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    Re: All Haversine Time Sight
    From: Tony Oz
    Date: 2018 Sep 8, 13:59 -0700

    Dear Greg!

    Thank you for sharing this nice find!

    My all-haversine tool-box groving bigger and bigger.

    There is one little thing I do not like about these formulas: the same-name vs contrary-name gimmickry.

    I'd rather prefer one set of rules (North and East are positive, South and West are negative) and one canonical form for each formula. Like Lat = ZD + Dec which is always correct if we follow the sign rule.

    I tried the sign rule with the "same-name" formulation of hav(t) - it seems to work OK. Now I'm checking if it works with the longhand all-haversine SR as well.

    Please comment.

    Warm regards,


    60°N 30°E

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