Theoretical DDM Modeling of GNSS-R Fully Polarization Land Surface Geophysical Parameters

doi:10.11947/j.AGCS.2018.20180321

Abstract

Abstract: At present, most of the existing research are based on the experimental observations, few theoretical studies have been carried out.This paper has developed a fully polarization GNSS-R delay Doppler map for land geophysical parameters study. This theoretical model was based on the ocean surface GPS scattering model. After the modifications, it has been used for the land surface. As for the calculations of land geophysical parameters (bare soil and vegetation), random surface scattering model and the first order radiation transfer equation model were used. Effects of bare soil and vegetation parameters on the delay Doppler maps were simulated. In order to use the polarization information for backward inversion, our developed theoretical model has the ability of fully polarizations calculations, i.e. RR, LR, HR and VR pol. This theoretical model is a mechanism tool for the data explanation of space borne mission, experimental campaign design, data simulations and the backward inversion algorithm development.

Key words: GNSS-R, delay-doppler map, bare soil, vegetation, polarization

CLC Number:

P237

WU Xuerui, JIN Shuanggen. Theoretical DDM Modeling of GNSS-R Fully Polarization Land Surface Geophysical Parameters[J]. Acta Geodaetica et Cartographica Sinica, 2018, 47(S0): 101-108.

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