In trying to use the data provided by JSC FDO, http://spaceflight.nasa.gov/realdata/elements/ http://spaceflight.nasa.gov/realdata/sightings/SSapplications/Post/JavaSSOP/orbit/SHUTTLE/SVPOST.html I've had some difficulty reconciling it with the Flight Day Summary provided at http://shuttlepresskit.com/STS-101/flt_mls.htm. A background problem is that I haven't, for this mission or earlier missions, found a reliable source of an updated timeline/event summary. I need to know about docking/undocking so I can tell people how many objects to expect to see. I need an impulse by impulse accounting for the orbital changes, so I can estimate how far apart the objects will be and in what order they pass by. There is some sort of monstrously huge "timeline", which can only be read in that annoying Acrobat reader that chops everything up into single pages, but I've never been able to interpret the timeline into any info I can use. The Flight Day Summary lists an undock at 2000-05-26 21:32:44 (actually it gives it in some goofy local time, but I converted that). The FDO data as interpreted by Ruben Velasco, correctly I believe, gives these times of validity: STS-101 Valid from 20000526/10:15:09.957 364.5 x 378.9 km 1 26368U 00027A 00147.43853399 .00100000 00000-0 10000-3 0 9209 2 26368 51.5840 249.3973 0010640 9.8624 350.2741 15.65530067 1121 STS-101 Valid from 20000526/23:26:12.464 361.3 x 378.7 km 1 26368U 00027A 00148.01300918 .00100000 00000-0 10000-3 0 9219 2 26368 51.5843 246.4835 0012840 2.9820 357.1412 15.66126088 1211 Does the difference between 21 hours and 23 hours represent a 2-hour-long slow drift away from the ISS until OV-104 is put into a new orbit or some deeper problem? Then, for the pass for Cleveland and DC which occurs about 2000-05-27 0800, I don't have an elset for the ISS. I guess I can munge the catalog number in the first elset given above and use that. So I obtain something like: ISS hypothetical Valid from 20000526/10:15:09.957 364.5 x 378.9 km 1 86368E 00027A 00147.43853399 .00100000 00000-0 10000-3 0 9209 2 86368 51.5840 249.3973 0010640 9.8624 350.2741 15.65530067 1121 STS-101 Valid from 20000526/23:26:12.464 361.3 x 378.7 km 1 26368U 00027A 00148.01300918 .00100000 00000-0 10000-3 0 9219 2 26368 51.5843 246.4835 0012840 2.9820 357.1412 15.66126088 1211 Does that seem right? Thanks for any insight. Cheers. Walter Nissen wnissen@tfn.net -81.8637, 41.3735, 256m elevation --- Metaphysical certainty? You ask? Hmmm, well, there are death, taxes, viewing of Richard Simmons and Regis on tv, ..., your politicians are lying to you, hmmm. I guess that about sums it up. ----------------------------------------------------------------- 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 May 21 2000 - 07:26:59 PDT