Study on the main performances of interferometric radiometers with a rotating array

	Study on the main performances of interferometric radiometers with a rotating array
	Yin, Honggang; Lan, Ailan; Zhang, Shengwei
	2014
会议名称	Earth Observing Missions and Sensors: Development, Implementation, and Characterization III
会议日期	October 13, 2014 - October 15, 2014
会议地点	Beijing, China
英文摘要	When observing unchanging targets or slow-changing targets, a rotating array can be used instead of a stationary array in an interferometric radiometer to reduce the complexity and the cost. The configuration of a stationary array determines its coverage in spatial frequency domain. But for a rotating array, the baselines were distributing on a series of concentric circles with radiuses of the baseline lengths, no matter what its configuration was. According to the characteristics of the distribution of the baselines, the expressions of system sensitivity and spatial resolution of a rotating interferometric radiometer were deduced in thwas paper. For a rotating interferometric radiometer with big synthetic aperture, like the Geostationary Interferometric Microwave Sounding (GIMS) prototype, it was very difficult to find a suitable calibration source to measure the system sensitivity. Therefore, the system sensitivity of the GIMS prototype was estimated based on the sensitivity of all channels by the sensitivity formula. Since the array factor of an interferometric radiometer was the pulse response of a point target, the spatial resolution of the GIMS prototype obtained by imaging an artificial quasi point target was used to demonstrate the formula in this paper, and the results were nearly identical. In addition, some different window functions were used to weight visibility samples of the prototype, and their effects on the sensitivity and the spatial resolution were analyzed. The principle of selecting the weighted window was described at the end. © 2014 SPIE.
收录类别	EI
会议主办者	Ministry of Earth Sciences; National Aeronautics and Space Administration (NASA); State Key Laboratory of Remote Sensing Science; The Society of Photo-Optical Instrumentation Engineers (SPIE)
会议录	Proceedings of SPIE - The International Society for Optical Engineering
会议录出版者	SPIE
语种	英语
ISSN号	0277-786X
ISBN号	9781628413311
内容类型	会议论文
源URL	[http://ir.nssc.ac.cn/handle/122/4351]
专题	国家空间科学中心_空间环境部
推荐引用方式 GB/T 7714	Yin, Honggang,Lan, Ailan,Zhang, Shengwei. Study on the main performances of interferometric radiometers with a rotating array[C]. 见:Earth Observing Missions and Sensors: Development, Implementation, and Characterization III. Beijing, China. October 13, 2014 - October 15, 2014.