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Investigation on Vegetation Parameters Invesion Algorithm Based on Oriented Volume Model and Indoor Wide-band Measurements |
Hu Chu-feng①② Zhou Zhou①② Li Nan-jing① Zhang Lin-xi① Xu Jia-dong① |
①(National Key Laboratory of Science and Technology on Unmanned Aerial Vehicle, Northwestern Polytechnical University, Xi’an 710065, China)
②(Aeronautics Academies, Northwestern Polytechnical University, Xi’an 710072, China) |
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Abstract A vegetation parameters inversion algorithm based on Oriented Volume (OV) model is presented for vegetation with polarization characteristics, and the model and the algorithm is verified with a hard-in-loop polarimetric SAR interferometriy system constructed in an anechoic chamber. According to the vegetation characteristics of OV model, the difference of co-polarization represented dihedral scattering mechanism is discriminated as a basis for topographic phase, finally the retrieval vegetation height is gained by calculating the average and standard deviation. Next, a hard-in-loop broadband polarimetric SAR interferometric system is constructed in a controlled environment. The baseline is calibrated by two trihedral angles with height known. The experimental results show that the retrieval height is fluctuated 0.03 m to the actual height, and the inversion error is less than 0.2 m in the whole band, which explain the feasibility of model and the inversion algorithm.
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Received: 07 June 2011
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Corresponding Authors:
Hu Chu-feng
E-mail: huchufeng1982@163.com
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