项目名称: 基于TerraSAR-X/TanDEM-X极化干涉数据森林树高反演
项目编号: No.31260156
项目类型: 地区科学基金项目
立项/批准年度: 2013
项目学科: 农业科学
项目作者: 岳彩荣
作者单位: 西南林业大学
项目金额: 50万元
中文摘要: 森林树高是最重要的森林参数之一,它与森林蓄积量和生物量直接相关。研究大面积获取森林高度信息的技术对森林可持续经营、森林生物量的定量测算以及全球碳循环研究具有重要意义。近10年来发展起来的极化干涉(POLINSAR)技术具备了对地观测目标的三维测量能力,通过极化干涉SAR,采用散射矩阵分解技术可以实现森林多种散射机制相位中心分离及不同干涉相位提取,从而估测森林的高度信息。本研究以滇中优势森林类型云南松林和西双版纳热带雨林为研究对象,采用德国Terra-X/TanDEM-X卫星获取的全极化数据为信息源,利用极化干涉的理论和方法,研究森林全极化信息相干最优化方法和散射特征分解方法,在此基础上,研究基于植被相干散射模型的树高估测技术,并针对上述两种森林类型进行树高反演、精度评价,最终建立一套利用微波极化干涉技术获取森林树高信息的方法和技术。
中文关键词: 森林树高反演;极化干涉;TerraSAR-X/TanDEM-X;;
英文摘要: Tree height is one of the most important parameters of the forest, and it is directly related to the forest biomass and volume. The research for the technology on obtaining the volume information of forest height is of great importance to sustainable forest management, the forest biomass quantitative estimation and global carbon cycle studies. The technology developed in the past 10 years, polarimetric SAR interferometry (POLINSAR) with the capability of a three-dimensional measurement for the targets on the earth by using scattering matrix decomposition technology, can be used to obtain the separation of forest multiple scattering mechanism phase center and the extraction of different interferometric phase, and then to assess the information of the forest height. The forest of Pinus yunnansis ,the dominant forest type in the central of Yunnan, China, and tropical rain forest in Xishuangbanna as the research object,the polarization data come from Germany TerraSAR-X/TanDEM-X satellites as information source, and using the theory and methods of polarization interference, we can research the optimization method of information on the polarization coherent and the method of scattering characteristics decomposition. And based on this, the study of tree height estimation technology based on the RVoG(Random Volume over
英文关键词: forest height retrieval;polarimetric interferometry;TerraSAR-X/TanDEM-X;;