A 'bent pipe' or retroreflector doubles any Dopplar from range rate. -John
================ > On Wed, 3 Jul 2013 08:29:02 -0400 > Bob Camp <[email protected]> wrote: > >> There are two batches of GPS / WAAS sats up there: >> >> 1) The ones with numbers above 100 that are geosync and that only do >> WAAS >> >> 2) The ones with numbers <= 32 that do nav. These are not geosync. >> >> I believe the only ones with corrected / high stab clocks on board are >> those in the second group. The stuff in the first group aren't dedicated >> sats, just leased transponders on conventional multipurpose geosync >> birds. > > I don't know about WAAS, but AFAIK the EGNOS signals are generated on > ground using Cs references and retransmitted by the satelites using > a "bend pipe". Ie. the signals should be of time-nut quality even without > high accuracy frequency standards in the birds themselves. > > (Sorry, i'm not able to find where i read about that, so no references > today) > > Attila Kinali > > -- > The people on 4chan are like brilliant psychologists > who also happen to be insane and gross. > -- unknown > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
