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    Moon-rise/set with Air Almanac: how to?
    From: Tony Oz
    Date: 2018 Apr 19, 10:44 -0700

    Hello!

    I'm having difficulties understanding the moonrise/moonset calculation explanations given in the AA's article on page A10, clause 12. When I try to follow the Examples there I get completely puzzled.

    • the moonrise for 55°N must be interpolated - I almost agree that the 09:36 is the correct value of the event time, but why did not they interpolate the "diff" value as well?
    • how do I get the example-given "-10" value from the F4 flap table? I far as I can see - I must interpolate there too and the value should come out less than the "10" - I entered the F4 table with "9" as the "diff" and the cell I must look-up is in the upper-left direction from the tabulated values
    • I can't see why there is no moonset on Jan 23rd: when I subtract 0h40m from the Jan 24th 00:18 I get Jan 23rd 23:38

    Could someone please help me through this calculation?

    Thank you in advance.

    Warm regards,

    Tony

    File:
    aira18_all_f4-a7-a10.pdf
       
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