The optimal orbital control of the dive and ascent earth observing satellite

In this paper, we propose observing the particular area which is in the emergency situation or suffered by a natural disaster with the Dive and Ascent earth observing Satellite (DAS). We selected the forces of the thrusters fixed to the satellite body three axes as the control variables, and obtained the optimal thrust patterns by using the Steepest Descent Method (SDM). Some of new ideas and study results are presented.