products from NASA CDDIS 1 GLONASS, GPS, GROUND STATIONS GLONASS, GPS, GNSS 2004-09-10 to Present

N: 90 S: -90 E: 180 W: -180

IONEX
Global Navigation Satellite Systems (GNSS) Real-Time Orbit Products from NASA CDDIS 1 GLONASS, GPS GPS, GLONASS 2008-10-05 to Present

N: 90 S: -90 E: 180 W: -180

RTCM SSR (State Space Representation)
Global Navigation Satellite Systems (GNSS) Troposphere Products from NASA CDDIS 1 GLONASS, GPS, GROUND STATIONS GLONASS, GPS 1997-01-26 to Present

N: 90 S: -90 E: 180 W: -180

SINEX_TRO
Global Navigation Satellite Systems (GNSS) Ultra-Rapid Orbit Products from NASA CDDIS 1 GLONASS, GPS GLONASS, GPS 2000-09-17 to Present

N: 90 S: -90 E: 180 W: -180

GRACE/GRACE-FO Level-4 Monthly Gravitational-Rotational-Deformation version 01 from NASA MEaSUREs HOMaGE 1.0 GRACE-FO, GRACE GRACE-FO MWI, GRACE INTERFEROMETER 2002-04-16 to Present

N: 90 S: -90 E: 180 W: -180

0.5 Decimal Degrees x 0.5 Decimal Degrees netCDF-4
Ground-Based Doppler Orbitography and Radiopositioning Integrated by Satellite (DORIS) Cumulative Station Position Product from NASA CDDIS 1 OSTM/JASON-2, GROUND STATIONS, CRYOSAT-2, Sentinel-3A, SARAL, HY2-A, JASON-3, ENVISAT, TOPEX/POSEIDON, JASON-1, SPOT-2, SPOT-3, SPOT-4, SPOT-5 DORIS, DORIS GROUND STATION BEACON 1992-01-01 to Present

N: 90 S: -90 E: 180 W: -180

SINEX
Ground-Based Doppler Orbitography and Radiopositioning Integrated by Satellite (DORIS) Extension of the International Terrestrial Reference Frame (ITRF) for Precise Orbit Determination (DPOD) from NASA CDDIS 1 OSTM/JASON-2, GROUND STATIONS, CRYOSAT-2, Sentinel-3A, SARAL, HY2-A, JASON-3, ENVISAT, TOPEX/POSEIDON, JASON-1, SPOT-2, SPOT-3, SPOT-4, SPOT-5 DORIS, DORIS GROUND STATION BEACON 1992-01-01 to Present

N: 90 S: -90 E: 180 W: -180

IDS internal DPOD format
Ground-Based Doppler Orbitography and Radiopositioning Integrated by Satellite (DORIS) IDS Coordinates of the Terrestrial Reference Frame (TRF) origin (Geocenter) Time Series Product from NASA CDDIS 1 OSTM/JASON-2, GROUND STATIONS, CRYOSAT-2, Sentinel-3A, SARAL, HY2-A, JASON-3, ENVISAT, TOPEX/POSEIDON, JASON-1, SPOT-2, SPOT-3, SPOT-4, SPOT-5, Sentinel-3B DORIS, DORIS GROUND STATION BEACON 1992-01-01 to Present

N: 90 S: -90 E: 180 W: -180

Geocenter
Ground-Based Doppler Orbitography and Radiopositioning Integrated by Satellite (DORIS) IDS Earth Orientation Parameters (EOP) Time Series Product from NASA CDDIS 1 GROUND-BASED OBSERVATIONS DORIS 1992-01-01 to Present

N: 90 S: -90 E: 180 W: -180

EOP
Ground-Based Doppler Orbitography and Radiopositioning Integrated by Satellite (DORIS) IDS Ionospheric Product from NASA CDDIS 1 GROUND STATIONS, ENVISAT, TOPEX/POSEIDON, JASON-1, SPOT-2, SPOT-4, SPOT-5, Sentinel-3B DORIS GROUND STATION BEACON, DORIS 1992-01-01 to Present

N: 90 S: -90 E: 180 W: -180

SINEX
Ground-Based Doppler Orbitography by Radiopositioning Integrated on Satellite (DORIS) Daily Data (raw files) from NASA CDDIS 1 OSTM/JASON-2, GROUND STATIONS, CRYOSAT-2, Sentinel-3A, SARAL, HY2-A, JASON-3 DORIS, DORIS GROUND STATION BEACON 1992-01-01 to Present

N: 90 S: -90 E: 180 W: -180

RINEX DORIS 3.0
Ground-Based Doppler Orbitography by Radiopositioning Integrated on Satellite (DORIS) IDS Global SINEX Station Position Time Series Product from NASA CDDIS 1 OSTM/JASON-2, GROUND STATIONS, CRYOSAT-2, Sentinel-3A, SARAL, HY2-A, JASON-3, ENVISAT, TOPEX/POSEIDON, JASON-1, SPOT-2, SPOT-3, SPOT-4, SPOT-5 DORIS, DORIS GROUND STATION BEACON 1992-01-01 to Present

