Extracting Long/Lat from TLE's

From: Anthony Ayiomamitis (anthony@perseus.gr)
Date: Sun May 27 2001 - 05:16:59 PDT

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    Folks,
    
          How would one go about extracting a satellite's longitude and
    latitude from the TLE's? I realize that this will be a function of time
    but my question is restricted to geosats and, therefore, time as a
    confounding variable should be immaterial. I realize that geosats
    experience very small perturbations in their orbits but this is
    something I can live with (for now).
    
          I am interested in writing some software to basically parse a
    geosat TLE file and produce a list of corresponding longitudes and
    latitudes. I would like to produce results, if possible, accurate to
    within one and, preferably, two decimal places.
    
          I am setting the stage for a mini-project involving the
    photography of geosat constellations and would like to be able to
    generate the above-mentioned results at a whim's notice so as to plan my
    photo sessions and photo composition/framing.
    
    Anthony.
    
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