Hello, I am doing a research paper on the effects of relativity on the frequencies of the clocks on GPS satellites. I would like to find unmodified raw data on the shift in frequency over time of a clock in orbit. Since this would be impossible to do with modern GPS timing information, I'm interested results of the initial launch of the navstar GPS NTS-2 satellite.

According to this paper (leapsecond.com/history/Ashby-Relativity.htm - Scroll down to "Frequency Determination") over a six day span, the clock frequency changed by +442.5 pp10^12. This is also shown in figure 20. (leapsecond.com/history/nts-2-fig20.gif) The paper does not however display the data used to determine this result. According to the bibliography, this information was found in #13. "Precise Worldwide Station Synchronization via the NAVSTAR GPS, Navigation Technology Satellite (NTS-1)" by Buisson, J.A., etc. I could not find this paper anywhere on the internet and the only google result was this index: tycho.usno.navy.mil/ptti/index1.htm.

Does anyone know where I could find this paper or another source that presents unmodified data for the frequency shift of the clock of a GPS satellite over time?

Thank you very much for your help.

God knows... =)

NORAD.

I seem to remember that they have to adjust the satellite tracking data by about 20 feet per day to allow for the affect