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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 Platforms Instruments Temporal Extent Spatial Extent Spatial Resolution Data Format
Ground-Based Global Navigation Satellite System (GNSS) Galileo real-time POD Orbits (60-second sampling, 60-second files) from NASA CDDIS 1 Galileo, GROUND STATIONS GNSS RECEIVER 2023-10-01

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

JPL pos-GOA (ASCII)
Satellite Laser Ranging (SLR) ILRS Combination Center (CC) Station Position and Earth Rotation Parameters (ERP) Product (weekly files, generated daily) from NASA CDDIS 1 LAGEOS-1, LAGEOS-2, ETALON-1, ETALON-2, GROUND STATIONS LASER REFLECTOR, SLR Station 1976-05-16 to Present

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

Software Independent Exchange (SINEX)
Satellite Laser Ranging products International Terrestrial Reference Frame (ITRF2020) Station Positions and Earth Orientation Parameters (EOP) Time Series (REPRO2020) from NASA CDDIS 1 SATELLITES 1983-01-01 to 2021-12-31

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 GNSS-based Upper Atmospheric Realtime Disaster Information and Alert Network (GUARDIAN) Galileo daily accumulated real-time Precise Orbit Determination (POD) Clock Corrections (60-second sampling, 24-hour files) from NASA CDDIS 1 Galileo, GROUND STATIONS GNSS RECEIVER 2023-10-01

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

JPL Time Dependent Parameter (ASCII)
Global Navigation Satellite System (GNSS) IGS Final Troposphere Zenith Path Delay (ZPD) Combination Product from NASA CDDIS 1 Beidou, Galileo, GLONASS, GPS, GROUND STATIONS, QZSS, IRNSS, SBAS Beidou P, Galileo P, GLONASS P, GPSP, GNSS, QZSS P, IRNSS P, SBAS P 2000-01-01 to Present

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

SINEX-TRO
Global Navigation Satellite System (GNSS) IGS Final Combined Orbit Solution Summary Product from NASA CDDIS 1 Beidou, Galileo, GLONASS, GPS, GROUND STATIONS, QZSS, IRNSS, SBAS Beidou P, Galileo P, GLONASS P, GPSP, GNSS, QZSS P, IRNSS P, SBAS P 1992-01-01 to Present

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

clock RINEX format
Ground-Based Global Navigation Satellite System (GNSS) GPS real-time POD Orbits (60-second sampling, 60-second files) from NASA CDDIS 1 GPS, GROUND STATIONS GNSS RECEIVER 2023-10-01

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

JPL pos-GOA (ASCII)
Very Long Baseline Interferometry (VLBI) Session Earth Orientation Parameter Series (EOP-S) Product from NASA CDDIS 1 GROUND STATIONS VLBI Station 2002-02-13 to 2023-12-11

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

EOP Transfer Format
Earth Orientation Parameters (EOP) products from the International Earth Rotation and Reference Systems Service (IERS) Rapid Service Prediction Center (RSPC) at the US Naval Observatory (USNO, updated sub-daily) from NASA CDDIS 1 SATELLITES VLBI, SLR, GPS, DORIS 1973-01-01 to Present

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

eop
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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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