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    Re: Accuracy of the Time Sight
    From: Paul Hirose
    Date: 2012 May 20, 14:51 -0700

    This was an important issue back in the time sight era, so the various
    sources of error are explained and quantified in the classic old
    references such as
    
    Martin
    http://books.google.com/books?id=NP0nAAAAYAAJ&pg=PA360
    
    Raper
    http://books.google.com/books?id=-8qEAAAAIAAJ&pg=PA221
    
    and Chauvenet
    http://books.google.com/books?id=6JlzJHd15vQC&pg=PA211
    
    They all agree that errors in the observed altitude and estimated
    latitude have less effect as the body is closer to the prime vertical.
    
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