Real Time Pilot Project

Analysis Products

A number of contributing Real Time Analysis Centres provide daily clock RINEX and SP3 product files to ESOC, which performs the AC coordination activities. The products are derived from the Real Time infrastructure of the individual Analysis Centres. ESOC then computes a combination clock product which is disseminated daily, along with a comparison summary report. The algorithms used for the combination are the same as will be used in the near future for providing a Real Time combination product stream. This will comprise the clock corrections for the GPS satellites and the IGU-predicted orbits.

The daily combination clock RINEX files and comparison reports are now uploaded to the CDDIS data server and can be found under ftp://cddis.nasa.gov/gps/products/rtpp/.

Target combination product performances are:
Satellite Clock Accuracy: 0.3 ns
Station Clock Accuracy: 0.3 ns
Orbit Accuracy: At the level of the IGS Ultra predictions Latency (when available in RT): 10 s

The clock accuracy is measured as the RMS difference between the IGS rapid or final clock solution and the combination solution, after removing a common offset per epoch.

Analysis Results

combined results
Number of Measurements Satellite Clock RMS Satellite Clock Sigma Orbit RMS

dlr results
Number of Measurements Satellite Clock RMS Satellite Clock Sigma Orbit RMS

nrcan results
Number of Measurements Satellite Clock RMS Satellite Clock Sigma Orbit RMS

esoc results
Number of Measurements Satellite Clock RMS Satellite Clock Sigma Orbit RMS

esoc2 results
Number of Measurements Satellite Clock RMS Satellite Clock Sigma Orbit RMS

gmv results
Number of Measurements Satellite Clock RMS Satellite Clock Sigma Orbit RMS

bkg results
Number of Measurements Satellite Clock RMS Satellite Clock Sigma Orbit RMS

bkg2 results
Number of Measurements Satellite Clock RMS Satellite Clock Sigma Orbit RMS