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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
Ground-Based Global Navigation Satellite System (GNSS) GLONASS real-time POD Clock Corrections (60-second sampling, 60-second files) from NASA CDDIS GLONASS, GROUND STATIONS JPL TimeDependentParameter (ASCII)
Ground-Based Global Navigation Satellite System (GNSS)-based Upper Atmospheric Realtime Disaster Information and Alert Network (GUARDIAN) GLONASS daily antenna phase centers (24-hour files) from NASA CDDIS GLONASS, GROUND STATIONS JPL Piecewise Constant Model Parameter (ASCII) https://doi.org/10.5067/GNSS/GDGPS_ant_phase_center_glo_001
Ground-Based Satellite Laser Ranging (SLR) Observation Data Summary (normal points, monthly 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_MONTHLYSUM_NPT_001
GNSS GLONASS Combined Broadcast Ephemeris Data (30-second sampling, daily files) from NASA CDDIS GLONASS, GROUND STATIONS RINEX https://doi.org/10.5067/GNSS/GLONASS_DAILY_B_001
Global Navigation Satellite System (GNSS) IGS Rapid Combined Orbit Solution (daily files, generated daily) Product from NASA CDDIS Beidou, Galileo, GLONASS, GPS, GROUND STATIONS, QZSS, IRNSS, SBAS extended standard product-3 (SP3c) https://doi.org/10.5067/GNSS/GNSS_IGSRORB_001
Ground-Based Doppler Orbitography by Radiopositioning Integrated on Satellite (DORIS) IDS Global SINEX Station Position Time Series Product from NASA CDDIS 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 IDS STCD (Station Coordinates Difference) format https://doi.org/10.5067/DORIS/DORIS_IDSSTCD_001
Ground-Based Global Navigation Satellite System (GNSS) GPS real-time POD Clock Corrections (1-second sampling, 60-second files) from NASA CDDIS GPS, GROUND STATIONS JPL TimeDependentParameter (ASCII)
Ground-Based Global Navigation Satellite System (GNSS)-based Upper Atmospheric Realtime Disaster Information and Alert Network (GUARDIAN) GPS Earth Orientation Parameters (1-day sampling, 7-day files) from NASA CDDIS GPS, GROUND STATIONS JPL GEOP (ASCII) https://doi.org/10.5067/GNSS/GDGPS_daily_eop_gps_001
Global Navigation Satellite System (GNSS) IGS Combined Final Clock Solution Comparison Summary Product from NASA CDDIS Beidou, Galileo, GLONASS, GPS, GROUND STATIONS, QZSS, IRNSS, SBAS clock RINEX format https://doi.org/10.5067/GNSS/GNSS_IGSCSUM_001
Global Navigation Satellite System (GNSS) IGS Real-Time Clock Combination of Real-Time Analysis Center (AC) Submissions Product from NASA CDDIS Beidou, Galileo, GLONASS, GPS, GROUND STATIONS, QZSS, IRNSS, SBAS RINEX https://doi.org/10.5067/GNSS/GNSS_IGSRTCLK_001
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