What does that have to do with "... based in LEO has a relatively high > risk profile from the Universe/hostile activity/spoofing and jamming..."?
I note the previous correction to your statement, that it is MEO not LEO. Lester B Veenstra MØYCM K1YCM W8YCM les...@veenstras.com US Postal Address: 5 Shrine Club Drive HC84 Box 89C Keyser WV 26726 GPS: 39.33675 N 78.9823527 W (Google) GPS: 39.33682 N 78.9023741 W (GPSDO) Telephones: Home: +1-304-289-6057 US cell +1-304-790-9192 UK cell +44-(0)7849-248-749 Guam Cell: +1-671-929-8141 Jamaica: +1-876-456-8898 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: Scott McGrath [mailto:scmcgr...@gmail.com] Sent: Tuesday, July 30, 2013 12:11 PM To: les...@veenstras.com; Discussion of precise time and frequency measurement Cc: <j...@quikus.com>; Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Story in the Economist about GPS jamming The atmosphere protects the earth from a lot of stuff the universe throws at us Solar flares , space junk , micrometeors just the usual hazards the space at large has. Inability to service satellites when transmitters or RCS fuel exhausted Sent from my iPhone On Jul 30, 2013, at 9:31 AM, "Lester Veenstra" <les...@veenstras.com> wrote: > Exactly what do you mean by "... based in LEO has a relatively high > risk profile from the Universe/hostile activity/spoofing and jamming..."? > > Other than a LOS, in a jammers immediate area, GPS is not subject to > jamming, and for the critical users, ie, the DOD, very difficult to > jam, even in a LOS. > > The LEO makes it harder to jam since the received signal strength is > higher than would be practical from GeoSync orbit, not easier, as is > implied my Mr. McGraths comment. > > Lester B Veenstra M YCM K1YCM W8YCM > les...@veenstras.com > > US Postal Address: > 5 Shrine Club Drive > HC84 Box 89C > Keyser WV 26726 > GPS: 39.33675 N 78.9823527 W (Google) > GPS: 39.33682 N 78.9023741 W (GPSDO) > > > Telephones: > Home: +1-304-289-6057 > US cell +1-304-790-9192 > UK cell +44-(0)7849-248-749 > Guam Cell: +1-671-929-8141 > Jamaica: +1-876-456-8898 > > 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. > > > > _______________________________________________ > 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.