My first contact with LORAN was at the bankrupcy of a local company that supplied tracking and location services for trucking companies. The trucks had a receiver that sent data back to home base via two-way radio and home pbase computed positions. I was only nteresteed in buying their mimis.
In the early 80s I was playing around with uP (8085) based LORAN receivers (Made by Appelco/Raytheon). One version read out time differences and a more advanced (w/ 2x 8085s) version read out Lat & Long directly. Either would pinpoint my location to 100' class. It was accurate navigation in a two-way radio sized box. There were, of course, no map or chart displays. Imagine what 20+ years of development would have brought. -John ============= > Bruce, > > I agree with your calculation and conclusion, as far as commercial > consumer > GPS receivers are concerned. > > A data sheet that was linked in a previous post for an aviation-grade > commercial GPS receiver indicated resistance to signals -30dBm at the > receiver input. That is quite considerable, and much better than the > hand-held consumer units (by 30dB?) > > I would expect planes and other potential "high value targets" to have > receivers of similar performance. > > I don't disagree that it would be fairly easy to disrupt the consumer > devices, but other than a few missed appointments and frustrated gadget > freaks, and the occasional emergency vehicle not finding its way to the > scene of an accident, that would be more of a problem) I am not too > worried > about the consequences of that. > > The thread started with the loss of the LORAN system, and nobody (maybe I > am > going out on a limb here) ever used a LORAN receiver in his car to find > the > nearest restaurant :) > > I think the people who should complain the most about the loss of LORAN > are > the boaters, but they are the one who embrassed GPS the first and are it's > biggest advocates!!! I know, I live on the coast of Florida. > > Didier _______________________________________________ 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.
