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Description

This dataset consists of ground-based multi-GNSS (Global Navigation Satellite System) Broadcast Ephemeris Data. 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. Colleagues at the Technical University in Munich (TUM) and Deutsches Zentrum für Luft- und Raumfahrt (DLR) provide to the CDDIS a merged, multi-GNSS broadcast ephemeris file containing GPS, GLONASS, Galileo, BeiDou, QZSS, and SBAS ephemerides. The file is generated from real-time streams and contains all unique broadcast navigation messages for the day.

Product Summary

Platforms
Beidou,
GLONASS,
GPS,
GROUND STATIONS,
Galileo,
IRNSS,
QZSS,
SBAS
Instruments
Beidou P,
GLONASS P,
GNSS RECEIVER,
GPSP,
Galileo P,
IRNSS P,
QZSS P,
SBAS P
Spatial Extent
N: 90 S: -90 E: 180 W: -180
Geographic Region
GLOBAL
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
c3574940873-cddis
Data State
ACTIVE
Processing Level
1A
Published

Additional Citation

International GNSS Service (IGS). 1992. Daily multi-GNSS broadcast ephemeris data [online]. Available from the NASA Crustal Dynamics Data Information System DAAC, Greenbelt, MD, USA at: http://doi.org/10.5067/GNSS/gnss_daily_multi_b_001, Accessed [[enter user data access date]].

File Naming Convention

YYYY/brdc/BRDM00DLR_S_YYYYDDD0000_01D_MN.rnx.gz OR YYYY/DDD/YYp/BRDM00DLR_S_YYYYDDD0000_01D_MN.rnx.gz

The daily multi-GNSS broadcast ephemeris files were previously also archived in short filename format through the summer of 2020. These files were stored in the MGEX campaign subdirectories at this starting directory: https://cddis.nasa.gov/archive/gnss/data/campaign/mgex/daily/rinex3/ in subdirectories by year and day of year as follows: Append the following directory and file names to the starting directory using the format below: YYYY/brdm/brdmDDD0.YYp.Z

Documents

GENERAL DOCUMENTATION URL for more information about GNSS daily mixed broadcast navigation data

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