Atmospheric Refraction Delay Toward Millimeter‐Level Lunar Laser Ranging: Correcting the Temperature‐Induced Error With Real‐Time and Co‐Located Lidar Measurements
Atmospheric Refraction Delay Toward Millimeter‐Level Lunar Laser Ranging: Correcting the Temperature‐Induced Error With Real‐Time and Co‐Located Lidar Measurements
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DOI：
10.1029/2023jd039579
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发表时间：
2023-12
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影响因子：
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通讯作者：
Yun He;Dongzhe Jing;Qi Liu;Fuchao Liu;Fan Yi
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文献类型：
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作者：
Yun He;Dongzhe Jing;Qi Liu;Fuchao Liu;Fan Yi
下一代月球激光测距(LLR)的目标是毫米级的精度，极大地促进了引力物理的研究。然而，大气折射延迟会导致不可接受的测距误差，而大气延迟模型和光线跟踪计算都不能有效地修正这种误差。本文报道了一种改进的射线跟踪方法，将探空仪测量的温度分布替换为纯旋转拉曼激光雷达测量的温度分布，实现了实时的同址延迟校正。使用9夜激光雷达观测，温度引起的±15 mm的激光测距延迟可以得到校正，这是LLR误差预算中最大的残差。
Next‐generation lunar laser ranging (LLR) aims for mm‐level accuracy, significantly promoting the study of gravitational physics. However, atmospheric refraction delay causes an unacceptable ranging error that can be efficiently corrected by neither the atmospheric delay models nor ray‐tracing calculation. Here we report on an improved ray‐tracing method, in which temperature profiles measured by radiosonde are replaced by those measured by a pure rotational Raman lidar, to realize real‐time and co‐located delay correction. Using 9‐night lidar observations, temperature‐induced delays of ±15 mm can be corrected for laser ranging, which is the largest residual in the LLR error budget.