NASA's Crustal Dynamics Data Information System (CDDIS) archives data products provided by the the Global Differential Global Positioning System (GDGPS), a real-time Global Navigation Satellite System (GNSS) monitoring and augmentation system designed to improve the positioning and timing accuracy provided by operational GPS.
Description
This product contains a time series of clock biases for healthy satellites in the GNSS constellation that are accumulated every minute throughout the day. In addition, formal 1-sigma uncertainties for the corrections are provided. The product is generated at NASA's Jet Propulsion Laboratory (JPL) Global Differential GPS Operations Centers in real-time. The data in this product can be concatenated with other daily products to provide larger coverage in time.
Data Access
JPL GDGPS daily accumulated real-time GPS precise orbit determination (POD) clock corrections products are online as GPS products, GLONASS products, and Galileo products in subdirectories by year and day.
Format
| File Naming Convention | YYYY/JJJ/SS/C_YYYY-MM-DD_JJJ_SSI_RRR.tpd.gz |
|---|
File Name Codes
| Code | Meaning | |
|---|---|---|
| YYYY | 4-digit year | |
| JJJ | 3-digit day of year | |
| SS | 2-character source identifier (e.g., "dn" or "oc") | |
| MM | 2-digit month | |
| DD | 2-digit day | |
| C | GNSS constellation | |
| G | GPS (doi:10.5067/GNSS/GDGPS_daily_acc_POD_clk_corr_gps_001) | |
| R | GLONASS (doi:10.5067/GNSS/GDGPS_daily_acc_POD_clk_corr_glo_001) | |
| E | Galileo (doi:10.5067/GNSS/GDGPS_daily_acc_POD_clk_corr_gal_001) | |
| I | 1-digit refinement of product source identifier (e.g., "1", "2") | |
| RRR | 3-digit sampling interval in seconds (e.g., "001" for 1 sec data, "030" for 30 sec data, etc.) | |
| gz | gzipped file | |
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