I enjoyed Kevin Fetter's lunar transit videos, and the ability to make flash and positional observations from his NOSS 3-3 r video: http://satobs.org/seesat/May-2006/0000.html 28538 05 004B 1775 G 20060501070944943 56 25 1843408+384860 37 R 005300 28538 05 004B 1775 G 20060501070950815 56 25 1846489+364686 67 R 005300 Site 1775: 44.6062 N 75.6910 W 100 m Thanks to algorithms provided by Scott Campbell last year, ObsReduce 1.3 supports position reductions from images. For example, for the first of the above positions, I advanced the video until the satellite was surrounded by three stars, which I designated in ObsReduce as A, B and C, then used a ruler to measure the length of four line segments required by the algorithm. Three of the segments are measured from the stars to the satellite, denoted as S. The details are recorded in the observation log, as appended. The algorithm also works with two stars, and accepts pixel coordinates as an alternative to line segments. ObsReduce is available here: http://www.satobs.org/programs/ObsReduce/ObsReduce.html Ted Molczan 2006 May 01 07:09:44.943 UTC 05004B 28538 Star A: 18:43:16.5708 +39:18:00.225 (2000.0) Mag 6.637 Star B: 18:44:05.1450 +38:31:59.100 (2000.0) Mag 6.754 Star C: 18:40:12.1970 +38:22:01.888 (2000.0) Mag 6.517 Length AB = 2.9800 Length AS = 1.9000 Length BS = 1.2000 Length CS = 2.9500 Object: 18:43:24.4848 +38:48:36.147 (2000.0) +/- 0.005 deg (default) Obs - Pred: 0.006 deg X-track; 0.047 s early, relative 9.41 day old elset: 1 28538U 05004B 06111.88862456 0.00000050 00000-0 84947-4 0 05 2 28538 63.8261 127.6526 0104000 136.2492 223.7508 13.42864127 00 28538 05 004B 1775 G 20060501070944943 56 25 1843408+384860 37 R 005300 ------------------------------------------------------------------------- Subscribe/Unsubscribe info, Frequently Asked Questions, SeeSat-L archive: http://www.satobs.org/seesat/seesatindex.html
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