Sicard Michaël, Rodríguez-Gómez Alejandro, Comerón Adolfo, Muñoz-Porcar Constantino
CommSensLab, Department of Signal Theory and Communications, Universitat Politècnica de Catalunya (UPC), 08034 Barcelona, Spain.
Ciències i Tecnologies de l'Espai-Centre de Recerca de l'Aeronàutica i de l'Espai/Institut d'Estudis Espacials de Catalunya (CTE-CRAE/IEEC), Universitat Politècnica de Catalunya (UPC), 08034 Barcelona, Spain.
Sensors (Basel). 2020 Nov 5;20(21):6312. doi: 10.3390/s20216312.
This paper establishes the relationship between the signal of a lidar system corrected for the incomplete overlap effect and the signal of another lidar system or a ceilometer for which the overlap function is unknown. Simple mathematical relationships permit the estimation of the overlap function of the second system as well as the associated error. Several overlap functions have been retrieved with this method over a period of 1.5 years with two lidar systems of the Universitat Politècnica de Catalunya, Barcelona, Spain. The error when the overlap function reaches 1 is usually less than 7%. The temporal variability estimated over a period of 1.5 years is less than 11% in the first 1.5 km from the surface and peaks at 18% at heights between 1.7 and 2.4 km. The use of a non-appropriate overlap function in the retrieval of the backscatter coefficient yield errors up to 60% in the first 0.5 km and up to 20% above.
本文建立了针对不完全重叠效应校正后的激光雷达系统信号与重叠函数未知的另一激光雷达系统或云幂仪信号之间的关系。简单的数学关系允许估计第二个系统的重叠函数以及相关误差。西班牙巴塞罗那加泰罗尼亚理工大学的两个激光雷达系统在1.5年的时间里用这种方法获取了几个重叠函数。当重叠函数达到1时，误差通常小于7%。在距地面1.5公里的范围内，1.5年期间估计的时间变异性小于11%，在1.7至2.4公里的高度处达到峰值18%。在反散射系数反演中使用不合适的重叠函数，在最初的0.5公里内产生的误差高达60%，在更高处高达20%。
