Ground-Based Global Navigation Satellite System Differential Code Bias Product from NASA CDDIS
This dataset consists of differential code biases (DCBs) from a network of ground-based Global Navigation Satellite System (GNSS) station and available from the NASA Crustal Dynamics Data Information System (CDDIS). GNSS 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. DCBs are the systematic errors, or biases, between two GNSS code observations at the same or different frequencies. DCBs are required for code-based positioning of GNSS receivers, extracting ionosphere total electron content (TEC), and other applications. Proper knowledge of DCBs is crucial to many navigation applications but also non-navigation applications such as ionospheric analysis and time transfer. With all of the new signals offered by modernized and new GNSS constellations, analysts now require a comprehensive multi-GNSS DCB product. More information about these data is available on the CDDIS website at https://cddis.nasa.gov/Data_and_Derived_Products/GNSS/gnss_differential_code_bias_product.html.
| Science Keywords: |
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| Spatial Extent: | n/a |
Data Format(s): | n/a |
| Temporal Extent: | Platform(s): | Beidou, Galileo, GLONASS, GPS, GROUND STATIONS, QZSS, IRNSS, SBAS | |
| Data Center(s): | NASA/GSFC/SED/ESD/GGL/CDDIS | Instrument(s): | Beidou P, Galileo P, GLONASS P, GPSP, GNSS RECEIVER, QZSS P, IRNSS P, SBAS P |
| Version: | 1 | ||
- GENERAL DOCUMENTATION: https://cddis.nasa.gov/Data_and_Derived_Products/GNSS/gnss_differential_code_bias_product.html, URL for more information about GNSS DCB products
Collection Information
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Purpose
The GNSS receivers collect the signals from orbiting satellites to determine their location in three dimensions and calculate precise time. GNSS receivers detect, decode, and process both pseudorange (code) and phase transmitted by the GNSS satellites. The satellites transmit the ranging codes on two or more radio-frequency carriers, allowing the locations of GNSS receivers to be determined with varying degrees of accuracy, depending on the receiver and post-processing of the data. The receivers also calculate current local time to high precision facilitating time synchronization applications. -
DOI
10.5067/GNSS/GNSS_IGSDCB_001
http://dx.doi.org/
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Data Identification
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Processing Level
2
Differential Code Bias product
- Quality
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Collection Progress
Active
Data Dates
| Creation |
Related URLs
Acquisition Information
Projects
| Project Short Name | Campaigns | Project Dates |
|---|---|---|
| IGS | No campaigns listed. | Start: 1992-01-01 |
| SGP | No campaigns listed. | Start: 2011-01-01 |
Temporal Information
Temporal Keywords
- 1 second - < 1 minute
Spatial Information
| Coverage Type | Zone Identifier | Geometry | Granule Representation |
|---|---|---|---|
| HORIZONTAL | CARTESIAN |
Resolution and Coordinate System
Location Keywords
- GEOGRAPHIC REGION
- GLOBAL
Data Centers
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NASA/GSFC/SED/ESD/GGL/CDDIS
ARCHIVER, DISTRIBUTORCrustal Dynamics Data Information System, Geodesy and Geophysics Laboratory, Earth Sciences Division, Sciences and Exploration Directorate, Goddard Space Flight Center, NASA
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NASA GSFC
Code 61A
Greenbelt, Maryland 20771
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Data Contacts
There are no listed data contacts for this collection.
Archive And Distribution Information
There is no archive and distribution information for this collection.