In my view a backup solution that allows the existing gps based timing receivers to be used makes a reasonable ammount of sense. Another approach could involve ground based transmitters on high buildings or mountain tops.
------------------------------ On Sun, 15 Jul, 2012 4:23 PM EDT J. Forster wrote: >This makes no sense. > >The major expense of any radio system is not the transmitters, but the >infrastrcture to support those transmitters. > >Things like land, towers, buildings, maintenance people, and legal costs >all are far more than a transmitter. And, have you looked at the cost of a >single satellite? LORAN-C could have been run for a decade or three for >the cost of a single bird. > >Many of those are probably available for a resurected LORAN-C, except for >what has been sold off. > >-John > >=========== > > > >> >> GWEN was a late cold war era LF "cellular style" communications system >> for use within parts of the USA. Over the years I've seen a number of >> cesium standards on Ebay being sold as "ex GWEN" equipment. As far as I >> know GWEN is long gone. >> >> Supposedly some AM broadcast stations also transmitted fsk data for >> defence purposes as well. Perhaps some AM broadcast stations could be >> used to transmit timing information. >> >> There were also cold war era proposals for a nation wide LF broadcast >> system for civil defence use and iirc at least one transmitter was >> actually on the air in the 70's or early 80's. >> >> As much as I'd like to see a nation wide LF broadcast system as a means of >> distributing standard time, frequency, and other related information, I >> just don't see it happening in this day and age. >> >> Some form of backup to gps would be nice for timing purposes. I wonder if >> a secondary sattelite based system for timing use only over the >> continental US might be the way to go. (Ie. a transmitter on a geo >> stationary sattelite that could emulate enough of the gps signals to allow >> statioanry timing receivers to function.) >> >> ------------------------------ >> On Sun, 15 Jul, 2012 2:09 PM EDT Tom Miller wrote: >> >>I believe many of the GWEN sites were converted to VLF beacons >> transmitting >>differential GPS reference data. >> >>I know of one site in Crownsville, Maryland that does just that. >> >>I don't know the up to data status of these sites now. >> >> >>Regards, >>Tom >> >> >> >>----- Original Message ----- >>From: "jmfranke" <jmfra...@cox.net> >>To: "Discussion of precise time and frequency measurement" >><time-nuts@febo.com> >>Sent: Sunday, July 15, 2012 1:29 PM >>Subject: Re: [time-nuts] WWVB and Free Democracies Survival >> >> >>Was it GWEN (Ground Wave Emergency Network)? When it was shut down, many >> of >>the transmitter sites were scheduled to be used as part of an inland >> LORAN >>system run primarily for the railroads. >> >>John WA4WDL >> >>-------------------------------------------------- >>From: "Don Latham" <d...@montana.com> >>Sent: Sunday, July 15, 2012 12:53 PM >>To: "Discussion of precise time and frequency measurement" >><time-nuts@febo.com> >>Subject: Re: [time-nuts] WWVB and Free Democracies Survival >> >>> >>> >>> No you use a great number of tiny >>> overlapping cells combined with spread spectrum and strong encryption >>> and you control it with a some kind of self organizing mesh network, >>> not a top-down control system. What this does is mimic nature. >>> Think about rats and cockroaches >>> Chris Albertson >>> Redondo Beach, California >>> There was (is?) a vlf system like this at one time, along with a buried >>> cable system, cold-war projects. Can't remember what they were called, >>> or present status. These things are kinda lost these days, like the >>> original reason for the national interstate freeway system-transport of >>> truck-mounted ICBMs'--taken over by the ICBM subs... >>> Don >>> >>> >>> -- >>> "Neither the voice of authority nor the weight of reason and argument >>> are as significant as experiment, for thence comes quiet to the mind." >>> R. Bacon >>> "If you don't know what it is, don't poke it." >>> Ghost in the Shell >>> >>> >>> Dr. Don Latham AJ7LL >>> Six Mile Systems LLP >>> 17850 Six Mile Road >>> POB 134 >>> Huson, MT, 59846 >>> VOX 406-626-4304 >>> www.lightningforensics.com >>> www.sixmilesystems.com >>> >>> >>> >>> _______________________________________________ >>> 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. >> >> >>_______________________________________________ >>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. >> >> > > > >_______________________________________________ >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.