基于簡縮極化干涉SAR數(shù)據(jù)的森林垂直參數(shù)反演

郭勝龍; 李洋; 尹嬙; 王建峰; 洪文

doi:10.11999/JEIT150394

基于簡縮極化干涉SAR數(shù)據(jù)的森林垂直參數(shù)反演

doi: 10.11999/JEIT150394

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出版歷程
- 收稿日期: 2015-04-08
- 修回日期: 2015-09-24
- 刊出日期: 2016-01-19

Vertical Parameters Estimation of Forest with Compact Polarimetric SAR Interferometry Data

摘要

摘要: 森林區(qū)域豎直結(jié)構(gòu)參數(shù)的反演是極化干涉雷達(dá)的一個(gè)重要應(yīng)用，基于RVoG模型，運(yùn)用全極化干涉數(shù)據(jù)可成功獲得森林區(qū)域的地形估計(jì)及樹高反演。該文將基于單基線簡縮極化干涉SAR(C-PolInSAR)數(shù)據(jù)對森林區(qū)域進(jìn)行林下地形估計(jì)及樹高反演。推導(dǎo)單基線簡縮極化干涉相干系數(shù)及相干區(qū)域，根據(jù)相干區(qū)域進(jìn)行直線擬合，提出簡縮極化干涉數(shù)據(jù)下的地形相位判別準(zhǔn)則及體散射去相干估計(jì)方法，然后完成樹高反演。通過L, P波段仿真數(shù)據(jù)以及實(shí)測機(jī)載數(shù)據(jù)對上述方法進(jìn)行驗(yàn)證，獲得正確地形及樹高。簡縮極化發(fā)射波極化狀態(tài)不唯一，因此該文詳細(xì)分析不同參數(shù)的橢圓極化對地形及樹高等參數(shù)估計(jì)的影響，研究表明地形樹高受橢圓極化波影響較小，也驗(yàn)證了估計(jì)方法的穩(wěn)定性。
- 合成孔徑雷達(dá) /
- 簡縮極化干涉SAR /
- 地形估計(jì) /
- 樹高反演
Abstract: Vertical parameters estimation of forest is one of the most important applications in the Polarimetric Interferometric SAR (PolInSAR). On the basis of the Radom Volume over Ground (RVoG) model, the topographical phase and the tree height in forest area can be successfully estimated with the PolInSAR data. In this paper, the topographical phase and forest heights are obtained with single-baseline Compact Polarimetric Interferometric SAR (C-PolInSAR) data. This paper introduces the complex coherence coefficients and the coherence region of the single-baseline C-PolInSAR. Firstly, line-fitting technique is performed on the basis of the coherence region, then the criterion for estimating the topography, and the only volume de-correlation are proposed with the compact polarimetric SAR interferometry datasets. Finally, the topography and the forest heights are proposed. The simulated L, and P band data is used to validate the proposed method, and the topography and tree heights are obtained successfully. Since the transmit wave polarization state of the compact polarimetric system is not unique, this paper analyzes the influence of the elliptic-polarization with different elliptical parameters on the topographical phase and the forest heights. Results show that elliptic-polarization has a little impact on vertical parameters, which also validates the stability of the estimation method.
- SAR /
- Compact Polarimetric Interferometric SAR (C-PolInSAR) /
- Topography estimation /
- Forest heights estimation

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