Re: TLE and SGP4 accuracies

From: Thomas Fly (
Date: Thu Feb 19 2004 - 14:00:48 EST

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    The following also may be of interest to you:
    The MCC ephemeris evidently is the product of numerical integration of enhanced
    gravitational and atmospheric models, and there's at least the claim that:
    "You also have access to a Mission Control Center, or MCC, ephemeris during
    space shuttle missions and for the International Space Station. An ephemeris is
    simply a collection of state vectors in chronological order generated in the
    MCC. The state vectors that are generated in the MCC are far and above the most
    accurate available, and their use is highly recommended."
    Within the past week, I've added ISS "planetary encounters" to my ISS Transit
    reports, so I expect that soon there'll be more information regarding the
    accuracy of ISS TLEs, at least.
    Subscribe/Unsubscribe info, Frequently Asked Questions, SeeSat-L archive:

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