Investigating of Earth Rotation Effect on Doppler Centroid Frequency in SAR Sensor

In recent decades، SAR sensor for specific reliability and imagery at night and influence in cloud، is to be attention in remote sensing scientific centres. Because accessing to the SAR image and data in Iran is difficult، it is a challenge in Iranian space agency for SAR simulation and designing. In comparison of SAR with radar، A SAR sensor transmit thousand pulses in second and received them to making raw signals. The raw signals are processed in range and azimuth compression to making the SAR image with better resolution than radar. Many different parameters effect the Doppler centroid frequency. Earth rotation is one of these parameters that effect the azimuth processing. This paper uses a method based on the rotations of the sensor axes to reduce the earth rotation effect on SAR data. The advantages of the method is making process simple for final image with less distortion. This process lest the error due to range migration in line by line processing in azimuth direction.