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    Re: Doing my homework
    From: Stan K
    Date: 2016 Nov 3, 18:52 -0400
    Tony,

    You might consider using Celestial Tools to check your work.  Here is the Ageton output for your problem:
    TonyOzJupiterAgeton.jpg
    The only notable difference is that Celestial Tools uses the nearest tabulated value for t and Dec, without interpolation, which is the way the Ageton tables are expected to be used, judging from the examples in the H.O. 211 book.

    Stan


    -----Original Message-----
    From: Tony Oz <NoReply_TonyOz@fer3.com>
    To: slk1000 <slk1000---.com>
    Sent: Thu, 3 Nov 2016 18:05
    Subject: [NavList] Re: Doing my homework

    Dear John,
    Thanks for reassuring me! :)
    Yes, one can/should have a quick look at his compass for the azimuth estimation. But for now I would consider that as cheating. I'd like to understand the basics of it.
    I do understand that Jupiter was to the east of me, so t should be positive. May be this is just a quirk of the work-sheet since it is not official after all. The work-sheet and all the tables are "homebrew", so to say.
    So, the lesson I must take from this is: to always calculate LHA counting from me to an object WESTWARDS. I.e. - LHA is not an arithmetic summ of GHA with LonAP.
    Now back to the given work-sheet: since LHA is nowhere actually used - the step 1 should probably be re-phrased to calculate t from GHA and LonAP respecting +/- sign of LonAP operand. Then in my case t would be positive and I get the correct Zc in step 8.
    Thanks again!
    Warm regards,
    Tony

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