Predicting Rise and Set of the Moon with the HP Prime
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09-02-2022, 04:26 PM
Post: #1
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Predicting Rise and Set of the Moon with the HP Prime
This HP PPL Prime program predicts the rise and set times of the moon for
a user-defined initial calendar date and geographic location. The user can also specify the search duration in days. The observer's coordinates should be "hard-wired" in the code using the following "example" source code. Please note the "sign" conventions. /////////////////////// // observer coordinates /////////////////////// // geographic latitude of the observer // (-90 <= degrees <= +90, 0 <= minutes <= 60, 0 <= seconds <= 60) // (north latitude is positive, south latitude is negative) obslat_deg := 28.0; obslat_min := 23.0; obslat_sec := 46.0; . . . // geographic longitude of the observer // (0 <= degrees <= 360, 0 <= minutes <= 60, 0 <= seconds <= 60) // (east longitude is positive, west longitude is negative) obslong_deg := -80; obslong_min := 35; obslong_sec := 54; . . . // altitude of the observer (kilometers) // (positive above sea level, negative below sea level) obsalt := 16.0 / 1000.0; The program will calculate and display the UTC time and topocentric (azimuth and elevation) coordinates of the moon at rise, maximum elevation and set. |
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