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    Re: Book on calculators
    From: Homer Smith
    Date: 2023 Sep 7, 12:28 -0700

    Free calculator emulators are available for some calculators. I downloaded apps from the App Store for my iPhone. The apps were free and I always have my HP 35 and HP 42s  (Free 42) with me. Documentation with the HP 42s includes a 600+ program for CN. It would be quite a chore to enter, I'm sure. It is for sun sights and it calculates GHA and Dec of the sun and also refraction and dip.

    A friend of mine wrote a program for the HP 42s that uses inputs of GHA, DEC and altitude of 2 CB's taken at the same time or of 1 CB taken at different times. The program is for a stationary observer. It consists of 162 program steps. It gives the lat/lon of 2 places where the COP's intersect.

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