The invention discloses a posture compensation method in case of mismatched side-swing push-
broom velocity in imaging of an agile
satellite. For the limitation (only the drift action caused by auto-rotation of the earth is considered) of the posture compensation method in the traditional imaging mode (the pointing direction of the
satellite to the ground is fixed), the
drift angle calculation formula is obtained under the mode according to the track posture parameter by analyzing the reason for the generation of the
drift angle under the imaging mode (namely the condition that the substellar point velocity is mismatched with the push-
broom velocity of a camera, and the pointing direction of the posture at the moment to the earth changes continuously) that the pointing direction of the side-swing push-
broom posture of the
satellite to the earth changes continuously, considering the drift action of the imaging from the three aspects such as orbital motion, auto-rotation of the earth andthe push-broom velocity of a camera and combining the basic definition of the
drift angle. On the basis, by combination of the basic principle of TDICCD (time
delay integration charged
coupling device) imaging and the yawing
control principle, the satellite posture compensation method is given, so that the imaging requirement for side-swing push and broom of the agile satellite can be met.