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 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. _______________________________________________ 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.