I seem to recall that some of the high precision users also need to receive a satellite delivered differential GPS signal outside of the GPS band.
----- Original Message ---- From: Jim Lux <[email protected]> To: [email protected] Sent: Thu, June 9, 2011 12:32:42 PM Subject: Re: [time-nuts] GPS interference and history... On 6/9/11 12:22 PM, Chuck Forsberg WA7KGX N2469R wrote: > According to the John Deere article, the higher performance GPS > receivers, such as those used > for agricultural application and IFR navigation have wider front ends to > obtain more precise information > from GPS signals. The LightSquared transmitters wouldn't pose such a > problem if they were in orbit. >> Exactly.. Deere (and others) designed based on the general understanding of what the spectrum would look like. Mostly satellite radiated (where, as others have noted, you're limited to a few kW) and a few "fill-in" transmitters to handle "urban canyons" and the like.. low power in general, and not in the middle of a farm field in any case. The L^2 scheme turned that on its head.. lots of high powered terrestrial transmitters, etc. _______________________________________________ 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.
