At 17:23 14/05/04, elisha@techunix.technion.ac.il wrote: >Hello, > >I'm looking for source code that will convert a vector from J2000 to a TLE >file. > >I would realy appreciate your help. Yossi, Off the top of my head as the saying goes I cant provide source code, but approximate formulae are mentioned on Page B19 of the Astronomical almanac to convert from 1. J2000 to middle of year, 2. middle of Year to date for mean equinox. 3.The approximate reduction for nutation is on page B20 TLE angular co-ordinates are I understand in the frame of True Equinox of date. You may be able to finf source code from the USNO or the SOFIA code of the IAU Tony Beresford ------------------------------------------------------------------------- Subscribe/Unsubscribe info, Frequently Asked Questions, SeeSat-L archive: http://www.satobs.org/seesat/seesatindex.html
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