Study of Calibration and Remedy of Distributed Small Satellite Radar Array

Coherently combined processing of the echoes received by constellation of small satellite radars can obtain a wide swath of ground as well as a high azimuth resolution. However, the complicated errors (which mainly include three-dimensional baseline errors and gain and phrase error in this paper) have a great effect on the result of the coherently combined processing, and even make it a failure. To solve this problem, a novel calibration and remedy method is proposed in this paper. This method can estimate and remedy the spatial steering vector of received signals accurately on the basis of the baseline errors confined in a meter. Its validity is illustrated through computer simulations