Re: linux program

From: B Magnus B{ckstr|m (
Date: Sat Dec 15 2001 - 12:45:51 EST

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    On Wed, 12 Dec 2001, Roger wrote:
    > Hi,
    > I'm looking for a command line program that if given the TLE, time and
    > location (mine), would calculate the latitude and longitude of where directly 
    > over earth the object is.
    SatTrack has a few command-line utilities for pass prediction.
    Bester Tracking Systems ( seem to have removed the
    free version from their website, but it seems to be available
    ready-packaged for some systems:
    Debian Linux:
    > Short of that, where would I find the formula for calculating the location?
    The "formula" you're after is the SGP4/SDP4 satellite propagation model,
    which is documented in a number of places (check the FAQ), plus some
    vectorial computation to get the azimuth and elevation at a given time.
    If you're interested in writing your own program, you can have my C 
    language SGP4/SDP4 source code.  It's a translation of NORAD's Fortran
    code and isn't extensively tested.
    Happy hacking & clear skies,
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    This archive was generated by hypermail 2b29 : Sat Dec 15 2001 - 12:51:31 EST