> USA 129 fix 978 x 288 > 1 24680U 96072A 00251.77660427 .00033500 00000-0 47323-3 0 18 > 2 24680 97.8580 313.1267 0492510 72.3635 293.0722 14.78866062 158 > > may be a reasonable orbit, based on the assumption that it manoeuvred > on the orbit just before Russell's observation on Sep.7 (about 18:56). Rob's COLA gives with this, and the last pre-boost elset, a nearest approach one orbit later than my initial assumption, 2000/9/7 20:36:35.24 at only 0.7 km. This is near the perigee, and 5 minutes AFTER Russell's observations on Sep.07. The 00253.80533104 elset gives a time of 20:20, and a range of 9.4 km deltaV was only about 2.75 m/s, so an error of only 0.1 s in one of the elsets, (changing a position by 792 m) would move the close approach time by almost 5 min. On the other hand, if the manoeuvre was done at perigee, about 5 min after the obs, using Russell's obs for the new orbit only introduces a 0.1 s/day error in time, and probably very small in position of the orbit. -- b_gimle@algonet.se (home) http://www.algonet.se/~b_gimle -- -- COSPAR 5919, MALMA, 59.2576 N, 18.6172 E, 23 m -- -- COSPAR 5918, HAMMARBY, 59.2985 N, 18.1045 E, 44 m -- ----------------------------------------------------------------- Unsubscribe from SeeSat-L by sending a message with 'unsubscribe' in the SUBJECT to SeeSat-L-request@lists.satellite.eu.org http://www2.satellite.eu.org/seesat/seesatindex.html
This archive was generated by hypermail 2b29 : Sun Sep 10 2000 - 09:59:07 PDT