| 摘要 |
PROBLEM TO BE SOLVED: To avoid increase in the phase compensation error of a target and to suppress the generation of image deterioration due to the influence of the compensation error of the amount of range travel of a target based on the change in the Doppler of a reflection wave caused by the motion of the target. SOLUTION: A processing for applying a high-frequency pulse being generated by a transmitter to a target via a transmission/reception antenna 3 and performing the pulse compression of an echo being received by a receiver 4 by a range compression means 5 for obtaining a row of data with a high resolution in a distance direction is repeated for a plurality of times (hits), the total of the data row in the range direction is calculated by a totaling means 101 for each hit is calculated in the time history of a range profile being obtained as a result, the section frequency analysis of the obtained row of reference data is performed by a section frequency analysis means 15, phase is compensated for by the estimation result of the amount of Doppler travel of each trace on the history of the section frequency distribution, further range compensation is made by a range compensation circuit, and the cross range compression of the obtained phase and the range profile after range compensation is made, thus generating an ISAR(inverse synthetic aperture radar) image.
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