Well, OK, but I never saw a small, <$500 box that could be put on pleasure boats, etc. and directly read out Lat/Long. Such things were available at the local boating store for LORAN.
-John ==============. > John, Omega did make it into the 'uP age' I briefly got involved in the > 80's and my first patent was for using DSPs and software radio for an > Omega development . The key thing was Omega was genuinely world wide > from a small chain of transmitters and one of the important users had to > do their navigation while staying underwater for weeks on end, even > Loran had limitations never mind satellite. > > It might be the answer "the mystery Collins Ru" posting here, I remember > similar items in airborne Omega receivers, the omega carrier frequencies > were low but the receiver bandwidths were measured in mHz and phase > error was critical hence the boxes I saw included similar references. > > Its rather painful to see all the warnings about GPS made 30 years ago > having to be re addressed. I suspect Loran will not get a big revival, > the important development since the '80s is probably cheap MEMS inertial > measurement sensors that give a user a secure cheap independent > accessory to integrate with GPS etc. Its not an alternative but a rather > useful thing to merge into a system to help deal with spoofing or other > signal loss, this page from Analog Devices shows prices and performance: > > http://www.analog.com/en/mems-sensors/mems-inertial-measurement-units/products/index.html#iSensor_MEMS_Inertial_Measurement_Units > > There are other opportunistic navigation systems that try (tried?) other > approaches such as Peter Duffett-Smith's Cursor system which I think is > now in the hands of CSR. > > Regards > David > > >> ---------------------------------------------------------------------- >> >> Message: 1 >> Date: Sun, 28 Jul 2013 15:24:30 -0700 (PDT) >> From: "J. Forster" <j...@quikus.com> >> >> Subject: Re: [time-nuts] GPS Spoofing >> >> I'm not so convinced about this: >> >> "OMEGA was the primary means of radio navigation, world wide, from 1976 >> to >> 1997. ." >> >> There was LORAN-C, after all. >> >> And Omega was a CW, phase difference system, LORAN a pulse system. >> >> AFAIK, Omega never really made it into the uP age; LORAN certainly did. >> >> -John >> >> =========== >> > > > _______________________________________________ > 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.