Satellite Orbit Plane

Fig. 3-24. Geometry for Calculation of Transit and Occupation Limits

The largest minimum angular separation for a given / occurs when apofocus is at B. If P' is the angular separation when apofocus is at B, and DA is the apofocal distance, then tan/?

If P'<pP (condition 2), then occultation of the satellite will occur, but transit may or may not occur. Finally, let a be the angular separation between the center of the planet and the spacecraft at A when apofocus is at A. Then a is given by tana

0 0

Post a comment