联合Topex/Poseidon与Envisat高度计数据监测我国大陆地表覆盖变化  

Monitoring the Land Cover Change of China with the Combination of the Topex/Poseidon and Envisat Radar Altimetric Data

作　　者：柯宝贵[1] 章传银[1] 常晓涛[2] 张利明[1] 

机构地区：[1]中国测绘科学研究院,北京100830 [2]国家测绘地理信息局卫星测绘应用中心,北京100830

出　　处：《测绘学报》2015年第9期1048-1055,共8页Acta Geodaetica et Cartographica Sinica

摘　　要：首次联合Topex/Poseidon(T/P)与Envisat高度计数据,提取了2002年5月至2005年5月期间两高度计Ku波段的后向散射系数,采用连续张力曲线样条格网化方法,有效地解决了数据稀疏区容易出现极值以及对数据密集区进行格网化时不平滑的问题,得到了格网时间序列数据,分析了T/P与Envisat两高度计后向散射系数的统计差异,进而讨论了我国陆地覆盖的空间分布特征,定性地研究了内蒙古高原、华北平原、东北平原、青藏高原、云贵高原、黄土高原、长江中下游平原的后向散射系数的成因机制及其随时间的演化规律,研究结果可为因自然灾害和环境变化而导致地表覆盖变化的监测提供决策支持。The Ku band backscatter coefficients data have been extracted since 2002.5to 2005.5from Topex/Poseidon（T/P）GDR-M and Envisat OPR datasets.Based on the continuous tension spline curve gridding method,the time series gridding data was obtained.Then the two different backscatter coefficients time series were compared.Carefully analysis and discussion on the spatial distribution characteristic of the backscattering coefficients in Inner Mongolia plateau,North China Plain,Northeast China Plain,the Qinghai Tibet Plateau,the Yunnan Guizhou Plateau,the Loess Plateau,the Yangtze River Plain indicate that both technologies can be used for monitoring natural disasters and potential environmental change of China and providing decision support for monitoring time series for land cover change.

关 键 词：后向散射系数 张力曲线样条 TOPEX/POSEIDON ENVISAT 卫星雷达测高 

分 类 号：P237[天文地球—摄影测量与遥感]