#22702 = 93- 42 C = GPS 2-21 r2 (PAM-D) OIG has started to post fresh data again, including five elsets over the final day of this decayer and, in the past few minutes, several missed SpaceCom decay warnings. The final elset... GPS 2-21 r2 3.0 1.5 0.0 6.5 d 3.4 233 x 125 km 1 22702U 93042C 00036.92316574 .29930517 63367-6 51302-3 0 7097 2 22702 34.4930 339.4695 0082065 263.7476 170.9951 16.35085860152757 ... shows it running 114 seconds early on my latest prediction, which had been based on elsets more than 30 hours old. SpaceCom puts the decay at Feb 5 22:56 +-1m, near perigee on that very orbit, but I show it surviving for two (or at least one) further orbits with the decay just after perigee to the W of Australia near 32.9 S, 104.4 E at Feb 6 01:56 +-90m. That orbit would take it N of Perth at 01:58 UTC and NE across Australia to Townsville, Queensland at 02:06. The next landfall would have been near Los Angeles at 02:32. My prediction for the final couple of orbits: GPS 2-21 r2 3.0 1.5 0.0 6.5 d 3.4 215 x 124 km 1 22702U 93042C 00036.97136626 .46401630 98459+0 68310-3 0 97097 2 22702 34.4918 339.1094 0069437 264.2711 94.9368 16.38553576152764 GPS 2-21 r2 3.0 1.5 0.0 6.5 d 3.4 184 x 118 km 1 22702U 93042C 00037.03219745 .78966994 38411+1 67600-3 0 97097 2 22702 34.4904 338.6514 0050501 264.9370 94.4863 16.45749096152778 Thanks (and commiseration's) to Ed Cannon, Jim Nix, Don Gardner and Wayne Hughes for the negative obs of this. Perhaps SpaceCom is/was correct after all :( #26043 = 99- 73 B = Cosmos 2368 r1 This enters eclipse at far-southern latitudes and leaves eclipse near 58 deg N while northbound at about 06h local time. I show this decaying at Feb 7 17:52 +-6h near 39.9 N, 78.0 W. This is in daylight while it is SE-bound over the NE USA, between Pittsburgh and Washington DC. SpaceCom puts the decay more than one orbit earlier, while over NE Australia at Feb 7 15:49 +-14h near 21.2 S, 148.0 E. My prediction for the final orbit: Cosmos 2368 r1 4.0 0.0 0.0 5.0 d 12 134 x 117 km 1 26043U 99073B 00038.72199819 .73931907 44021+1 36211-3 0 91199 2 26043 62.7863 172.5326 0012633 110.1785 249.9575 16.55232988 6638 See http://www.wingar.demon.co.uk/satevo/dkwatch/ for more details. Alan -- Alan Pickup | COSPAR 2707: 55d53m48.7s N 3d11m51.2s W 156m asl Edinburgh | Tel: +44 (0)131 477 9144 Fax: +44 (0)870 0520750 Scotland | SatEvo page: http://www.wingar.demon.co.uk/satevo/ ----------------------------------------------------------------- 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 Feb 06 2000 - 12:37:42 PST