Whether a satellite at inertial position posKm (km, same frame as
sunEciUnit) is lit by the Sun, using a cylindrical umbra model: a point is
in shadow only when it sits behind the Earth (negative projection onto the Sun
direction) and within one Earth radius of the Earth–Sun axis.
Whether a satellite at inertial position
posKm(km, same frame as sunEciUnit) is lit by the Sun, using a cylindrical umbra model: a point is in shadow only when it sits behind the Earth (negative projection onto the Sun direction) and within one Earth radius of the Earth–Sun axis.