Night surveillance
, A controller for hovering is developed adopting cascade control loop architecture where INS system feedback is used for outer control loop while the gyro feedback is adopted for the inner control loop to attain a high bandwidth, ensuring attitude stability with accelerated response required for a steady hover, Corrective control is introduced to mitigate the disturbance sensed by the gyros before they actually do affect the output as the cascade control loop is more responsive than simply the INS loop feedback.