Transit has been off the air some 20+ years. It really was one of the beginnings of satellite navigation. Regards Paul
On Thu, Aug 6, 2020 at 5:40 PM Bill Notfaded <[email protected]> wrote: > Isn't there also CDMA? We used a EndRun Technologies system not long ago > that used a small short antenna that could be located inside and didn't > need a cable to the roof for a GPS antenna. This was handy for rooms that > couldn't have anything penetrate the walls at all. It was a good reference > and ntp server we used for years that only used time reference from CDMA > satellites. > > Bill > > On Thu, Aug 6, 2020, 1:43 PM jimlux <[email protected]> wrote: > > > On 8/6/20 9:17 AM, Taka Kamiya via time-nuts wrote: > > > Someone in this thread mentioned "at least 2 satellite time and > > frequency solutions" exists already. I only know of GPS (GNSS) > > constellations. What's the other? > > > > Transit? > > > > I don't believe they are still operational, though. > > > > > > I wonder if one might be able to pick up time/frequency from a > > commercial TV broadcast transponder. The transponders on the satellite > > are typically bent pipes (for C-band anyway), I would assume that the > > uplinks may or may not have stability comparable to terrestrial > broadcast. > > > > One problem is, of course, that the satellites aren't in a stable > > location (at least on a "meters" scale) - but one could certainly do > > "common view" kinds of time transfer. > > > > > > > > > > > > > > --------------------------------------- > > > (Mr.) Taka Kamiya > > > KB4EMF / ex JF2DKG > > > > > > > > > On Thursday, August 6, 2020, 12:01:27 PM EDT, paul swed < > > [email protected]> wrote: > > > > > > Magnus > > > Its honestly by luck that I know anything. From the bits I have read > > Europe > > > seems far closer to eLORAN then we are. Perhaps 6 months ago the US > > > performed a series of tests 2 eLoran solutions and something like 6 or > > more > > > satellite solutions. I know the old Iridium satellites were in the > tests > > > and some other LEO satellites. > > > But thats about it. > > > What we need is a cheap SDR LORAN C sniffer. Low power runs 24 X 7 and > > > turns a LED on if the stations active. > > > Oh well another project in the someday pile. > > > Regards > > > Paul > > > WB8TSL > > > > > > On Thu, Aug 6, 2020 at 2:42 AM Magnus Danielson <[email protected]> > > wrote: > > > > > >> Hi Paul, > > >> > > >> I only ask as you seem to track this thing the best here on time-nuts, > > >> as far as I have seen, such that it is your emails that keeps me best > up > > >> to date with the progress. > > >> > > >> Cheers, > > >> Magnus > > >> > > >> On 2020-08-05 19:21, paul swed wrote: > > >>> Hi Magnus been a while since have emailed. > > >>> Its one site that was a test transmitter. Its in New Jersey, USA. > > >>> The goal of the testing I believe is to establish the viability of an > > >>> alternate PNT reference to GPS. Additionally the ability to > communicate > > >>> some level of message broadcast. This should be identical to > proposals > > I > > >>> have heard of in Europe. > > >>> But I have no direct relationship to any of this. Like you, a very > > >>> interested observer and hope that eLORAN wins the battle. > > >>> Unfortunately there are many alternate proposals such as using other > > >>> satellites. Hmmm if I wanted to advance my career in the Air Force or > > >> Space > > >>> Force (Yes thats actually real now). > > >>> Would I select the lowly reliable as heck eLORAN at sub $100 M/year > to > > >>> operate. Or the glorious space based proposals in $B region. Never > mind > > >>> that at least 3 countries now have demonstrated killer satellites. > > >>> Sorry for that editorial. > > >>> Regards > > >>> Paul > > >>> WB8TSL > > >>> > > >>> On Wed, Aug 5, 2020 at 11:04 AM Magnus Danielson <[email protected] > > > > >> wrote: > > >>> > > >>>> Hi, > > >>>> > > >>>> Do you know that they would do test with two actual transmitter > sites? > > >>>> > > >>>> Cheers, > > >>>> Magnus > > >>>> > > >>>> On 2020-08-05 16:00, paul swed wrote: > > >>>>> Hello to fellow time nuts. > > >>>>> Warm up those old Austrons. eLORAN out of New Jersey has been on > the > > >> air > > >>>>> intermittently prior to a test run next week. Due to the storm they > > >> have > > >>>>> lost power and should have it back today or tomorrow. > > >>>>> The intention will be on the air operation till the 20th. That's a > > long > > >>>>> run. Nice. > > >>>>> Seems the Austron 2100s can be had for reasonable money these days > > >> also. > > >>>>> Enjoy. > > >>>>> Paul > > >>>>> WB8TSL > > >>>>> _______________________________________________ > > >>>>> time-nuts mailing list -- [email protected] > > >>>>> To unsubscribe, go to > > >>>> http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > > >>>>> and follow the instructions there. > > >>>> _______________________________________________ > > >>>> time-nuts mailing list -- [email protected] > > >>>> To unsubscribe, go to > > >>>> http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > > >>>> and follow the instructions there. > > >>>> > > >>> _______________________________________________ > > >>> time-nuts mailing list -- [email protected] > > >>> To unsubscribe, go to > > >> http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > > >>> and follow the instructions there. > > >> > > >> _______________________________________________ > > >> time-nuts mailing list -- [email protected] > > >> To unsubscribe, go to > > >> http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > > >> and follow the instructions there. > > >> > > > _______________________________________________ > > > time-nuts mailing list -- [email protected] > > > To unsubscribe, go to > > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > > > and follow the instructions there. > > > > > > _______________________________________________ > > > time-nuts mailing list -- [email protected] > > > To unsubscribe, go to > > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > > > and follow the instructions there. > > > > > > > > > _______________________________________________ > > time-nuts mailing list -- [email protected] > > To unsubscribe, go to > > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > > and follow the instructions there. > > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
