Hi Andy, Both passes are consistent with Tiangong-2 [41765/16057A], A Chinese space station. Regards, Cees On Wed, Dec 5, 2018 at 11:37 PM AjK via Seesat-l <seesat-l_at_satobs.org> wrote: > > Hello All, > > This is slightly off topic but I am reaching out to your community as I > know many of you are best placed to resolve my dilemma. > > The UNID is "off topic" because it's not visual, it's a radar return in > unusual circumstances. > > I recently built a meteor bi-static radar detection system in my attic. It > uses the French military Graves radar[1] tuned to 143.050MHz > > My system has been working well for meteors. However, since I started the > system I have been trying to see if it could detect the ISS. Many others > with similar systems said their systems often saw the ISS as it flew > through the radar beam. However, in Scotland, I am a long way from where > the beam would illuminate it. To date, I have been unsuccessful on every > attempt when I have known the ISS was within the radar beam and also over > my horizon up here in Scotland. It's been mildly disappointing so far but > I have not given up as yet. > > However, last night (2018-12-04 at 02:10:39UTC) my system registered a very > strong return. Roughly 90 minutes later at 03:40:46UTC it returned, again > another strong signal both with clear satellite velocity doppler shifts. > However, the ISS was about as far from the radar beam as you can get > (southern hemisphere). > > I have posted to the Graves Italia Echoes facebook group the waterfall > images[2] and a request for help. You can see the waterfall image captures > on that post. > > Any help identifying what this could have been would be appreciated. > > regards, > --Andy Kirkham > > [1] https://en.wikipedia.org/wiki/Graves_(system) > [2] https://www.facebook.com/groups/1885781291708894/ > _______________________________________________ > Seesat-l mailing list > http://mailman.satobs.org/mailman/listinfo/seesat-l _______________________________________________ Seesat-l mailing list http://mailman.satobs.org/mailman/listinfo/seesat-lReceived on Thu Dec 06 2018 - 03:09:47 UTC
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