N: 90 S: -90 E: 180 W: -180

IDS STCD (Station Coordinates Difference) format
Ground-Based Doppler Orbitography by Radiopositioning Integrated on Satellite (DORIS) IDS Satellite Orbit Product from NASA CDDIS 1 OSTM/JASON-2, GROUND STATIONS, CRYOSAT-2, Sentinel-3A, SARAL, HY2-A, JASON-3, ENVISAT, TOPEX/POSEIDON, JASON-1, SPOT-2, SPOT-3, SPOT-4, SPOT-5, Sentinel-3B DORIS, DORIS GROUND STATION BEACON 1992-01-01 to Present

N: 90 S: -90 E: 180 W: -180

SP1 or SP3 orbit format
Ground-Based Doppler Orbitography by Radiopositioning Integrated on Satellite (DORIS) IDS Station Coordinates Product from NASA CDDIS 1 SPOT-2, SPOT-3, SPOT-4, SPOT-5, JASON-1, TOPEX/POSEIDON, CRYOSAT-2, GROUND STATIONS, HY2-A, OSTM/JASON-2 DORIS 1990-03-31 to Present

N: 90 S: -90 E: 180 W: -180

DORIS Station Coordinate Difference (STCD) format
Ground-Based Doppler Orbitography by Radiopositioning Integrated on Satellite (DORIS) IDS Weekly Station Position Product from NASA CDDIS 1 OSTM/JASON-2, GROUND STATIONS, CRYOSAT-2, Sentinel-3A, SARAL, HY2-A, JASON-3, ENVISAT, TOPEX/POSEIDON, JASON-1, SPOT-2, SPOT-3, SPOT-4, SPOT-5 DORIS, DORIS GROUND STATION BEACON 1992-01-01 to Present

N: 90 S: -90 E: 180 W: -180

SINEX
Ground-Based Doppler Orbitography by Radiopositioning Integrated on Satellite (DORIS) Multi-Day Data (preprocessed files) from NASA CDDIS 1 JASON-1, OSTM/JASON-2, SPOT-2, SPOT-3, GROUND STATIONS, SPOT-4, SPOT-5, CRYOSAT-2, ENVISAT, TOPEX/POSEIDON, SARAL, HY2-A, Sentinel-3B DORIS, DORIS GROUND STATION BEACON 1992-01-01 to Present

N: 90 S: -90 E: 180 W: -180

DORIS 2.2
Ground-Based Doppler Orbitography by Radiopositioning Integrated on Satellite (DORIS) Quaternions products from NASA CDDIS 1 GEODYNAMIC STATIONS 2001-04-30 to Present

N: 90 S: -90 E: 180 W: -180

ASCII
Ground-Based Global Navigation Satellite System Combined Broadcast Ephemeris Data (daily files) from NASA CDDIS 1 Beidou, Galileo, GLONASS, GPS, GROUND STATIONS, QZSS, IRNSS, SBAS Beidou P, Galileo P, GLONASS P, GPSP, GLONASS RECEIVERS, QZSS P, IRNSS P, SBAS P 1992-01-01 to Present

N: 90 S: -90 E: 180 W: -180

RINEX
Ground-Based Global Navigation Satellite System Data (30-second sampling, 1 hour files) from NASA CDDIS 1 Beidou, Galileo, GLONASS, GPS, GROUND STATIONS, QZSS, IRNSS Beidou RECEIVERS, Galileo RECEIVERS, GLONASS RECEIVERS, GPS RECEIVERS, GNSS RECEIVER, QZSS RECEIVERS, IRNSS RECEIVERS 2005-10-07 to Present

N: 90 S: -90 E: 180 W: -180

RINEX
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Featured Geodetics Observation Method: GNSS

A Global Navigation Satellite System (GNSS) is a space geodesy technology that provides autonomous geospatial positioning around the world. One such system is the U.S. Global Positioning System (GPS), which is made up of 24 satellites, each traveling in a 12-hour orbit. A similar system is the GLObal NAvigation Satellite System (GLONASS) constellation consisting of 24 satellites. Each system is designed so that multiple satellites are within range of any point on Earth in order to precisely determine its location. GNSS data can used to determine location and positioning around Earth as well as to study geophysics, the motions of tectonic plates and their displacements due to earthquakes, Earth orientation, and atmospheric properties among many other things.

Learn More About GNSS
image collage of satellite data images of Earth

GNSS Radio Occultation Science and Applications

Join us to learn more about Global Navigation Satellite System (GNSS) radio occultation science and applications! We will highlight science impacts in the areas of numerical weather prediction, forecasting cyclone genesis, and space weather.
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RINEX V3 GNSS Data Now Available at CDDIS

This update to NASA's Crustal Dynamics Data Information System (CDDIS) archive makes accessing all RINEX data easier and more transparent for the Global Navigation Satellite System (GNSS) user community.

Geodetics Data Tools

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