Title :
The design of SAR motion compensation systems incorporating strapdown inertial measurement units
Author :
Kennedy, Thomas A.
Author_Institution :
Hughes Aircraft Co., Los Angeles, CA, USA
Abstract :
A discussion is presented of several important areas in the design of synthetic-aperture radar (SAR) motion compensation systems incorporating strapdown inertial measurement units (IMUs) as the motion-sensing system. A brief review of motion compensation for SAR is presented followed by a presentation of the effects of strapdown IMU sensor and system errors on SAR image quality. These errors include the following: gyro and accelerometer scale factor and bias errors, velocity error, and platform tilt, and errors induced by limited inertial sensor bandwidth. The effects of these errors on the SAR image quality are presented in terms of the SAR impulse response. A motion compensation system conceptualization is presented wherein a strapdown IMU is attached to an antenna and transfer-aligns to the aircraft´s master navigator
Keywords :
errors; radar antennas; radar measurement; radar systems; radar theory; SAR impulse response; SAR motion compensation systems; aircraft master navigator; antenna; bias errors; image quality; limited inertial sensor bandwidth; motion-sensing system; platform tilt; scale factor errors; sensor errors; strapdown inertial measurement units; synthetic-aperture radar; system errors; velocity error; Accelerometers; Aircraft navigation; Image quality; Image sensors; Measurement units; Motion compensation; Radar imaging; Radar measurements; Sensor systems; Synthetic aperture radar;
Conference_Titel :
Radar Conference, 1988., Proceedings of the 1988 IEEE National
Conference_Location :
Ann Arbor, MI
DOI :
10.1109/NRC.1988.10933
