Hi Brooke: In the original post that I was replying to, the concept was advocated as a “it goes into every iPhone on the planet”. That’s what I was commenting on.
Bob > On May 18, 2015, at 2:06 PM, Brooke Clarke <[email protected]> wrote: > > Hi Bob: > > In the link in the message from Brian it explains that iGPS is for military > users of the Iridium system. > The key feature is to allow a moving vehicle to lock on the GPS signal while > being jammed. They do that and also get a more accurate fix by using signals > from the Iridium satellites. > > I see a potential problem in that the Iridium signals are close in frequency > to GPS and a broad band jammer might cause a problem for both of them. > Mail_Attachment -- > Have Fun, > > Brooke Clarke > http://www.PRC68.com > http://www.end2partygovernment.com/2012Issues.html > http://www.prc68.com/I/DietNutrition.html > Bob Camp wrote: >> Hi >> >> “Orders of magnitude” more accurate … >> >> Right now, you can get around ~1 M in most areas. One order of magnitude >> would be <10 cm. >> More than one order of magnitude would be <10 mm. To me “orders” implies >> more than two, so that >> would be <1 mm. >> >> I guess everybody can toss out all their multi band GPS gear, there’s no >> need for it anymore. No need >> to put up all those expensive block III GPS sat’s either :) >> >> hmmmmm……I do believe the marketing boys have been playing with the numbers. >> You would have to start >> from a >50 M error to get them to make much sense based on what they are >> doing. >> >> =========== >> >> If you dig a bit more, Apple bought Coherent Navigation almost a half year >> ago. The main purpose appears >> to be merging their mapping software into Apple’s ill-fated maps program. >> Given that Iridium is a “pay’ >> service (as in $$$$$) you probably will not see it in run of the mill cell >> phones very soon …. >> >> Bob >> >>> On May 17, 2015, at 7:07 PM, Chris Albertson <[email protected]> >>> wrote: >>> >>> Anyone know anything about "iGPS"? Apparently the Iridium low orbit >>> communications sats are now modified via software update to send >>> signals that when combined with GPS allow for a receiver that is MUCH >>> more precise and harder to jam and can work in urban areas better. >>> Apple just bought a company that is building iGPS receivers. Looks >>> like something that they might want to put inside a cell phone but >>> when you have an orders of magnitude important in position you'd >>> expect better timing too, or so I would think. >>> >>> Seems like a very smart idea if all that was required was a software >>> upload to existing spacecraft. From what I read this is real, not a >>> proposal another are real receivers being tested. >>> >>> >>> -- >>> >>> Chris Albertson >>> Redondo Beach, California >>> _______________________________________________ >>> 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. >> > > _______________________________________________ > 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.
