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题名: SNOW WATER EQUIVALENT MONITORING FROM DUAL-FREQUENCY SCATTEROMETER ON WCOM
作者: Shi, Jiancheng; Dong, Xiaolong; Zhu, Di; Xiong, Chuan; Wang, Gang; Liu, Liling; Cui, Yurong
作者部门: 微波遥感部
会议名称: IEEE International Geoscience & Remote Sensing Symposium
会议日期: JUL 23-28, 2017
会议地点: Fort Worth, TX
会议录: 2017 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM (IGARSS)
出版日期: 2017
收录类别: CPCI
页码: 1359-1362
ISSN号: 2153-6996
ISBN号: 978-1-5090-4951-6
关键词: water cycle ; satellite mission ; radar ; snow water equivalent ; snow wetness
英文摘要: Water Cycle Observation Mission (WCOM) is a mission dedicated to synergetic observations of global water cycle parameters, with emphasis on soil moisture, ocean surface salinity, snow water equivalent and frozen/thaw. WCOM implements its observation requirements by measurement of microwave emission/scattering of both the frequencies sensitive to the key parameters and also the auxiliary frequencies providing necessary atmospheric and surface roughness corrections. In order to satisfy this measurement requirements, WCOM is equipped with payloads with combination of active and passive microwave sounding capabilities of frequency from L-band to W-band. Dual Frequency Polarized Scatterometer (DFPSCAT) is one of the three payloads onboard the satellite of Water Cycle Observation Mission (WCOM). DFPSCAT is an X/Ku band rotating pencil beam scatterometer with 2-5 km resolution and 1000km swath for mapping of snow water equivalent (SWE) and freeze-thaw process. DFPSCAT achieves fine resolution by linear frequency modulation pulse compression along the elevation direction, and by unfocused synthetic aperture processing (a technique where the Doppler effect is exploited to synthesize a longer aperture to achieve an improved resolution), as well as super-resolution reconstruction by oversampling in the direction of the azimuth. Based on the payloads of WCOM mission, especially with X/Ku scatterometer and L/Ku/Ka radiometer active/passive observations, there are obvious advantages in snow water equivalent retrieval. The atmospheric correction of active and passive data should be performed before the retrieval. The estimation of SWE mainly rely on the high resolution X and Ku band scatterometer, and combined active/passive retrieval can provide more reliable SWE product. The retrieval method of SWE from X/Ku scatterometer is described, and combined active/passive retrieval is also briefly described.
语种: 英语
内容类型: 会议论文
URI标识: http://ir.nssc.ac.cn/handle/122/6278
Appears in Collections:微波遥感部_会议论文

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