SNOW WATER EQUIVALENT MONITORING FROM DUAL-FREQUENCY SCATTEROMETER ON WCOM

	SNOW WATER EQUIVALENT MONITORING FROM DUAL-FREQUENCY SCATTEROMETER ON WCOM
	Shi, Jiancheng; Dong, Xiaolong; Zhu, Di; Xiong, Chuan; Wang, Gang; Liu, Liling; Cui, Yurong
	2017
会议日期	JUL 23-28, 2017
会议地点	Fort Worth, TX
关键词	Water Cycle Satellite Mission Radar Snow Water Equivalent Snow Wetness
页码	1359-1362
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.
会议录	2017 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM (IGARSS)
语种	英语
ISSN号	2153-6996
ISBN号	978-1-5090-4951-6
内容类型	会议论文
源URL	[http://ir.nssc.ac.cn/handle/122/6278]
专题	国家空间科学中心_微波遥感部
推荐引用方式 GB/T 7714	Shi, Jiancheng,Dong, Xiaolong,Zhu, Di,et al. SNOW WATER EQUIVALENT MONITORING FROM DUAL-FREQUENCY SCATTEROMETER ON WCOM[C]. 见:. Fort Worth, TX. JUL 23-28, 2017.