Monitoring and Analysis of SAR Satellite Signals Using a Ground Early Warning Receiver

In this paper, a ground early warning receiver is introduced and explained for the reception and monitoring of signals from a space-borne synthetic aperture radar. This receiver can be used for various electronic warfare applications and implemented in two sectors of time parameter detector and frequency parameter detector. It can measure the signal power, bandwidth, central frequency, pulse width, pulse repetition frequency, antenna pattern shape, and imaging duration time from the received signal. In section of frequency parameter detector, the spectrum analyzer is used. Based on this receiver, a new method is invented for recognizing LFM signal from other pulse compression methods. Also, in this paper, a technique is demonstrated for identifying SAR signals from other signal sources and estimation imaging parameters. At the end of this report, several cases of success in receiving signals from COSMO-SkyMed and FIA-Radar are listed and some of the obtained parameters from signals are compared with the references. Also, features of space-borne SAR signals are described. in which bandwidth, pulse repetition frequency, imaging duration time, and power density are investigated using analytical relations.