IGS Real Time Analysis Center 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:
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.