该文概述了卫星遥感积雪监测原理,介绍了积雪判识方法,对国家卫星气象中心已有的业务化极轨气象卫星冬季旬积雪监测算法和流程进行了改进。经过比对,设计了新的可见光太阳天顶角订正模式,针对NOAA-16／AVHRR3和FY-1D／MVISR重新确定了...该文概述了卫星遥感积雪监测原理,介绍了积雪判识方法,对国家卫星气象中心已有的业务化极轨气象卫星冬季旬积雪监测算法和流程进行了改进。经过比对,设计了新的可见光太阳天顶角订正模式,针对NOAA-16／AVHRR3和FY-1D／MVISR重新确定了积雪判识变量及相应的动态积雪检测阈值,提出了概率积雪判识方法,结合多光谱阈值法建立了概率结合阈值(Probability Combined with Threshold,PCT)的积雪判识方法,并以该算法为基础建立了新的业务化积雪动态遥感监测系统。同时,用新算法对部分历史产品重新做了处理,并简要分析了1996至2003年中国地区冬季积雪分布特征。展开更多
Retrieval experiment was made for global total column ozone using the first year measurements of Total Ozone Unit (TOU) on board the second generation polar orbiting meteorological satellite of China, FY-3/A. The retr...Retrieval experiment was made for global total column ozone using the first year measurements of Total Ozone Unit (TOU) on board the second generation polar orbiting meteorological satellite of China, FY-3/A. The retrieval results were analyzed and validated by comparison with AURA/OMI, Meteop/GOME-2 global ozone products and ground-based ozone measurement data. The qualititative comparisons over the globe especially over Antarctica and the Tibetan Plateau show that the spatial and temporal distribution characteristics are consistent with OMI and GOME-2 products. The quantitative comparisons with ground-based measurements and AURA/OMI ozone product were made over 74 stations, the TOU total ozone retrieval has a 3% rms relative error compared with AURA/OMI ozone product and 4.2% rms relative error with ground-based measurements. The maximum difference between satellite retrieval and ground-based measurements was found in the Antarctica ozone hole. The TOU global ozone product is operational and distributed to all users.展开更多
文摘该文概述了卫星遥感积雪监测原理,介绍了积雪判识方法,对国家卫星气象中心已有的业务化极轨气象卫星冬季旬积雪监测算法和流程进行了改进。经过比对,设计了新的可见光太阳天顶角订正模式,针对NOAA-16／AVHRR3和FY-1D／MVISR重新确定了积雪判识变量及相应的动态积雪检测阈值,提出了概率积雪判识方法,结合多光谱阈值法建立了概率结合阈值(Probability Combined with Threshold,PCT)的积雪判识方法,并以该算法为基础建立了新的业务化积雪动态遥感监测系统。同时,用新算法对部分历史产品重新做了处理,并简要分析了1996至2003年中国地区冬季积雪分布特征。
基金supported by the National High-Tech Research & Development Program of China (2008AA121703)the National Natural Science Foundation of China (40905056)+3 种基金the State Key Labora-tory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry (LAPC-KF-2008-11)Beijing Urban Meteorology Research Fund (UMRF-200704)the 11th Five-Year Plan of National Science and Technology Key Project (2008BAC34B04-2)the National Basic Research Program of China (2005CB422200x and 2006CB403702)
文摘Retrieval experiment was made for global total column ozone using the first year measurements of Total Ozone Unit (TOU) on board the second generation polar orbiting meteorological satellite of China, FY-3/A. The retrieval results were analyzed and validated by comparison with AURA/OMI, Meteop/GOME-2 global ozone products and ground-based ozone measurement data. The qualititative comparisons over the globe especially over Antarctica and the Tibetan Plateau show that the spatial and temporal distribution characteristics are consistent with OMI and GOME-2 products. The quantitative comparisons with ground-based measurements and AURA/OMI ozone product were made over 74 stations, the TOU total ozone retrieval has a 3% rms relative error compared with AURA/OMI ozone product and 4.2% rms relative error with ground-based measurements. The maximum difference between satellite retrieval and ground-based measurements was found in the Antarctica ozone hole. The TOU global ozone product is operational and distributed to all users.
