Hi -- Planet happens to be my employer. It is *incredible* that this was visible! I just wanted to note that this matches our internally-generated data, which include contributions from UHF ranging. Unfortunately our last fit for this satellite is from a day before the re-entry event, which predicts re-entry a few hours later: 0 FLOCK 2B-2 0C18 1 83096U FPP2 16276.75001157 .00000000 00000+0 60092-3 0 08 2 83096 051.6001 186.9102 0008827 222.8676 053.8809 16.39049103 05 The IMO map with our predicted track added, courtesy of Cyrus Foster, who does our orbits work: http://satobs.org/seesat_ref/misc/0C18_reentry_map.png Our most recent ephemerides are always available here: http://ephemerides.planet-labs.com/ Cheers, Adam. On Mon, Oct 3, 2016 at 4:38 AM, C. Bassa via Seesat-l <seesat-l_at_satobs.org> wrote: > William shared the video, and from it I obtained the following > measurements: > > 99999 16 776A 9004 G 20161002184350520 17 25 1711401+162553 39 S > 99999 16 776A 9004 G 20161002184351520 17 25 1724505+163473 39 S > 99999 16 776A 9004 G 20161002184352520 17 25 1736750+164397 39 S > 99999 16 776A 9004 G 20161002184353520 17 25 1750216+164502 39 S > 99999 16 776A 9004 G 20161002184354520 17 25 1804428+163487 39 S > 99999 16 776A 9004 G 20161002184355520 17 25 1818432+162045 39 S > 99999 16 776A 9004 G 20161002184356520 17 25 1831986+155650 39 S > 99999 16 776A 9004 G 20161002184357520 17 25 1846594+152635 39 S > 99999 16 776A 9004 G 20161002184358520 17 25 1901101+145608 39 S > 99999 16 776A 9004 G 20161002184359500 17 25 1914563+141116 39 S > 99999 16 776A 9004 G 20161002184400520 17 25 1928409+132422 39 S > 99999 16 776A 9004 G 20161002184401520 17 25 1940494+123416 39 S > 99999 16 776A 9004 G 20161002184402520 17 25 1951782+113908 39 S > 99999 16 776A 9004 G 20161002184403140 17 25 1957107+110316 39 S > > Site 9004 is at 1.8017W, 51.3521N, 133m. > > Fitting a circular orbit gives this result. > > 1 99999U 16776A 16276.78051887 .00000000 00000-0 50000-4 0 00 > 2 99999 51.7221 184.2405 0001000 0.0000 100.3776 16.66450838 01 > # 20161002.78-20161002.78, 14 measurements, 0.478 deg rms > > Clearly it fits the ISS inclination, though the RAAN is at least 2 deg > smaller. Since the field-of-view of the camera was 100x55 deg, there > likely is unmodelled distortion, resulting in systematic offsets in > the positions. > > Regards, > Cees > _______________________________________________ > 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 Wed Oct 05 2016 - 13:07:32 UTC
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