摘要
本文讨论了利用差分吸收法来遥感大气中的水汽。水汽透过率用辐射计测量，水汽含量由我们自行编制的红外辐射大气透过率计算程序计算。在此同时还观测了气象参数，以确定光路上的水汽含量。结果表明，水汽长度的计算值和测量值非常吻合，回归曲线的相关系数达０．９７，均方根偏差为０．０１５ｇ／ｃｍ２。文中最后讨论误差来源和改善精度的途径，并指出对其它气体分子的吸收和气溶胶的消光进行修正的必要性。
Based on differential absorption method, remote sensing of atmospheric watervapour is discussed in the paper.The water-vapour transmissivity is measured by aspectral radiometer and the water vapour content is obtained by our calculationprogram of infrared-radiation atmospheric transmissivity. The meteorological parametersare observed simultaneously to determine the water vapour content in the path. The result shows that the calculated water vapour content agrees well with the measuredvalue.The correlation coefficient of regression equation is 0.97 and the RMS error is0.015g/cm2.Lastly,the error sources and the way to improve remote sensing accuracyare discussed and the necessity correcting the absorption of other molecule and theextinction of aerosol is indicated.
出处
《环境遥感》
CSCD
1996年第2期130-137,共8页
关键词
大气
水汽
红外辐射
遥感
atmospheric water
infrared radiation
remote sensing
