Development of a submillimeter/far-infrared radiometer for cirrus measurements
Development of a submillimeter/far-infrared radiometer for cirrus measurements
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开发用于卷云测量的亚毫米/远红外辐射计
DOI：
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
K. F. Evans
中科院分区：
文献类型：
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作者：
D. Hayton;Peter A. R. Ade;Clare Lee;K. F. Evans
本文介绍一种用于测量亚毫米波远红外波段（10-50 cm ~（-1））卷云的低成本、轻便、紧凑的偏振敏感辐射计。由于卷云对地球的全球辐射收支有很大的影响，因此人们普遍认为，加强卷云特性的全球测量对于发展大气环流和气候预测模式（GCM）是必不可少的。我们介绍了一个项目，目前正在开发中的卡迪夫，设计和建造一种新的仪器，适合飞机部署，以测量冰水路径（IWP）沿着与卷云颗粒的大小和形状。辐射计将利用正在进行的测量，美国宇航局领导的，傅里叶变换干涉仪为基础，远红外传感器卷云（FIRSC）仪器，其中卡迪夫已密切相关。来自FIRSC活动的数据正在被用来选择对特定卷云表现出良好灵敏度的最佳辐射计通道。然而，这种新的多通道辐射计与类似的光谱仪器相比具有一些关键优势，例如：便携性，提高光学效率，多角度视场和减少积分周期，从而提高空间分辨率。辐射计将受益于应用最先进的亚毫米波/FIR偏振器和固体过滤器技术，目前正在开发的卡迪夫。
We introduce a low cost, lightweight and compact polarisation sensitive radiometer for the measurement of Cirrus clouds in the submilimeter and far-infrared region (10-50 cm-1). It is widely recognised that enhanced global measurements of cirrus properties are essential to the development of General Circulation and Climate Prediction Models (GCMs) since cirrus clouds have a strong effect on the Earths Global Radiation Budget. We introduce a project currently under development in Cardiff, to design and build a novel instrument suitable for aircraft deployment in order to measure Ice Water Path (IWP) along with cirrus particle size and shape. The radiometer will capitalise on the on going measurements of the NASA led, Fourier Transform interferometer based, Far-Infrared Sensor for Cirrus (FIRSC) instrument for which Cardiff has been closely associated. Data from FIRSC campaigns is being used to select optimum radiometer channels that exhibit good sensitivity to specific cirrus. This new multi-channel radiometer will however have some key advantages over similar spectroscopic instruments for example: portability, increased optical efficiency, a multi-angle field of view and a reduced integration period leading to an improved spatial resolution. The radiometer will benefit from the application of state-of-the-art submm/FIR polariser and solid filter technology currently being developed in Cardiff.