> It's an old question. But I'd like to know how to create > a TLE of a satellite by it's az,el and time data. To my knowledge, all the *old* programs (elcor, pelcor, firstorb, fitelem...) found in the VSO Home Pages (orbsoft, tletools...) use RA/DEC. IOD, by George D. Lewis, uses the ObsEntry/IOD format with several variants of az/el and RA/Dec, but I have only used ObsEntry yet. -- bjorn.gimle@tietotech.se (office) -- -- b_gimle@algonet.se (home) http://www.algonet.se/~b_gimle -- -- COSPAR 5919, MALMA, 59.2615 N, 18.6206 E, 33 m -- -- COSPAR 5918, HAMMARBY, 59.2985 N, 18.1045 E, 44 m -- -- SeeSat-L / Visual Satellite Observer Home Page found at -- -- http://www2.satellite.eu.org/satintro.html -- ----------------------------------------------------------------- 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