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激光雷达是探测大气强有力的工具,其误差估算是数据处理的一个重要内容。在气溶胶后向散射系数的反演公式中,气溶胶后向散射系数对各直接测量量的偏导数是很难求的,传统的误差传递公式难以发挥作用。针对这一困难,提出了一种直接的误差传递方法,通过比对计算检验了它的合理性和可靠性。并用该方法估算大气分子消光系数、参考点气溶胶后向散射系数、气溶胶激光雷达比和测量信号分别独立变化时引起激光雷达反演气溶胶后向散射系数误差的大小及总误差的大小。
Lidar is a powerful tool for detecting the atmosphere, and its error estimation is an important part of data processing. In the inversion formula of aerosol backscattering coefficient, the partial derivative of the aerosol backscattering coefficient for each direct measurement is hard to find, and the traditional error transfer formula is hard to work. In response to this difficulty, a direct error transfer method is proposed, which verifies its rationality and reliability through comparison and calculation. Using this method to estimate atmospheric molecular extinction coefficient, backscatter coefficient of reference point aerosol, aerosol laser radar ratio and measurement signal, the errors of backscatter error and the total error of aerosol backscattering are analyzed.