Low-precision geocentric Sun unit vector in the inertial (TEME/MOD-ish) frame for a Julian Date — Vallado's "Sun" algorithm, accurate to ~0.01°. Returned as a unit vector; the Sun's distance is irrelevant to a cylindrical-shadow sunlit test.
Low-precision geocentric Sun unit vector in the inertial (TEME/MOD-ish) frame for a Julian Date — Vallado's "Sun" algorithm, accurate to ~0.01°. Returned as a unit vector; the Sun's distance is irrelevant to a cylindrical-shadow sunlit test.