A method and apparatus for controlling a gimbaled platform (108). The
method comprises the steps of computing an acquisition phase gimbal angle
rate command .omega..sub.cmd.sub.--.sub.Acq (530) from a measured LOS
angle error .DELTA..theta..sub.LOS (520) for an initial control period T
while computing an estimated LOS angle rate {circumflex over
(.omega.)}.sub.LOS (524), computing a tracking phase gimbal angle rate
command .omega..sub.cmd.sub.--.sub.Trk (532) using a controller (512)
having an output initialized with the estimated LOS angle rate
{circumflex over (.omega.)}.sub.LOS (524), and commanding the gimballed
platform (108) according to an angle rate command .omega..sub.cmd (522),
wherein the angle rate command .omega..sub.cmd (522) is the acquisition
phase angle rate command .omega..sub.cmd.sub.--.sub.Acq (530) during the
initial control period T and the tracking phase gimbal angle rate command
.omega..sub.cmd.sub.--.sub.Trk (532) after the initial control period T.