Design and field-of-view calibration of 114-660-GHz optics of the Earth observing system microwave limb sounder
Design and field-of-view calibration of 114-660-GHz optics of the Earth observing system microwave limb sounder
复制标题
对地观测系统微波临边探测器114-660GHz光学器件的设计与视场标定
DOI：
10.1109/tgrs.2006.873234
复制
发表时间：
2006
影响因子：
8.2
通讯作者：
P. Stek
中科院分区：
文献类型：
--
作者：
R. Cofield;P. Stek
本文介绍了美国国家航空航天局Aura卫星微波测深仪共用天线的5个辐射计的光学设计和视场定标。给出了近场方向图测量的详细情况。由于FOV校准的不确定性，校准肢体排放的估计系统缩放不确定度(3/SPL sigma/)低于0.4%。辐射计口径的波束宽度和相对指向的不确定度分别为0.006/spl deg/和0.003/spl deg/。由于视场方向图的扫描相关性，模拟仪器响应的不确定度小于/SPL加MN/0.24K当量黑体温度。提出了使用飞行数据对校准进行改进的方法。
This paper describes the optics design and field-of-view (FOV) calibration for five radiometers covering 114-660 GHz which share a common antenna in the Microwave Limb Sounder instrument on the National Aeronautics and Space Administration's Aura satellite. Details of near-field pattern measurements are presented. Estimated systematic scaling uncertainties (3/spl sigma/) on calibrated limb emissions, due to FOV calibration uncertainties, are below 0.4%. 3/spl sigma/ uncertainties in beamwidth and relative pointing of radiometer boresights are 0.006/spl deg/ and 0.003/spl deg/, respectively. The uncertainty in modeled instrument response, due to the scan dependence of FOV patterns, is less than /spl plusmn/0.24 K equivalent black-body temperature. Refinements to the calibration using in-flight data are presented.