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首页> 外文会议>Calibration of Passive Remote Observing Optical and Microwave Instrumentation >Radiometric calibration of space-borne Fourier transform infrared-emission spectrometers: proposed scenario for European Space Agency's Michelson interferometer for passive atmospheric sounding
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Radiometric calibration of space-borne Fourier transform infrared-emission spectrometers: proposed scenario for European Space Agency's Michelson interferometer for passive atmospheric sounding

机译：星载傅里叶变换红外发射光谱仪的辐射定标：欧洲航天局的迈克尔逊干涉仪用于无源大气探测的拟议方案

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摘要

Abstract: 2FTIR instruments aimed at low temperature emission measurements require a two-point radiometric calibration because of significant emission from the instrument itself. Calibration measurements with two reference blackbodies are conducted for ground instruments. In space, the low temperature reference blackbody can be substituted with deep-space observation. Calibration operations involve complex arithmetic to obtain a calibrated spectrum from reference and actual scene measurements. Frequency and duration of calibration measurements are dependent upon instrument stability and noise budgets. When reference spectra are free of high-resolution features, calibration measurements can be performed at a resolution lower than that of actual scene measurements. The Michelson interferometer for passive atmospheric sounding (MIPAS) will limb sound the atmosphere by measuring its mid-infrared emission with an apodized resolution of 0.05 cm$+$MIN@1$/. Given the current expected temperature variations of the instrument over the orbit, MIPAS will require a deep-space reference measurement after every altitude scan, and a combined deep-space and blackbody measurement at a lower frequency. For an adequate acquisition efficiency, low resolution calibration measurements will be performed, at 0.2 cm$+$MIN@1$/ or 1 cm$+$MIN@1$/.!
机译：摘要：针对2FTIR仪器的低温发射测量，由于其本身会产生大量发射，因此需要进行两点辐射度校准。用两个参考黑体对地面仪器进行校准测量。在太空中，低温参考黑体可以用深空观测代替。校准操作涉及复杂的算术运算，以从参考和实际场景测量中获得校准的光谱。校准测量的频率和持续时间取决于仪器的稳定性和噪声预算。当参考光谱没有高分辨率特征时，可以以低于实际场景测量分辨率的分辨率执行校准测量。用于被动式大气探测的迈克尔逊干涉仪（MIPAS）将通过测量其中红外辐射以0.05 cm $ + $ MIN @ 1 $ /的变迹分辨率来倾斜大气。考虑到仪器当前在轨道上的预期温度变化，MIPAS将需要在每次高度扫描后进行深空参考测量，并需要在较低频率下进行深空和黑体的组合测量。为了获得足够的采集效率，将以0.2 cm $ + $ MIN @ 1 $ /或1 cm $ + $ MIN @ 1 $ /进行低分辨率校准测量！

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