Andisheh moezzi - M.s.c of Electrical and Computer Engineering .Department of Electrical and Computer Engineering , shiraz University, shiraz, Iran
Mohamad Ali Masnadi-Shirazi - prof of Electrical and Computer Engineering. Department of Electrical and Computer Engineering , shiraz University, shiraz, Iran

Radars( RAdio Detection And Ranging) are used in many contexts, including meteorological detection of precipitation, measuring ocean surface waves, air traffic control, police detection of speeding traffic, and by the military.There are active and passive radar sensors.An imaging radar works very like a flash camera in that it provides its own light to illuminate an area on the ground and take a snapshot picture, but at radiowavelengths. A flash camera sends out a pulse of light (the flash) and records on film the light that is reflected back at it through the camera lens. Instead of a camera lens and film, a radar uses an antenna and digital computer tapes to record its images. In a radar image, one can see only the light that was reflected back towards the radar antenna.

Radar imaging, backscatter, Azimuth resolution, Range resolution,SAR