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    Sub azimuth compass checks
    From: Randall Morrow
    Date: 2014 Oct 12, 14:38 -0700

    Can anyone give me help on the triple interpolation of pub. 229 for sun azimuth compass checks? I only have a phone app for a compass but the checks are off from 6 to even 20 degrees. What are the commonly made mistakes? I am clearly making some blunders to be so far off. Thanks in advance for your help.
    Regards, Randy

       
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