Of the 2 lc orgs I administer or am a member of, and the roughly 8 other lc orgs I interact with on a regular basis, only one uses lc certified gps equip. The others are all consumer grade or don't use gps.
However, a slew of filings and letters from the lc community might not be a bad idea, if only to lay the groundwork for the inevitable lawsuits. On Feb 2, 2011, at 3:06 PM, Rex <r...@sonic.net> wrote: > On 2/2/2011 7:25 AM, jimlux wrote: >> >> >> I got the impression that it wasn't modeled, but was an actual field test of >> some sort. I'll have to go back and reread. >> >> But, it's possible that the consumer receiver has better multipath and >> interference rejection, if only because it's newer. Aviation stuff takes >> longer to go through the approval cycle, so it tends to lag consumer >> electronics in terms of technology adoption. >> >> > > From the paper submitted by the GPS manufactureres to the FCC > http://www.gpsworld.com/gnss-system/signal-processing/lightsquared-jamming-report-11030 > > it seems they simulated the Lightsquared signal with test equipment and made > measurements in an anechoic chamber of effects on GPS signal reception to a > couple of popular GPS receivers. Using this data they extrapolated real-world > effects with path loss calculations. Ironically, it probably wouldn't be > legal or safe to make the jamming measurements in a real, open space, > environment. > > The paper says the Lightspeed transmitters can be up to around 15 kW EIRP in > a band right adjacent to GPS. I would think filtering out that signal to > avoid overload would be a daunting task. > > > > _______________________________________________ > 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.
