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    Re: FW: A noon sight conundrum
    From: Paul Hirose
    Date: 2003 Nov 25, 14:27 -0800

    I wrote:
    >
    > I'm not sure what effect the incorrect delta T has on the meridian
    > passage computation.
    
    There's no significant effect. By switching the MICA time scale to TT
    and applying the actual offset between TT and UT1 on the date of
    Kieran's observation, I got these values for zenith distance and
    azimuth:
    
    2002 Jul 20 03:16:43.4      42 30 54.3       0 00 02.6
    2002 Jul 20 03:16:44.4      42 30 54.3     359 59 41.9
    
    Those times correspond to the UT1 times that I previously posted:
    
    2002 Jul 20 03:15:39.0      42 30 54.3       0 00 02.3
    2002 Jul 20 03:15:40.0      42 30 54.3     359 59 41.6
    
    So it looks like meridian passage occurred at 03:15:39 UT1, which
    agrees with what Kieran estimated.
    
    
    

       
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