NASA CDDIS High-Rate GNSS Observations and Ephemeris
Updated 1mo ago
4filesBIN
Available on 2 platforms
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Description
NASA's Crustal Dynamics Data Information System archives 1-second sampled, sub-hourly files of ground-based GNSS observation and broadcast ephemeris data from a global network. The dataset includes data from multiple global navigation systems, including GPS, GLONASS, Galileo, Beidou, QZSS, IRNSS, and SBAS, with coverage expanding since 2011. Each file contains 15 minutes of data in the standard RINEX format from individual receiver sites.
Use Cases
Monitoring tectonic plate motion and crustal deformation using high-rate positional time series.
Validating and calibrating satellite broadcast ephemerides for multiple GNSS constellations.
Studying ionospheric disturbances and space weather effects on signal propagation.
Improving precise point positioning (PPP) and real-time kinematic (RTK) algorithms with 1-second data.
Analyzing Earth's rotational dynamics and polar motion from global station observations.
Strengths
Data is sourced from a global permanent network of ground-based receivers, providing worldwide spatial coverage.
Includes observations from seven distinct GNSS and augmentation systems (GPS, GLONASS, Galileo, Beidou, QZSS, IRNSS, SBAS), offering multi-constellation data.
Provides high-temporal-resolution data with a 1-second sampling rate in standardized RINEX format.
Limitations
Key metadata such as row counts, file sizes, and specific column names are not provided on the listed platforms.
The dataset's license is listed only as 'other-license-specified', requiring users to consult external sources for precise terms.
Descriptions are highly similar across entries, making it difficult to distinguish the specific contents and structure of individual data products (e.g., observation vs. ephemeris files).
Provenance
Source
NASA Crustal Dynamics Data Information System (CDDIS)
Collection Method
Collected from a global permanent network of ground-based GNSS receivers.
Time Range
Data collection includes archives since at least 2011, when multi-GNSS data ingestion began.
Freshness
2026-04-10 (as indicated by the most recent 'last updated' date on Data.gov)
Geography
Global coverage from a network of permanent ground stations.
Data is provided in specialized RINEX formats (BIN, ISO) which require specific geodetic software to process. Users must refer to the CDDIS website for detailed documentation and the specific 'other-license-specified' terms.