Right ascension of ascending node to beta angle
[betaa] = CL_gm_raan2beta(inc,raan,alpha_sun,delta_sun)
Computes the beta angle (betaa), which is the angle between the orbit plane and the Sun direction.
The beta angle is a function of the orbit's right ascension of ascending node (raan) and inclination (inc) and the Sun's right ascension (alpha_sun) and declination (delta_sun).
Note:
Beta is a signed quantity. It is positive when the Sun direction is less than 90 degrees from the orbit's angular momentum vector.
Orbit inclination [rad] (1xN)
Orbit right ascension of ascending node [rad] (1xN)
Sun right ascension [rad] (1xN)
Sun declination [rad] (1xN)
Beta angle [rad] (1xN)
CNES - DCT/SB