>> what program's are available to give me a TLE from >> observed position's( R/A and DEC ) at a certain time . ftp://ftp.physics.ox.ac.uk/pub/sat/programs/ibmpc/pelcor.zip (elcor.c by Paul Hirose , 71202.2014@compuserve.com ) ------------------------------------------------------------ -- bjorn.gimle@online.dextel.se +46-8-7428086 (home) -- -- bjorn@tt-tech.se +46-8-59095789 (office)-- -- 59.22371 N, 18.22857 E AND member of : -- -- seesat-l@iris01.plasma.mpe-garching.mpg.de -- ------------------------------------------------------------