提出了一种由OI130.4nm日气辉光谱数据反演热层O/N2的方法.建立了两者在观测天底和太阳天顶方向的数学模型,并利用辐射强度随观测角和太阳天顶角的变化特性,构建了观测角和太阳天顶角归一化系数查找表,提出了一种由OI 130.4 nm日气辉辐射反演热层O/N2的方法,并在算法中引入了偏差系数校正.最后,由计算得到的450个气辉辐射为例进行了O/N2的反演,反演误差分别为4.16%和27.05%.结果表明,提出的算法能够重现其大部分结构特征,与以往算法相比具有明显的优越性.

Thermospheric O/N2 can be retrieved from the radiance of OI 130.4 nm dayglow.In the paper,the algebraic relationship between the two variables is established,and the characteristics of the radiance varying with observing angle and solar zenith angles are discussed,based on which the look-up tables of the regularization factors are made up,thus putting up a method for retrieving thermospheric O/N2 from measurements of OI 130.4 nm dayglow and meanwhile introducing a correcting coefficient in the algorithm to dismiss the error brought about by the difference between the ideal atmosphere representative by NRLMSISE-00 and the real atmosphere.Finally,the simulated dayglow radiance data of Oct 1,2002 are used as an example to testify the validation of the algorithm.The results demonstrated that the algorithm is able to reconstruct most of the features of O/N2 and has an obvious advantage over the conventional algorithm.