Spacecraft antenna pattern control system

Abstract From the Canadian patent

A system for controlling a radiation pattern of an antenna array carried on a spacecraft, to provide and maintain a desired pattern over a preselected area remote from the spacecraft, without physical movement of the array with respect to the spacecraft even if the spacecraft is physically reoriented with respect to the remote earth area, uses sensors carried on the spacecraft, for, determining spacecraft reorientation relative to the preselected earth area so, as to provide at least one error signal responsive to any spacecraft reorientation;, a phased-array antenna system inertialessly reconfigures the array radiation pattern responsive to a set of directional pointing data; a loop …