基于地心坐标系的卫星导航测风平滑算法  

Smoothing Algorithm of Upper Wind Based on Geocentric Coordinate System for Satellite Navigation Radiosonde System

作　　者：李宛桐 姜明 史静 杨荣康[2] 黄威 LI Wantong;JIANG Ming;SHI Jing;YANG Rongkang;HUANG Wei(Tianjin Meteorological Observation Center,Tianjin 300061;Meteorological Observation Center of China Meteorological Administration,Beijing 100081;Luoyang Electric Equipment Test Center of China,Henan,Jiyuan 459000)

机构地区：[1]天津市气象探测中心,天津300061 [2]中国气象局气象探测中心,北京100081 [3]中国洛阳电子装备试验中心,济源459000

出　　处：《气象科技》2022年第2期171-178,共8页Meteorological Science and Technology

摘　　要：本文从高空风探测原理出发,提出可业务化运行的卫星导航探空系统高空风平滑计算方法。该算法首先根据北斗-GPS(Global Positioning System)双模式探空仪提供的大地坐标秒间隔数据,基于地心坐标系计算原始高空风;然后,采用矢量滑动平均法对原始数据进行平滑处理。通过与同球施放的芬兰RS92探空系统做比对分析得出,滑动平均窗口在0~32 km高度范围内设置为34 s、在32 km高度以上设置为60 s条件下,卫星导航探空系统与RS92探空系统高空风测量结果吻合较好。该算法计算结果同基于站心坐标系计算的30 s滑动平均风基本相同,但其风速分量误差范围在32 km高度以下略优、在32 km高度以上减小明显,升空全程误差范围更为稳定。Based on the basic principle of upper wind sounding, a smoothing algorithm of upper wind used in routine operation for satellite navigation radiosonde system is presented. Firstly, the original upper wind is calculated in a geocentric coordinate system based on the second geodetic coordinate data provided by the Beidou-GPS dual-mode radiosonde. Then, the vector average method is adopted to smooth the original upper wind. Through comparative analysis with the RS92 radiosonde system launched on the same ball, the upper wind of the satellite navigation radiosonde system coincides with the RS92 radiosonde system under the condition that the moving average window is set to 34 s in the range of 0 to 32 km and 60 s above 32 km. The calculation result of this algorithm is basically the same as the 30 s moving average wind calculated in the local Cartesian coordinates coordinate system. However, its wind components’ confidence interval is slightly better below 32 km and obviously reduced above 32 km, and the error of the whole flight is more stable.

关 键 词：高空风 地心坐标系 矢量滑动平均 卫星导航 

分 类 号：P41[天文地球—大气科学及气象学]