Hi Bringing this back to GPS…
The TV stuff is at about 8X the frequency of GPS. That makes a difference in terms of things like rain. That said, yes, there probably is some giant rainstorm that would impact GPS accuracy. Much more likely in a “I can only see a small patch of sky” situation. Bob On Oct 10, 2014, at 1:16 AM, Andy <ai.egrps...@gmail.com> wrote: > Bob Stewart <b...@evoria.net> wrote: > > ... Also, the cartoons I was recording for my granddaughter were >> unaffected, but the station I was watching had the outage. That doesn't >> all fit together unless it was the uplink that had the problem. > > > I don't think the uplink itself can have this problem. > > But DirecTV uses multiple transponders per satellite, and in some cases > more than one satellite, so all the channels are not affected equally. > > When I had DirecTV, we had two dishes. The installer boggled up the first > install so they came back and put up another one several feet away, mounted > on a more stable surface (not roof shingles). The first dish was one that > could be used for multiple satellites. It had three 'focal' points with > three little radomes that either had, or could have, LNAs in them. Each > points to a different spot in the sky. The second dish had only one. > Regardless, we received only one satellite. > > I don't recall ever being affected by a solar outage, but rain and ice were > real killers! Yeah they say rain shouldn't cause an outage, but it does > when the rain density is high enough. I could use that to predict when we > were about to be hit by a downpour. There was about a 3 minute lag between > losing all the channels, and the downpour starting. > > It occurred to me that one could use satellite signals as a meteorological > instrument to measure the water density in the atmosphere above you. I > wonder if the NWS does that. > > Andy > _______________________________________________ > 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.