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

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

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

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

JPL Time Dependent Parameter (ASCII)
Ground-Based GNSS-based Upper Atmospheric Realtime Disaster Information and Alert Network (GUARDIAN) GLONASS daily accumulated real-time Precise Orbit Determination (POD) orbits (60-second sampling, 24-hour files) from NASA CDDIS 1 GPS, GROUND STATIONS 2023-10-01

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

JPL pos-GOA (ASCII)
Ground-Based GNSS-based Upper Atmospheric Realtime Disaster Information and Alert Network (GUARDIAN) GPS daily accumulated real-time Precise Orbit Determination (POD) Attitude Quaternions (30-second sampling, 24-hour files) from NASA CDDIS 1 GPS, GROUND STATIONS 2023-10-01

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

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

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

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

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

JPL Time Dependent Parameter (ASCII)
Ground-Based GNSS-based Upper Atmospheric Realtime Disaster Information and Alert Network (GUARDIAN) GPS daily accumulated real-time Precise Orbit Determination (POD) orbits (60-second sampling, 24-hour files) from NASA CDDIS 1 GPS, GROUND STATIONS 2023-10-01

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

JPL pos-GOA (ASCII)
Ground-Based Meteorological Data (daily, 24 hour files) from Co-Located Global Navigation Satellite System (GNSS) Receivers from NASA CDDIS 1 Beidou, Galileo, GLONASS, GPS, GROUND STATIONS, QZSS, IRNSS, SBAS Beidou P, Galileo P, GLONASS P, GPSP, GNSS RECEIVERS, QZSS P, IRNSS P, SBAS P 1992-01-01 to Present

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

RINEX
Ground-Based Meteorological Data (daily, 24 hour files) from Co-Located Ground-Based Global Navigation Satellite System GLONASS (GLObal NAvigation Satellite System) Receivers from NASA CDDIS 1 GLONASS, GROUND STATIONS GLONASS P, GNSS RECEIVER 1998-01-01 to Present

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

RINEX
Ground-Based Satellite Laser Ranging (SLR) Observation Data (full-rate, daily, 24 hour files) from NASA CDDIS 1 LAGEOS-1, LAGEOS-2, ETALON-1, ETALON-2, GROUND STATIONS, AJISAI, STARLETTE, STELLA, Galileo, GLONASS, Beidou, IRNSS, QZSS, LARES LASER REFLECTOR, SLR Station 1976-01-01 to Present

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

ILRS data format, CRD format
Ground-Based Satellite Laser Ranging (SLR) Observation Data (full-rate, monthly files) from NASA CDDIS 1 LAGEOS-1, LAGEOS-2, ETALON-1, ETALON-2, GROUND STATIONS, AJISAI, STARLETTE, STELLA, Galileo, GLONASS, Beidou, IRNSS, QZSS, LARES LASER REFLECTOR, SLR Station 1976-01-01 to Present

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

ILRS data format, CRD format
Ground-Based Satellite Laser Ranging (SLR) Observation Data (normal points, daily, 24 hour files) from NASA CDDIS 1 LAGEOS-1, LAGEOS-2, ETALON-1, ETALON-2, GROUND STATIONS, AJISAI, STARLETTE, STELLA, Galileo, GLONASS, Beidou, IRNSS, QZSS, LARES LASER REFLECTOR, SLR Station 2016-01-01 to Present

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

ILRS data format, CRD format
Ground-Based Satellite Laser Ranging (SLR) Observation Data (normal points, hourly files) from NASA CDDIS 1 LAGEOS-1, LAGEOS-2, ETALON-1, ETALON-2, GROUND STATIONS, AJISAI, STARLETTE, STELLA, Galileo, GLONASS, Beidou, IRNSS, QZSS, LARES LASER REFLECTOR, SLR Station 2010-01-01 to Present

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

ILRS data format, CRD format
Ground-Based Satellite Laser Ranging (SLR) Observation Data (normal points, monthly files) from NASA CDDIS 1 LAGEOS-1, LAGEOS-2, ETALON-1, ETALON-2, GROUND STATIONS, AJISAI, STARLETTE, STELLA, Galileo, GLONASS, Beidou, IRNSS, QZSS, LARES LASER REFLECTOR, SLR Station 1982-01-01 to Present

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

ILRS data format, CRD format
Ground-Based Satellite Laser Ranging (SLR) Observation Data Summary (normal points, monthly files) from NASA CDDIS 1 LAGEOS-1, LAGEOS-2, ETALON-1, ETALON-2, GROUND STATIONS, AJISAI, STARLETTE, STELLA, Galileo, GLONASS, Beidou, IRNSS, QZSS, LARES LASER REFLECTOR, SLR Station 1982-01-01 to Present

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

ILRS data format, CRD format
ILRS Satellite Laser Ranging (SLR) station, Greenbelt, Maryland (GODL) 1 GPS SLR Station 2025-07-01

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

CRD
International GNSS Service (IGS) GNSS site (ABMF00GLP), Les Abymes, Guadeloupe 1 GPS 2025-07-01

N: 16.7 S: 15.7 E: -61 W: -62

RINEX
International Laser Ranging Service (ILRS) extension of the International Terrestrial Reference Frame 2020 (ITRF2020) TRF Model with additional SLR sites from NASA CDDIS 1 SATELLITES 1976-05-01

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

SINEX
Lunar Orbiter Laser Altimeter (LOLA) one-way Laser Ranging Full Rate Data (all ranges collected, ground stations, aggregate of normal points daily) from NASA CDDIS 1 GROUND STATIONS ALTIMETERS 2009-07-01, 2014-09-01

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

Consolidated Laser Ranging Data Format (CRD) version 1
Multi-Global Navigation Satellite System (GNSS) 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, GNSS RECEIVER, QZSS P, IRNSS P, SBAS P 1992-01-01 to Present

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

RINEX
NOAA-20 VIIRS Level-1 Geolocation Data, version 2 2 NOAA-20 VIIRS 2017-11-29 to Present

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

netCDF-4
NOAA-21 VIIRS Level-1A Geolocation Data, version 1 1 NOAA-21 VIIRS 2022-11-10 to Present

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

netCDF-4
Satellite Laser Ranging Mail Exploder distributing general information about ILRS-related activities to the ILRS community. 1 SATELLITES 1983-01-01 to 2021-12-31

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

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
Satellite Laser Ranging (SLR) Data Handling File for the International Laser Ranging Service (ILRS) extension of the International Terrestrial Reference Frame 2020 (ITRF2020) TRF Model with additional SLR sites 1 SATELLITES 1976-05-01 to Present

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

SINEX
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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.

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