ALEC MUFFETT wrote: A.M. > Internet: alecm@crypto.dircon.co.uk A.M. > I want to try my hand at writing some (Linux Java) A.M. > satellite prediction software, with an eye towards telescope A.M. > control once the bugs start to get threshed out. Hi Alec, To put you in the picture, a good WEB reference "book" is: http://celestrak.com/NORAD/documentation/spacetrk.pdf The SGP (Standard General Perturbation) theory is the "standard" way to mathematical model and predict earth orbiting satellites. To "cut code", a good way to start is the following address. http://www.amsat.org/amsat/ftpsoft.html Because you are thinking of LINUX, look at the following in the above address: SatTrack -------- Real-time orbit simulation program with color graphics displays for Unix and Linux systems running X11R5. Controls antennas and radios. Also features a batch mode for prediction of passes over specified ground stations. Includes source code in C. Written by Manfred Bester, W6/DL5KR. It has the source code to get you under way !!! I recently wrote some GPS TLE software (my Southern Hemisphere Winter project). ftp://tie.jpl.nasa.gov/pub/dransom/sat_track/alm2tle.zip One program I wrote for this project was to "determine" the accuracy of "predictions" outputted by (SGP4) TLE software. Using IGS GPS ECEF data (accurate down to centimeters), the program converts that to LLA format to allow "testing" TLE's etc. If you were wanting to test the accuracy of your code, then you would be welcome to the program to test your "prediction" code. Drop me a line if you like. Regards, Kiwi Geoff.... ----------------------------------------------------------------- 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
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