Phase measurement compensation method for airborne interferometric SAR (synthetic aperture radar) based on synchronous internal calibration signals
A technology of phase measurement and compensation method, which is applied in the direction of radio wave measurement system, instrument, etc., can solve the problems affecting the accuracy of interferometric measurement and destroying the spectrum integrity of radar echo signal, so as to reduce the influence, reduce the amount of data and improve the accuracy Effect
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[0026] The core idea of the present invention is to simultaneously input the internal calibration signal to the multiple receiving channels while the radar receives the echo signal, so that the internal calibration signal and the radar echo signal go through the same path at the same time, have the same error history, and The phase modulation internal calibration signal is adopted to improve the phase detection accuracy of the internal calibration signal. In the data processing stage, the phase error between channels is reversed from the internal calibration signal and the error correction is performed.
[0027] The present invention will be described in detail below with reference to the drawings and embodiments.
[0028] figure 1 The block diagram of the error measurement and compensation system is given. The method includes the following steps:
[0029] Step a): Use a calibration signal source to generate a phase-modulated internal calibration signal; divide the internal calib...
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