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CDDIS Data Access and Tools

Explore datasets archived by NASA's Crustal Dynamics Data Information System (CDDIS) and learn more about relevant data tools. 

For a complete list of datasets and tools, visit the CDDIS website.

To access the CDDIS data archive, visit the Archive Access page for details about how to use https or ftp-ssl access protocols. Visit the Archive Search page for instructions on how to customize search queries using the Earthdata Search API.

CDDIS Data Tools

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Tool Description Services
GUARDIAN The GNSS-based Upper Atmospheric Realtime Disaster Information and Alert Network (GUARDIAN) is a near real-time (NRT) ionospheric monitoring tool for natural hazards warning. Monitoring Natural Events
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Datasets

Data at CDDIS

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Dataset Platform Data Format DOI
Global Navigation Satellite System (GNSS) IGS Final Combined Station Positions/Velocities Product from NASA CDDIS Beidou, Galileo, GLONASS, GPS, GROUND STATIONS, QZSS, IRNSS, SBAS SINEX, UNIX compressed ASCII https://doi.org/10.5067/GNSS/GNSS_IGSSNX_001
Ground-Based Global Navigation Satellite System (GNSS) Galileo real-time POD Clock Corrections (60-second sampling, 60-second files) from NASA CDDIS Galileo, GROUND STATIONS JPL TimeDependentParameter (ASCII)
Ground-Based Global Navigation Satellite System (GNSS) Observation Summary Data (30-second sampling, daily files), output of TEQC (translation, editing, and quality check) from NASA CDDIS Beidou, Galileo, GLONASS, GPS, GROUND STATIONS, QZSS, IRNSS, SBAS RINEX https://doi.org/10.5067/GNSS/GNSS_DAILY_S_001
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 GPS, GROUND STATIONS JPL Time Dependent Parameter (ASCII) https://doi.org/10.5067/GNSS/GDGPS_daily_acc_POD_1sec_clk_corr_gps_001
Very Long Baseline Interferometry (VLBI) Data and Products Supporting Information from NASA CDDIS GROUND STATIONS
General Archive Information from NASA CDDIS GROUND STATIONS
Global Navigation Satellite System (GNSS) IGS Final Station Position Residuals Between the Analysis Center (AC) Solutions and the Cumulative Combined Solution Product from NASA CDDIS Beidou, Galileo, GLONASS, GPS, GROUND STATIONS, QZSS, IRNSS, SBAS Text, UNIX compressed ASCII https://doi.org/10.5067/GNSS/GNSS_IGSCRES_001
Ground-Based Global Navigation Satellite System (GNSS) GLONASS Broadcast Ephemeris Data (30-second sampling, hourly files) from NASA CDDIS GLONASS, GROUND STATIONS RINEX https://doi.org/10.5067/GNSS/GNSS_HOURLY_G_001
Ground-Based Global Navigation Satellite System (GNSS) Satellite-Based Augmentation System (SBAS) Broadcast Ephemeris Data (daily files) from NASA CDDIS SBAS, GROUND STATIONS RINEX https://doi.org/10.5067/GNSS/GNSS_DAILY_H_001
Ground-Based Satellite Laser Ranging (SLR) Observation Data (full-rate, daily, 24 hour files) from NASA CDDIS LAGEOS-1, LAGEOS-2, ETALON-1, ETALON-2, GROUND STATIONS, AJISAI, STARLETTE, STELLA, Galileo, GLONASS, Beidou, IRNSS, QZSS, LARES ILRS data format, CRD format https://doi.org/10.5067/slr/slr_data_daily_fr_001
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