Yes, for instance the aviation industry, WAAS, which is in the L-Bans mobile satellite assignment, (INMARSAT etc), that L^2 reuses and thus kills.
Lester B Veenstra MØYCM K1YCM les...@veenstras.com m0...@veenstras.com k1...@veenstras.com US Postal Address: PSC 45 Box 781 APO AE 09468 USA UK Postal Address: Dawn Cottage Norwood, Harrogate HG3 1SD, UK Telephones: Office: +44-(0)1423-846-385 Home: +44-(0)1943-880-963 Guam Cell: +1-671-788-5654 UK Cell: +44-(0)7716-298-224 Jamaica: +1-876-352-7504 This e-mail and any documents attached hereto contain confidential or privileged information. The information is intended to be for use only by the individual or entity to whom they are addressed. If you are not the intended recipient or the person responsible for delivering the e-mail to the intended recipient, be aware that any disclosure, copying, distribution or use of the contents of this e-mail or any documents attached hereto is prohibited. -----Original Message----- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Mark Spencer Sent: Thursday, June 09, 2011 8:42 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] GPS interference and history... 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 <jim...@earthlink.net> To: time-nuts@febo.com 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 -- 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. _______________________________________________ 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.