Function lupnt::Illumination

• Defined in File forces.cc

Function Documentation

Real lupnt::Illumination(const Vec3 &r, const Vec3 &r_sun, Real R_body)

Computes the fractional illumination of a spacecraft.

Computes the illumination factor for solar radiation pressure.

Parameters:

• r – Spacecraft position relative to occulting body [m]

• r_sun – Sun position relative to occulting body [m]

• r – Position vector of the spacecraft relative to the occulting body.

• r_sun – Position vector of the Sun relative to the occulting body.

• R_body – Radius of the occulting body.

Returns:

Illumination factor [0,1], 0 if in shadow, 1 if fully illuminated O. Montenbruck and G. Eberhard, Satellite orbits: models, methods, and applications, Sec. 3.4.2. Berlin: New York: Springer, 2000. doi: 10.1007/978-3-642-58351-3.

Returns:

Real Illumination factor (0 to 1).