DI2S improved resolution vs spoiling for X band comparison

One of the major constraints of the SAR system is the relation between the antenna dimension and the azimuth resolution. The minimum Stripmap resolution is traditionally fixed at half of the antenna physical or equivalent dimension. By using a SAR in time sharing, the Discrete Stepped Strip (DI2S) technique, patent pending, allows the acquisition of different strip images either to increase azimuth resolution or to have a multi-image system, without increasing the number of receivers or partitioning the antenna. The beam spoiling technique can also be used to improve the azimuth resolution. In this paper the DI2S technique for the improved resolution will be illustrated comparing the achievable performance of the two techniques by using the same X band SAR system.