[MTT38-P02] Calibration technique for water vapor Raman lidar using GNSS PWV and meso-scale model
Keywords:water vapor, lidar, GNSS, MSM
In this study, we propose a new calibration technique for water vapor Raman lidar using global navigation satellite system (GNSS)-derived precipitable water vapor (PWV) and the Japan Meteorological Agency Meso-Scale Model (MSM). The analysis was accomplished by directly fitting the GNSS-PWV to integrated water vapor profiles combined with the MSM and the results of the Raman lidar observation. This method can be applied to lidar signals under a limited height range due to weather conditions and lidar specifications. For example, Raman lidar using a laser operating in the ultraviolet C (UV-C) region has the advantage of having no daytime solar background radiation in the system. However, the observation range is limited at altitudes lower than 1–3 km because of the strong ozone absorption in the UV-C region. The new calibration method will allow the utilization of various types of Raman lidar systems. In this paper, we will introduce our proposed calibration techniques as well as the preliminary results on the accuracy of the estimated calibration factor based on numerical simulations.