Geocarto International ( IF 3.8 ) Pub Date : 2021-05-20 , DOI: 10.1080/10106049.2021.1933209 Vijay Pratap Yadav 1 , Rajendra Prasad 1 , Ruchi Bala 1 , Prashant K. Srivastava 2 , V. S. K. Vanama 3
Abstract
The dual polarimetric study including degree of polarization () and energy span (λ1+ λ2) for vegetation targets infer the accuracy of vegetation algorithms. The Sentinel – 1A and ALOS - 2 satellite data were utilized for dual polarimetric radar vegetation index (DPRVI), polarimetric radar vegetation index (PRVI) and radar vegetation index (RVI) computation and simulation of backscattering coefficient (σ0 (dB)) at VV polarization. The DPRVI, PRVI and RVI were computed at VV + VH and HH + HV polarizations, respectively. The simulation of σ0 (dB) at HH + HV can be show better results than VV + VH polarization using derived radar vegetation descriptors (V). The DPRVI, PRVI and RVI showed higher R2 and lower RMSE values at L – band than C - band. The DPRVI at L – band (HH + HV polarization) was indicated highest R2 = 0.91 and lower RMSE =0.31 (dB) among all proposed V in the algorithm.
中文翻译:
基于Sentinel-1A(C波段)和ALOS-2(L波段)SAR数据的一阶微波散射算法对双极化雷达植被指数的评估。
摘要
双极化研究,包括极化度()和能量范围(λ 1 +λ 2),用于植被指标推断的植被算法的准确性。哨兵- 1A和ALOS - 2个卫星数据用于双偏振雷达植被指数(d P RVI),偏振雷达植被指数(PRVI)和雷达植被指数(RVI)计算和后向散射系数的模拟(σ 0(dB)的)在VV极化时。D P RVI,PRVI和RVI分别在VV + VH和HH + HV极化下计算。σ的仿真0(分贝)在HH + HV可显示出比使用衍生雷达植被描述符(V)VV + VH偏振更好的结果。D P RVI,PRVI和RVI显示更高的R 2并且L波段的RMSE值低于C波段。在算法中所有建议的V中,在L波段(HH + HV极化)的D P RVI被指示为最高R 2 = 0.91而较低的RMSE = 0.31(dB)。