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Description

This dataset consists of ground-based Global Navigation Satellite System (GNSS) GPS Combined Broadcast Ephemeris Data (daily files of all distinct navigation messages received in one day) from the NASA Crustal Dynamics Data Information System (CDDIS). GNSS satellites provide autonomous geo-spatial positioning with global coverage. GNSS data sets from ground receivers at the CDDIS consist primarily of the data from the U.S. Global Positioning System (GPS) and the Russian GLObal NAvigation Satellite System (GLONASS). Since 2011, the CDDIS GNSS archive includes data from other GNSS (Europe's Galileo, China's Beidou, Japan's Quasi-Zenith Satellite System/QZSS, the Indian Regional Navigation Satellite System/IRNSS, and worldwide Satellite Based Augmentation Systems/SBASs), which are similar to the U.S. GPS in terms of the satellite constellation, orbits, and signal structure. The daily GNSS combined GPS broadcast ephemeris files contain one day of combined GPS navigation (30-second sampling) data in RINEX format from a global permanent network of ground-based receivers, one file per day.

Product Summary

Platforms
NOT APPLICABLE
Spatial Extent
N: 90 S: -90 E: 180 W: -180
Coordinate System
CARTESIAN
Granule Spatial Representation
CARTESIAN
Temporal Extent
1992-01-01 to Present
Data Partner
Crustal Dynamics Data Information System, Geodesy and Geophysics Laboratory, Earth Sciences Division, Sciences and Exploration Directorate, Goddard Space Flight Center, NASA (CDDIS)
Concept ID
c3444538992-cddis
Data State
ACTIVE
Processing Level
1
Published

Citation

Citation is critically important for dataset documentation and discovery. This dataset is openly shared, without restriction, in accordance with the EOSDIS Data Use and Citation Guidance.

Copy Citation

International GNSS Service (IGS). (2025). Daily 30-second combined GPS broadcast ephemeris data [Data set]. NASA Crustal Dynamics Data Information System. https://doi.org/10.5067/GNSS/GPS_DAILY_B_001 Date Accessed: 2025-07-19

File Naming Convention

YYYY/DDD/YYb/XXXXMRCCC_K_YYYYDDDHHMM_01D_30S_MN.rnx.gz

Documents

GENERAL DOCUMENTATION URL for more information about GNSS observation data

Learning Resources

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