Synthetic-aperture-radar-signal processing device, method, and program

A synthetic-aperture-radar-signal processing method comprising:

• selecting, from an observed image, range bins including a signal from an isolated reflection point;
• evaluating phases in an azimuth direction in the range bins;
• designing a window function on the basis of results of the evaluation and multiplying the range bins by the window function;
• and
• correcting the observed image by estimating a phase error from the range bins multiplied by the window function.

A non-transitory computer readable recording medium storing a synthetic-aperture-radar-signal processing program, when executed by a processor, performs:

• range bin selection processing of selecting, from an observed image, range bins including a signal from an isolated reflection point;
• phase evaluation processing of evaluating phases in an azimuth direction in the range bins;
• window function multiplication processing of designing a window function on the basis of results of the evaluation in the phase evaluation processing and multiplying the range bins by the window function;
• and
• phase error correction processing of correcting the observed image by estimating a phase error from the range bins multiplied by the window function.