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    Re: slide rule sight reduction accuracy
    From: Paul Hirose
    Date: 2009 Jun 19, 19:07 -0700

    Gary LaPook wrote:
    > But to do a simulation you do not need to get to the step of converting
    > Az to Zn since the Hc is computed from Az not from Zn.
    My program evaluates both altitude and azimuth accuracy. Since you're
    not interested in the latter, I can fake the computation and ignore the
    statistics for azimuth.
    Can't you describe the method in one compact but complete message,
    omitting other details? By now I think you have given me about 10
    messages, counting the links to the archive. And I recall a link to a
    PDF as well. I'm sure everything needed is in there, somewhere, but it's
    way too much stuff to plow through for someone who has zero interest in
    the Bygrave solution per se. In fact, up to now I've simply deleted
    messages on that subject without reading.
    All I need to know are the formulas and rules you want to use, as well
    as enough about your Bygrave device that I can figure out its trig scale
    accuracy relative to a 10" rule. (I do remember you wanted the
    computation simulated on a 10" rule as well.) It's not necessary to
    mention differences between your variant and genuine Bygrave. That'll
    just make my eyes glaze over.
    I filter out messages with attachments or HTML.
    Navigation List archive: www.fer3.com/arc
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