AL R - R cos (0 -u) 



2Rsin^ ( ~;~l 



ANTENNA 



PHASE 



CENTER 



ANTEJIMA. GROUND 

 TERMINAL 



VERTICAL 



WHEN ANTENNA PHASE 

 CENTER ROTATES TO 

 B. THE ARRAY IS SWITCHED 

 AND THE PHASE CENTER 

 JUMPS TO A. THIS CAUSES 

 A JUMP IN PHASE OF THE 

 RF CARRIER. 



Figure Bl. — Geometry of Proi)a<;al.ion Path Length to ground 

 Variation Resulting ivcm Satellite Spin IMotion 



71 



