[time-nuts] Russian Timing Geosync Sats?
brooke at pacific.net
Wed Mar 13 14:01:22 EDT 2013
I've been told that the 150 and 400 MHz signals are still active and that in the past week or so the "timing" signals on
those frequencies from geostationary satellites (not the low orbit nav sats) are being used by some hacked Chinese cell
phones to determine position to about 1 meter, but so far have not been able to confirm that.
Peter Bell wrote:
> Tsikada was (maybe still is?) the Russian version of TRANSIT - it used
> 150MHz and 400MHz carriers, but I'm pretty sure the orbits were (like
> TRANSIT) low polar rather than Geosynchronous. You may also run into the
> name "Parus" - which was the name of the system before it was released to
> civilian use. The same satellites also carried the receivers for the
> original COSPAS system (aka SARSAT in english) - they also apparently had
> some sort of datalink capability, although the exact details are not clear
> - my guess is that now GLONASS is fully operational this datalink is the
> main reason for retaining them in operational status.
> It's also interesting that even after both the Tsikada and COSPAS programs
> were public knowledge the satellites were still given a cosmos-xxx
> designation which was normally only used for soviet military satellites
> (and launch failures). This strongly suggests that there was more stuff on
> board that they weren't talking about.
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