The spin axis is "stable" compared to the 1 d/day apparent motion of the Sun. The current flash location is near RA 02:00, and the Sun is at 14:40. So the RA of flashes decreases by about 3.9 minutes per day (west). But since Superbird A (#20040 89041A) arrives at a fixed RA 5m30s later each day, the net effect is 1.6 minutes delay in time. Geo satellites with MM<1.0027... like Superbird A, Intelsat 512, Gorizont 14, Gorizont 17, Gorizont 23 travel west relative to the Earth's surface. > I think it is about 1-1.5 minutes later each night at a given location. > > Ron Lee > > > Does the flash window for peak flash times move west or east and at > what rate? > >I seem to recall from last year that it moves west at about 4d per diem? > ----------------------------------------------------------------- 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
This archive was generated by hypermail 2b29 : Sun Nov 04 2001 - 04:46:19 EST