In a message dated 11/14/2002 4:38:07 AM Eastern Standard Time, Ed Cannon <ecannon@mail.utexas.edu> writes: >I think >he was using a telescope, Right - a 6" f8 Dobsonian >I wish I could determine the phase >shift time, but it's just a bit too tricky given my >rustic observing method. There are probably 2 way to do it. First, record the minute where the brightness of the 1st flashing surface is the same as the brightness of the 2nd flashing surface. The second way (assuming that you see the entire flashing sequence)is if you record the time of the 1st flash and the last flash and take the mid-point. Rob Matsond stated a while ago that 1 minute accurace is probably good enough. >I have a bit of a problem in doing PPAS reports on it, >because of its phase shift. Its actual flash period now >is 22.6 seconds >So, >which of the following is the correct PPAS report? > >89- 41 A 02-11-14 03:22:03.0 EC 418.1 0.2 37 11.30 +3.5->inv >89- 41 A 02-11-14 03:22:03.0 EC 339.0 0.2 15 22.60 +3.5->inv If the actully flash period is 22.6 seconds report that time. IMO you are seeing the flashes of (what I call) the phantom surface that I reported in a couple of posts: http://www.satobs.org/seesat/Oct-2001/0177.html http://www.satobs.org/seesat/Nov-2002/0010.html I think you're missing the main show. Wait about 5-10 minutes after the 22.6 flash period ends and try again. You should see the more typical 22.6 to 11.3 to 22.6 second flash periods. From my earlier post: 89-041 A 02-11-14 03:18:17.33JDG 451.9 0.3 20 22.59 +5.5->inv 89-041 A 02-11-14 03:35:14.08JDG 530.9 0.3 47 11.30 +2.0->inv Your PPAS report correspondes to the first report. Austin, TX should see Superbird A about 3 minutes before Maryland - so your phase shift should have occurred at about 03:27:30 UTC last night. -- Cheers, Don Gardner 39.1799 N, 76.8406 W, 100m ASL http://hometown.aol.com/mir16609/ http://www.howardastro.org/ ----------------------------------------------------------------- Unsubscribe from SeeSat-L by sending a message with 'unsubscribe' in the SUBJECT to SeeSat-L-request@lists.satellite.eu.org http://www.satellite.eu.org/seesat/seesatindex.html
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