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    Re: almanac SHA
    From: Paul Hirose
    Date: 2013 Apr 21, 20:20 -0700

    I wrote:
    > But in this case
    > the vital point is not which model is more modern, but which one matches
    > the software that computed the Nautical Almanac.
    
    On second thought, I think the actual epoch at which the coordinates are
    valid is more important than the intended epoch. Therefore, if a more
    accurate (compared to MICA 2.0) star catalog or precession / nutation
    model is available, it should be used to determine the epoch.
    
    I have always felt comfortable using the same star data for three days,
    and never felt any need to look into this matter. So I don't know if
    MICA 2.0 would give a result significantly different from more modern
    algorithms.
    
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