Waveform Retracking and Emulation Experiment Analysis of Synthetic Aperture Radar Altimeter

doi:10.11947/j.AGCS.2017.20160213

Abstract

Abstract: Based on the synthetic aperture radar(SAR) convolution model, the convolution computation formula about the derivative of three parameters of time migration, rise time and amplitude are deduced. The SAR waveform retracking is completed using numerical integration and Fourier transform. Besides, the echo waveform under SAR model is generated using the simulation orbit, troposphere, ionosphere and tide model. The comparison shows that the shape of echo waveform under SAR model is the same as that of CryoSat-2 1 Hz SAR. The experiments show that the accuracy of SAR altimeter retracking is about 5 cm under the 20 Hz data(about 350 m resolution), which are improved compared with that of the traditional model.

Key words: synthetic aperture radar altimeter, waveform retracking, convolution computation

CLC Number:

P228

ZHAI Zhenhe, SHI Lingwei. Waveform Retracking and Emulation Experiment Analysis of Synthetic Aperture Radar Altimeter[J]. Acta Geodaetica et Cartographica Sinica, 2017, 46(2): 151-156.

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