Björn, Great, just a few days ago Patrick Wils arrived at the same conclusion! Bram Dorreman supplied data regarding the satellite itself. Thanks, and that concludes this case :-) Chris At 21:52 25/08/2002 +0200, Björn Gimle wrote: >Christian, >If it wasn't solved yet, your thanks were premature ? > >On my first check, I probably didn't use an elset file near the date given. >When I found time to check the stereo effect, and do the triangulation, I >eventually found the solution - but it could easily be done without all these >computations and image transformations ! > >The satellite is >Cosmos 1220 6.0 0.0 0.0 4.9 v 20 631 x 505 km >1 12054U 80089A 02096.43010465 .00012357 00000-0 92703-3 0 3319 >2 12054 64.9844 88.6764 0090561 151.7847 208.8222 14.99688456 69742 >recent elset: >1 12054U 80089A 02228.52406784 .00011170 00000-0 79756-3 0 7194 >2 12054 64.9800 34.7907 0076663 90.6632 270.3349 15.02500593 89572 > >At the track center: 565 km height, 1574 km range, predicted pass of pi (20) Cas >20:15:12 UTC, going right (NorthEast), track length 13s on Comet2.jpg. > >I first computed two points at equal distance and parallell directions from the >two observing locations, put these points in SkyMap .pnt (and/or .trj!) files to >have the baseline size and direction displayed in SkyMap. > >Then I rotated and rescaled the two images and the SkyMap plot to same size, >with a horizontal baseline and parallax. Unfortunately, the true stereo effect >is too large to be admired. I then measured the parallax, and compared it to the >one predicted from a known height/range. > >If you are interested in the original or processed images, or my computations, I >will mail the files (or put them on my/some homepage). > > >-- bjorn.gimle@tietotech.se (office) -- >-- 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 -- > >----- Original Message ----- >... >> Got various interesting reactions from , but the true problem wasn't solved >yet. >> ... >> Mons en Montois does not have Lat 48 deg 48' N, Long 3 deg 14' E, as >indicated to me, but 48.48 deg N, 3.14 deg E... >> >> Now the triangulation is quite good, but the exact time is unknown. An >> appearance during the first half of the exposure gives the better >> triangulation results. >> >> This must come from a quite bright object, as it is more than 1000 km away: >> >> 8 April 2002, between 20h13m and 20h40m UT >> 5 deg W, 57 deg N (+- a few degrees in Long and Lat) >> height between 250 and 350 km >> duration of the 'flare' between 7 and 10 seconds ----------------------------------------------------------------- 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
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