NSSC OpenIR  > 微波遥感部
Alternative TitleAnalysis on Effect of Space Microwave Emission Environment on In-Orbit Calibration of Chang E-1 Microwave Sounder
崔海英; 王振占; 张晓辉; 董晓龙; 北京8701信箱
Source Publication遥感技术与应用
Keyword嫦娥一号 月球微波探测仪 在轨定标 轨道分析
Abstract"嫦娥一号"(CE-1)卫星利用微波探测仪(Chang'e Lunar Microwave Sounder-CELMS)对月球探测在国际上尚属首次。CELMS星上定标时采用冷空作为其低温定标源。当定标天线指向冷空获取宇宙背景辐射亮温时,宇宙中一些离月球距离较近的星体,如太阳、地球以及一些对月张角较大且辐射强度较高的射电源,如银心、天鹅座、金牛座等在某些时段均可进入其波束范围,是影响CELMS准确定标的主要因素。从分析CE-1的轨道入手,结合冷空星体的分布,研究了各星体相对于CELMS定标天线波束的入射角,进而得到了空间微波环境对CELMS探测结果的影响:太阳辐射对冷空天线的影响最大,其次是地球和银心,所有这些影响综合可达10 K量级。
Other AbstractChang E-1 Lunar Microwave Sounder(CELMS) is the first attempt to sound lunar soil by passive microwave sensors.Microwave emission from cosmic background is used as low-temperature reference for the in-orbit calibration of CELMS,which is usually assumed 2.7 K.But when the calibration antenna of CELMS is pointed to the space background for cold-sky calibration,some celestial bodies near the moon,such as the sun,the earth and some other radio sources with larger angular breadth from the moon and stronger radiation in microwave band ,like the galactic center ,Cygnus,Taurus etc.,may enter the calibration antenna at some certain time.These additional microwave emissions can be the main factor affecting calibration accuracy of CELMS. In this paper ,the orbit analysis of CE-1 lunar satellite is provided. The incident angles and microwave emission contributions of each celestial body entering the view of the calibration antenna are calculated according to the distribution of these microwave radiation sources. Some results of the effect of the space microwave emission environment on the calibration accuracy of CELMS are obtained.Based on these results ,it can be concluded that the biggest effect is from the radiation of the sun,followed by the earth and the galactic center. All these factors can lead to an effect with a magnitude of 10K.
Funding Project中国科学院空间科学与应用研究中心
Document Type期刊论文
Corresponding Author北京8701信箱
Recommended Citation
GB/T 7714
崔海英,王振占,张晓辉,等. 空间微波环境对“嫦娥一号”微波探测仪在轨定标影响分析[J]. 遥感技术与应用,2009,24(4):435-441.
APA 崔海英,王振占,张晓辉,董晓龙,&北京8701信箱.(2009).空间微波环境对“嫦娥一号”微波探测仪在轨定标影响分析.遥感技术与应用,24(4),435-441.
MLA 崔海英,et al."空间微波环境对“嫦娥一号”微波探测仪在轨定标影响分析".遥感技术与应用 24.4(2009):435-441.
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