Before revision: Determination and application of beta angles The where is the Ecliptic True Solar Longitude, is the Right Ascension of Ascending Node (RAAN), is the orbit's inclination, and is the Obliquity of the Ecliptic (approximately 23.45 degrees for Earth at present).
After revision: value of a solar beta angle for a satellite in Earth orbit can be found using the equationDetermination and application of beta angles The where is the Ecliptic True Solar Longitude, is the Right Ascension of Ascending Node (RAAN), is the orbit's inclination, and is the Obliquity of the Ecliptic (approximately 23.45 degrees for Earth at present).