LPA10激光雨滴谱仪的定标及观测对比
Calibration and Comparative Observation of LPA10 Laser-Optical Disdrometer
中文摘要：
目前在激光雨滴谱仪的气象应用中存在两个主要问题：强降水降水量测量偏差较大和无站点标定装置。LPA10激光雨滴谱仪以特有技术加强降水粒子尺度测量精度的方式，实现了在强降水过程中较小的测量偏差。此外，该激光雨滴谱仪配有可供台站使用的标定装置，便于提高观测数据的质量。通过实验室对比测试和技术参数分析，以及在实际降水中的对比观测和误差分析，结果表明，在弱降水观测中，LPA10与国际流行的雨滴谱仪降水量测量偏差都在5%左右； 在强降水的观测中，LPA10与雨量计降水量测量对比偏差较小，绝大部分绝对偏差在5%以内，取得了较好的观测和应用效果。
中文关键词：
雨滴谱仪，自适应，雨量计，累积降水量，精确度
KeyWords：
disdrometer, self-adaptive, rain gauge, accumulated rainfall, accuracy
Abstract：
There are two main problems in the application of laser-optical disdrometer at present, i.e., a large precipitation accumulation deviation for heavy rains and no calibration device applied to the equipment for meteorological observatory. The new LPA10 laser-optical disdrometer, which uses unique technologies, gets a better precision of precipitation particle size measurement and achieves a small deviation during heavy rain situations. Furthermore, the LPA10 disdrometer is equipped with a calibration device for the meteorological observatory to ensure the measurement accuracy and data validity of the device. Through comparative observation and analysis of a variety of equipment in laboratory and outdoor, the results show that in the observation of normal rain, both the LPA10 and the international popular laser-optical disdrometer got a small deviation of accumulated rainfall, which is about 5%. However, in the observation of heavy rain, the deviation of accumulated rainfall between the LPA10 laser-optical disdrometer and the traditional rain gauge is quite small, and most of the absolute deviations are within 5%, which gets a better application effect.