Hi Simple example:
Single sat straight overhead, well compensated by broadcast ionosphere. All survey error in the X direction. Multiple sats all clustered at the horizon. Cluster located on the +X axis. Ionosphere not well modeled over the much longer path. Yes this *is* a bit contrived. It’s also what can happen in an “overhanging balcony” sort of antenna location. I can also make it happen pretty easily from a USB stick indoors and locating “just right” relative to the windows. Bob > On Dec 4, 2016, at 10:45 AM, Attila Kinali <att...@kinali.ch> wrote: > > On Sun, 4 Dec 2016 09:46:45 -0500 > Bob Camp <kb...@n1k.org> wrote: > >> It’s possible (but unlikely) to have a single sat in a “perfect” location >> give >> you a better solution than a group of sats in a really crummy location ….. >> This is yet another reason for wanting a full sky view. Seeing several >> sats at a crummy angle may still be a less than ideal thing. > > Frühauf proposed using satellite dishes on WAAS satellites for > improved timing accuracy/stability[1]. Unfortunately, I have not > seen any good analysis of the achieved performance. > > Attila Kinali > > > [1] "WAAS for Telecom applications", Hugo Frühauf, 2003, updated 2011 > http://hugofruehauf.com/pdf/24-WAAS_for_Telecom_2003-upd_2011.pdf > > -- > It is upon moral qualities that a society is ultimately founded. All > the prosperity and technological sophistication in the world is of no > use without that foundation. > -- Miss Matheson, The Diamond Age, Neil Stephenson > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
