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ORBIT AND CLOCK DATA PRODUCTS

GIPSY-OASIS Products:

GIPSY-OASIS is used to routinely generate precise estimates of the GPS satellite orbit positions and clock offsets. The latencies of these products vary from < 2 hours (near real time) to 14-days. The accuracy of the products improves with longer latencies.

JPL's Precise Orbit and Clock Estimates for GPS Constellation in GIPSY Format:
Product Latency 3-D RMS Accuracy (cm) Product Location (anonymous FTP)
Ultra-Rapid < 2 hours 5 ftp://sideshow.jpl.nasa.gov/pub/JPL_GPS_Products/Ultra
Rapid Next-Day (16:00 UTC) 3.5 ftp://sideshow.jpl.nasa.gov/pub/JPL_GPS_Products/Rapid
Final < 14 days 2.5 ftp://sideshow.jpl.nasa.gov/pub/JPL_GPS_Products/Final
Note: Mozilla Firefox is recommended for viewing the above Product Locations.
  • All products provided in formats native to GIPSY.
  • Products include information to enable single receiver ambiguity resolution with the GIPSY-OASIS software.
  • Daily Rapid and Final products span a 30-hour window centered at noon of each day.
  • Ultra-Rapid products span a 30-hour moving window, and are updated (over-written) every hour. The file name prefix of the products (YYYY-MM-DD) is consistent with the last epoch of the 30-hour moving window. The exception is from 00:00 to 03:00 UTC of each day, when products from the current and previous day are both updated. As such, the last update for a particular day's Ultra-Rapid product covers a 30-hour period centered at noon of that day, consistent with the Rapid and Final products.
  • Rapid and Ultra-Rapid products are provided in fiducial frame only.
  • Final products are provided in a fiducial-free(nf) frame, no-net-rotation(nnr) frame, and fiducial frame. The NNR products are similar to NF products except that they have no net rotation with respect to the fiducial frame.


IGS Products:

The Jet Propulsion Laboratory is a contributing Analysis Center for the International GNSS Service (IGS). JPL contributes our Rapid and Final orbit and clock estimates to the IGS. The contributions to the IGS contain the Rapid and Final orbit and clock estimates in IGS formatted products.
JPL's Precise Orbit and Clock Estimates for GPS Constellation in IGS Format:
Product Latency 3-D RMS Accuracy (cm) Product Location (anonymous FTP)
Rapid Next-Day (16:00 UTC) 3.5 ftp://sideshow.jpl.nasa.gov/pub/JPL_GPS_Products/Rapid
Final < 14 days 2.5 ftp://sideshow.jpl.nasa.gov/pub/jpligsac
Note: Mozilla Firefox is recommended for viewing the above Product Locations.


Disclaimer:
JPL's orbit and clock products are intended for research and educational purposes only. Commercial use requires prior approval from the Jet Propulsion Laboratory, California Institute of Technology.