Jan Hoevers wrote: [] > Seen from the earth' surface that leaves a large circular area of the > sky - centered over the pole - where no sats fly. In tropical and > temperate zones part of that circle is below the horizon, at latitudes > of more than 55 deg the entire circle is above the horizon, and a > (small) part of the "opposite side of the donut" becomes visible at > the northern horizon (southern horizon if you're down under). [] > hope this helps a bit, > Jan Hoevers
Interesting you should mention that, Jan. I've recently written a program to try and plot one's radio horizon by recording the strengths of GPS satellite signals, and it can be downloaded here: http://www.david-taylor.myby.co.uk/software/GPShorizon.zip The file polar-plot.jpg I included in the Zip archive shows the sky coverage gap you described rather well. Cheers, David -- SatSignal software - quality software written to your requirements Web: http://www.satsignal.eu Email: [EMAIL PROTECTED] _______________________________________________ timekeepers mailing list [email protected] https://fortytwo.ch/mailman/cgi-bin/listinfo/timekeepers
