Submillimeter/far-infrared channel selection simulations for a cirrus radiometer
Submillimeter/far-infrared channel selection simulations for a cirrus radiometer
复制标题
卷云辐射计的亚毫米/远红外通道选择模拟
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. Evans
中科院分区：
文献类型：
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作者：
D. Hayton;P. Ade;K. Evans
我们报告的进展远红外/亚毫米辐射计正在开发的卡迪夫卷云测量。卷云的遥感对于当前大气环流模式（GCM）和气候预测的长期准确性非常重要，但需要更大的测量覆盖范围。这里报告的仪器是一个飞机部署，5通道固定波段辐射计能够检索卷云冰水路径（IWP）和平均粒子直径（Dme）使用的光谱范围为10厘米-1和55厘米-1。辐射计将利用正在进行的测量，从傅里叶变换干涉仪为基础，远红外传感器卷云（FIRSC），一个仪器，其中卡迪夫一直密切相关。信道选择模拟的初步结果在这里与信道频率和带宽的不同组合之间的比较，沿着所使用的信道的数量和云粒子形状。还证明了仪器噪声对检索性能的影响，这被证明是检索错误的主要来源。
We report on the progress of a far-infrared/submillimeter radiometer being developed in Cardiff for the measurement of cirrus clouds. Remote sensing of cirrus clouds is known to be of great importance to the long-term accuracy of current General Circulation Models (GCM) and climate prediction but with greater measurement coverage needed. The instrument reported here is an aircraft deployed, 5 channel fixed band radiometer capable of retrieving cirrus Ice Water Path (IWP) and mean particle diameter (Dme) using a spectral range of between 10 cm-1 and 55 cm-1. The radiometer will capitalise on ongoing measurements from the Fourier transform interferometer based, Far-infrared Sensor for Cirrus (FIRSC), an instrument for which Cardiff has been closely associated. Initial results of channel selection simulations are presented here with comparisons between different combinations of channel frequency and bandwidths, along with the number of channels used and cloud particle shape. Also demonstrated is the effect of instrument noise on retrieval performance which is shown to be the dominant source of retrieval error.