Hi If you go back into the papers from the early 1980's there is one where they used a high gain antenna and no knowledge of the coding scheme to pull timing off of GPS. I believe it was at White Sands, but that could be wrong.
Bob On Mar 29, 2013, at 11:42 PM, Stewart Cobb <[email protected]> wrote: >> I wonder if you cannot do this same work from the ground. Has anyone > tried >> tracking single GPS satellites from the ground using very high gain >> tracking antenna. > > Many times. USAF does this each time they launch a new GPS satellite, to > check out all the kit in a "high-res" view before they switch it on for > general use. They used to use an antenna at Camp Parks in the California > central valley. When that one was being overhauled a few years ago, they > used Stanford's "big dish" for a while. It gives about 60 dB gain at L1, > IIRC. > > Hardcore GPS researchers have used that dish and a bunch of others over the > years. If you're interested, contact SRI. They used to charge a couple of > hundred bucks an hour for the Stanford dish. > > Hard to use for weather forecasting, though, because you can only see one > tiny chunk of atmosphere at a time. > > Cheers! > --Stu > _______________________________________________ > 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.
