The applicable element set from http://spaceflight.nasa.gov/realdata/sightings/SSapplications/Post/JavaSSOP/orbit/ISS/SVPOST.html is: 1 25544U 98067A 03135.53539797 .00041100 00000-0 34010-3 0 9032 2 25544 51.6314 184.3192 0006208 117.6314 242.5472 15.59272491 15916 The principal difference appears not to be one of position, but of time; e.g., > 2:55:35 23.327 168.109 543 46.6558 N, 56.4769 W n -23.7 179.4 vs. 02:55:37 46.647 -56.505 Beyond the fact that WorldView isn't an observer-oriented planetarium type program, other differences between SkyMap (and presumably STK) are that Rob computes the moon's position more accurately than I do- though the position I compute is within a few percent of the moon's size (I use Mark Huss' Java AstroLib, which he ported from Bill Gray's "Guide" C code). You can also note that (particularly) at the high latitude you reference, the elevation angle is getting small, so slight differences in the path taken by the light are magnified, in terms of where the light ray intersects the earth's surface. ----------------------------------------------------------------- To unsubscribe from SeeSat-L, send a message with 'unsubscribe' in the SUBJECT to SeeSat-L-request@satobs.org List archived at http://www.satobs.org/seesat/seesatindex.html
This archive was generated by hypermail 2b29 : Thu May 15 2003 - 14:24:28 EDT