are generated by the despin control electronics based on the selected inertial reference sensor (sun or star) and the bearing and power transfer assembly ( BAPTA) ... The series of configuration drawings assumes a null condition with the payload antenna pointing towards the earth line of sight. ... Similarly, the platform circumference is divided into 24fz or 16 sectors by means of the shaft angle encoder.
|Title||:||System Design of the Pioneer Venus Spacecraft. Volume 9: Attitude Control/mechanisms Subsystems Studies|