Assalamou 3alaykoum,
I was looking through all the available methods in this file: https://1x.ax/islamic-network/libraries/prayer-times/~files/master/src/PrayerTimes/Method.php
and was wondering if it is possible to get links to references or sources for the angle parameters. I am currently developing a physical adhan clock and would like to understand better how these angles are chosen based on each region.
Jazzakoumou Allah.