Research on passive location method using phase difference change rate with fixed flying posture angle

In this paper, the single observer-passive location method using phase difference change rate is introduced based on existing methods. The direction of the target can be obtained with phase difference between two orthogonal interferometers on the observer and the radial distance with corresponding phase difference change rate. Then the target can be located with high speed and precision. Locating expressions are given when the observer is flying with a fixed posture angle. Simulations show that this method is effective.