Hi Allen/list Here's a couple of lists based on Mike's classfd.tle for today and May 14, 2017. The window around Ross 128 was set at 30x20 degrees to generate these lists. If you take the time to identify these space craft many are old (in grave yard orbit) payloads that had a communications or sigint function. DSP F17, WGS5 and AEHF-2 are likely still operational given their orbital behaviours. However, even the old graveyarded payloads could still emit RF. DSP F2 launched in 1971 is still active on S-band with it's TT&C beacon even thou it is in a graveyard orbit... The challenge with classifieds is that C-band is not a normal band I'm aware they use for communications. S, X, Ku, Ka yes... Maybe an old payload with something on C-band ? Plenty of choice in this list as most were/are communication or sigint missions. Today: 2017-05-13T00:53:55 11560 13.0 -14.6 d 36114.19 km 2017-05-13T00:53:55 12930 13.2 -9.4 d 39189.64 km 2017-05-13T00:53:55 15543 12.9 -9.5 d 36843.48 km 2017-05-13T00:53:55 16117 13.0 81.0 d 36267.57 km 2017-05-13T00:53:55 16119 13.2 41.0 d 36049.04 km 2017-05-13T00:53:55 20202 13.3 57.2 d 36562.54 km 2017-05-13T00:53:55 20355 13.3 -7.5 d 36614.47 km 2017-05-13T00:53:55 23132 12.9 229.9 d 36050.18 km 2017-05-13T00:53:55 23435 12.9 107.2 d 36123.22 km 2017-05-13T00:53:55 38254 13.0 -68.3 d 36172.94 km 2017-05-13T00:53:55 39168 12.8 -67.3 d 36300.21 km 2017-05-13T00:53:55 90105 12.3 884.7 d 27406.84 km May 14th: 2017-05-13T00:53:55 11560 13.1 35.5 d 36048.62 km 2017-05-13T00:53:55 12930 13.2 29.4 d 39234.62 km 2017-05-13T00:53:55 15543 12.9 48.6 d 36777.26 km 2017-05-13T00:53:55 16117 13.0 81.0 d 36267.57 km 2017-05-13T00:53:55 16119 13.2 41.0 d 36049.04 km 2017-05-13T00:53:55 20202 13.3 57.2 d 36562.54 km 2017-05-13T00:53:55 20355 13.3 25.2 d 36618.90 km 2017-05-13T00:53:55 23132 12.9 229.9 d 36050.18 km 2017-05-13T00:53:55 23435 12.9 107.2 d 36123.22 km 2017-05-13T00:53:55 38254 12.8 53.6 d 36424.43 km 2017-05-13T00:53:55 90105 12.3 884.7 d 27406.84 km Regards, Scott Tilley On 07/21/2017 07:45 AM, Allen Thomson via Seesat-l wrote: > > Speaking of geosynchronous satellites, in investigating the origin of an odd radio signal coming from the direction of the star Ross 128, one of the possibilities studied ( http://seti.berkeley.edu/ross128.pdf , Figure 2 ) is that the signal came from a GEO satellite. However, in checking for candidate sources, "The satellite locations were derived from Two Line Element (TLE) sources provided by the online space situational awareness (SSA) services, open to the public, provided by the U.S. Strategic Command (USSTRATCOM)." Which, of course, leaves out the satellites that aren't in the public USSTRATCOM catalog. It might be interesting to extend the check using a fuller list of orbital elements. > _______________________________________________ > 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 Fri Jul 21 2017 - 21:34:11 UTC
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