Changes

''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 widely accepted text book for astronomic calculations.  

The calculations are, however, quite involved; 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

[http://klaus.e175.net/solarpositioning Klaus Brunner]. It was also a valuable help for debugging

[http://klaus.e175.net/solarpositioning Klaus Brunner]. It was also a valuable help for debugging

the Arduino implementation.

the Arduino implementation.