Re: Optical sighting orbit determination method

From: Bjoern Gimle (
Date: Wed Feb 04 2004 - 06:49:13 EST

  • Next message: Jim Scotti: "Re: Optical sighting orbit determination method"

    > but they don't....).
    > You mention that you have trouble if all three observations are at zero
    > declination.  That is to be expected in such a case for the longitude of the
    > ascending node and arguement of pericenter since they are undefined for an
    > orbit that has a zero inclination (as such an orbit would have).  ...
    Not true for satellite observations made from a place not on the equator !
    Do ANY of these books consider:
    1. Orbits around the Earth's center
    2. Effects of Earth gravity harmonic terms
    3. Luni-solar disturbance
    4. Effect of drag terms (if obs spans more than one pass)
    5. Earth rotation of the observer during the pass.
    6. Input of rough TLE elements
    7. Conversion of resulting elements to standard TLE forms.
    There are several programs for SATELLITE orbit determinations, eg. ELCOR, available both compiled and in C code, which does this (except for p.3).
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