Hi John, You may have found other solutions in the last ten days, but... I've set up some tools for the asteroid surveying community that may be of use to your friend. It provides a full-system calibration method: find out which navigation satellites are visible to you, compute an ephemeris for a desired satellite, then check your measurements against the expected location for that satellite. https://www.projectpluto.com/gps_expl.htm This is really aimed more at the astronomical (asteroid observing) community than it is at satellite observers. But it may have some use outside of where I was thinking. The benefit here is that navigation satellites usually have positions good to within a few centimeters. There are a few in geosynch orbits, but they're Chinese or Japanese and probably not well positioned if you aren't at those longitudes. Your friend may be chasing GPS or GLONASS or Galileo satellites, which will move a bit faster. Still ought to serve as a suitable reference, though. One small sticking point : the tools assume you have an MPC (Minor Planet Center) observatory code. Send me a lat/lon/alt privately (e-mail is at end of the above link) and I'll add an "unofficial" MPC code. -- Bill _______________________________________________ Seesat-l mailing list http://mailman.satobs.org/mailman/listinfo/seesat-lReceived on Wed Jun 27 2018 - 21:27:22 UTC
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