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    Re: Unrealistic expectations
    From: Geoffrey Kolbe
    Date: 2013 Oct 12, 06:42 +0100
    It is an obvious question, I know, but did you correct your azimuths for altitude...?

    And how did you determine True North to what you consider to be a good accuracy?

    Geoffrey Kolbe

    On 06/10/2013 18:12, rgaarden wrote:

    I bought the Multiyear Interactive Computer Almanac from Willman-Bell, calculated a series of solar positions by second, and made observations during that sequence period. I then compared my observations with the calculations. I was in error on average 4.3 seconds (time) with a SD of 8.57 seconds. The sun is moving an arc minute every 4 seconds. With my current skill set locating North within 20" is out of reach.

    I am not about to argue with my own numbers. Still, it is difficult to understand how I could miss the alignment of the trailing edge of the Sun with my vertical cross hair by multiple seconds.

    What is a reasonable accuracy expectation for series of solar azimuth observations?

    Thank you.
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    Dr Geoffrey Kolbe, Riccarton Farm, Newcastleton, TD9 0SN
    Tel: 013873 76715
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