NSSC OpenIR  > 微波遥感部
星载毫米波亚毫米波辐射计定标的初步研究
Alternative TitleStudy on the Calibration of the Millimeter andSubmillimeter Wave Radiometer
赵瑾; 张德海; 北京8701信箱
Department国家863计划微波遥感技术实验室
Source Publication遥感技术与应用
2008
Volume23Issue:6Pages:717-720
ISSN1004-0323
Language中文
Keyword星载毫米波 亚毫米波辐射计 辐射计定标
Abstract星载微波辐射计采用平方律检波,物体的辐射功率与接收机的输出电压成线性关系.因此星载微波辐射计采用高低温两点定标.其中高温定标源采用处在环境温度下的黑体,低温定标源为冷空背景辐射.由Rayleigh-Jeans公式计算的物体的辐射功率与其物理温度成线性关系,但是随着物体频率的升高,Rayleigh-Jeans公式与Planck定律的近似误差越来越大,此时应根据Planck定律计算物体的辐射功率.从Planck定律出发,对毫米波,亚毫米波辐射计的定标方程进行了推导,并给出了高低温定标源的辐射功率在毫米波和亚毫米波段的表达式.
Other AbstractMicrowave spaceborne radiometer adopts sqare-law detection , so t he radiation of t he object received is linear to the outp ut voltage of the radiometer .Therefore ,the calibration of microwave spaceborne radiometer is performed by measuring the radiometer response to hot and cold references during operation.The hot reference is usually a blackbody under environmental temperat ure ,and the cold reference is Cosmic Background Radiation. According to Rayleigh-Jeans law ,the emission of the object is directly linear to it s absolute temperat ure.As the frequency of object increases , Rayleigh-J eans Law deviates f rom Planck's Blackbody Radiation Law ,and the radiation of object received should be calculated according to Planck's Blackbody Radiation Law.The calibration equations of millimeter and submillimeter radiometer are derived from he Planck's Law ,and t he formulas of the calibration references radiation are presented in millimeter and submillimeter bands.
Indexed ByCSCD
Funding Project中国科学院空间科学与应用研究中心
Citation statistics
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/1995
Collection微波遥感部
Corresponding Author北京8701信箱
Recommended Citation
GB/T 7714
赵瑾,张德海,北京8701信箱. 星载毫米波亚毫米波辐射计定标的初步研究[J]. 遥感技术与应用,2008,23(6):717-720.
APA 赵瑾,张德海,&北京8701信箱.(2008).星载毫米波亚毫米波辐射计定标的初步研究.遥感技术与应用,23(6),717-720.
MLA 赵瑾,et al."星载毫米波亚毫米波辐射计定标的初步研究".遥感技术与应用 23.6(2008):717-720.
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