Synthetic aperture radar device and signal processing device

Due to the impact of movement on a synthetic aperture radar device during observation, the frequency of a reception signal is changed from the frequency at the time of transmission. As a result of this kind of Doppler effect, there has been a problem such that azimuth ambiguities are generated in a synthetic aperture radar image. This synthetic aperture radar device is provided with the following: an antenna unit that emits a transmission signal and receives a transmission signal reflected by a target; a transmission unit that generates a transmission signal by inter-pulse modulation and transmits the same to the antenna unit; a reception unit that outputs, as a reception signal, the transmission signal received by the antenna unit; and a radar control unit that controls the chirp rate of the transmission signal generated by the transmission unit, on the basis of the orientation direction of the radar beam emitted from the antenna unit. Due to this configuration, with respect to a range-compressed reception signal, range-direction peak shift arising due to the impact of Doppler effect can be compensated for, and azimuth ambiguity generated in a synthetic aperture radar image can be suppressed.