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→SPA Algorithm
In this paper methods have been worked out according to the book from
In this paper methods have been worked out according to the book from
''Jean Meeus: Astronomical Algorithms, Willmann-Bell, Richmond 2000 (2nd ed., 2nd printing)''
''Jean Meeus: Astronomical Algorithms, Willmann-Bell, Richmond 2000 (2nd ed., 2nd printing)''
a widely accepted text book for astronomic calculations.
a well known text book for astronomic calculations.
The calculations are, however, very extensive; for Arduino I chose the simpler PSA.
The calculations are, however, very extensive; for Arduino I chose the simpler PSA.
Implementations and references for both algorithms I found thanks to the code from
Implementations and references for both algorithms I found thanks to the code from