Observations 10 MAY 2012 PART2 ---------------------------- Cosatrak 1 (Computerised satellite Tracking System). FLI ML8300M CCD camera with mechanical shutter + Trimble GPS Used with NIKON ED AF NIKKOR 80-200mm f/2.8 telephoto lens set at 146 mm focal length. Field of view 6.9 x 5.3 degrees, image scale 7.60 arc sec/pixel. Time is accurate to within 50 milliseconds. Site 0433 : Longitude 18.51294 deg East, Latitude -33.94058 deg, Elevation 10 metres-situated in Pinelands (Cape Town),South Africa FOR CLASSFD.TLE: ------------------------- 14675 84 009A 0433 E 20120510201141000 16 15 1016279+073640 38 14675 84 009A 0433 E 20120510201355000 16 15 1018380+073545 38 14675 84 009A 0433 E 20120510201650000 16 15 1020443+072752 38 14675 84 009A 0433 E 20120510201911000 16 15 1022380+072314 38 19976 89 035A 0433 E 20120510204147000 16 15 1426469+031534 38 19976 89 035A 0433 E 20120510204453000 16 15 1430299+030925 38 19976 89 035A 0433 E 20120510204718000 16 15 1433248+030348 38 19976 89 035A 0433 E 20120510204855000 16 15 1435201+025958 38 22787 93 056A 0433 E 20120510212430000 16 15 1441570+053147 38 22787 93 056A 0433 E 20120510212737000 16 15 1445027+052324 38 23132 94 035A 0433 E 20120510193328000 16 15 1433210+065750 78 +132 03 23855 96 026A 0433 E 20120510213924000 16 15 1343269+031343 38 23855 96 026A 0433 E 20120510214154000 16 15 1346159+030636 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0433 E 20120510193602000 16 15 1450149+052031 87 +102 53 37775 11 041A 0433 E 20120510212430000 16 15 1438413+053235 38 37777 11 041C 0433 E 20120510204453000 16 15 1435526+055727 38 37779 11 042A 0433 E 20120510204453000 16 15 1443132+052950 38 37810 11 049B 0433 E 20120510211650000 16 15 1353194+052944 38 37836 11 057A 0433 E 20120510213535000 16 15 1352586+055945 38 37934 11 069B 0433 E 20120510211212000 16 15 1335566+060334 38 37950 11 074A 0433 E 20120510211650000 16 15 1339374+053133 38 37952 11 074C 0433 E 20120510204147000 16 15 1455123+040914 38 38098 12 011A 0433 E 20120510195225000 16 15 1621186+051038 38 38104 12 012D 0433 E 20120510195225000 16 15 1619525+032642 38 +114 01 NOTES: ---------- (1) Trying a new way of doing things - at the moment a painful process as I have not yet got APEX to work every time so most of the above involved manual measuring. With such a large field of view there are MANY geosats and other high objects in the field of view - the record this time was 18 satellites - might even have missed one or two. This way is ideal for searching for new geosats/moved geosats etc but still needs some refining. Something appears to go wrong in APEX if exposure is longer than 99 secs so suspect its a program only reading two fields for exposure instead of three-the program computes the length of a star trail in pixels and this is based on exposure so if exposure read incorrectly the program cannot match a star field to the image as the star trail length is wrong, so it looks like an error in software I wrote but so far the location is not obvious as I am now mentally exhausted! Ive probably done something stupid. (2) Looks like PAN has moved again. Not seen where it last was. (3) Vortex 6 appears to have done an orbit change. (4) When APEX works it gives RMS error in RA as 3.18 arc sec or 0.421 pixel. (5) Thank goodness its cloudy tonight - Ive had enough of measuring for a while!!! Cheers Greg _______________________________________________ Seesat-l mailing list http://mailman.satobs.org/mailman/listinfo/seesat-l
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