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Method and results for optimizing the MOPITT methane bandpass

机译:优化MOPITT甲烷带通的方法和结果

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The Measurements of Pollution in the Troposphere (MOPITT) instrument will measure carbon monoxide and total column methane in the Earth's atmosphere by means of gas-filter correlation radiometry. The center, width, and shape of the bandpass filters used to isolate the spectral channels must maximize the signal level and sensitivity to the gas of interest and minimize the interference from other absorbing gases (notably water vapor). I calculated the sensitivity to methane and the interference from other gases as a function of filter center and width. A slight shift in the filter parameters from the MOPITT baseline values increases the methane sensitivity by 20% and decreases the water vapor interference to 6% of its baseline value.
机译:“对流层污染测量”(MOPITT)仪器将通过气体过滤器相关辐射法测量地球大气中的一氧化碳和总甲烷。用于隔离光谱通道的带通滤波器的中心,宽度和形状必须使信号电平和对感兴趣气体的灵敏度最大化,并使来自其他吸收气体(尤其是水蒸气)的干扰最小化。我计算了对甲烷的敏感度以及其他气体的干扰,作为过滤器中心和宽度的函数。过滤器参数相对于MOPITT基准值的微小变化会使甲烷敏感性提高20%,并将水蒸气干扰降低至其基准值的6%。

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