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双基地综合孔径雷达要求具有与单基地综合孔径雷达一样的相位稳定度。典型值为1/10～1/100波长,或3.6°～36°射频相位,在X波段这相当于0.01～0.001英尺的位移。在单基地综合孔径雷达中,为了保存相位信息,通常要求发射和接收使用同一个本振,而且在非常靠近天线处设置一个运动敏感器。对于双基地综合孔径雷达来说,发射机(照射器)与接收机相隔距离可以很远,需要锁定接收机与照射器本振的相位,并测量照射器天线相位中心和接收天线相位中心的运动。必须把照射器的运动数据与接收机的运动数据组合起来,以便列出运动补偿方程。双基地综合孔径雷达的运动补偿方程证明是十分类似于单基地综合孔径雷达的运动补偿方程。基本上,照射器和接收机方程均要进行计算,就如同它们各自都作为单基地综合孔径雷达在运行一样,然后把计算结果以适当方式加以组合。
Bistatic synthetic aperture radar requires the same phase stability as single-base synthetic aperture radar. Typical values are 1/10 to 1/100 wavelength, or 3.6 ° to 36 ° RF phase, which corresponds to a displacement of 0.01 to 0.001 feet in the X-band. In a single-base synthetic aperture radar, it is usually required to transmit and receive to use the same local oscillator in order to preserve the phase information, and to set up a motion sensor very close to the antenna. For bistatic synthetic aperture radars, the transmitter (illuminator) can be very far from the receiver and need to lock the phase of the receiver and the local oscillator of the illuminator and measure the phase center of the illuminator antenna and the phase of the receiving antenna . The motion data of the illuminator must be combined with the motion data of the receiver to list the motion compensation equations. The motion compensation equation for bistatic synthetic aperture radar proves to be very similar to the motion compensation equation for a single-base synthetic aperture radar. Basically, both the illuminator and receiver equations are calculated as if each one of them were operating as a single-base synthetic aperture radar and the results were then combined in an appropriate manner.