高空气象探测测风计算方法  

Computational method of anemography of upper air meteorology survey

作　　者：王烨芳[1] 齐久成[1] 王威[1] 

机构地区：[1]中国白城兵器试验中心,白城137001

出　　处：《气象水文海洋仪器》2008年第3期26-28,共3页Meteorological,Hydrological and Marine Instruments

摘　　要：针对高空气象探测雷达测风传统计算方法存在数据使用率低、算法误差大、测量精度不高、风速为零时风向不定和风向过"北"难以处理的缺点,提出了将风矢量在规定时段内进行矢量平均求取风向、风速值的新算法;针对高空气象探测传统雷达采样低,在求取规定高度层的风向风速值时需要用到内插的实际情况,提出了用曲线拟合内插替代原有的线性内插法的新观点。计算表明,通过算法的改进提高了数据利用率,解决了风速为零风向不定、风向过"北"的技术难点,内插误差也得以减小,数据精度优于传统方法计算的精度,能更好地反映高空气象的真实情况,对于气象台站实施高空气象探测业务有较强的指导性,具有很高的实用价值。In order to deal with the problems in traditional algorithm of upper air meteorological reconnaissance radar anemometry, such as low ratio of data usage, serious algorithm error problem, low accuracy of measuring, indefiniteness of wind direction when wind speed is zero, and the difficulties when the wind direction passes ＂north＂, this article puts forward a new way of calculating, that is to obtain wind direction and speed by averaging the wind vectors in stipulated time period. Besides, in order to solve the sample shortage problem and aiming the situation that interpolation is needed when obtaining the wind direction and speed in stipulated level of altitude, this article gives a new idea, that is, to replace the linear interpolation method with the curve fitting interpolation method. According to the algorithm facts, thanks to this algorithm improvement, data usage ratio is higher. The difficulties while the wind speed is zero or the wind direction passes ＂north＂ are met. The number of interpolation errors can be decreased. Data precision is higher than the traditional one, by which the real phenomenon of upper air can be better described. So it is very helpful and useful for meteorological stations to perform upper air meteorological reconnaissance.

关 键 词：雷达测风 算法 矢量平均 曲线拟合 

分 类 号：TH765.9[机械工程—仪器科学与技术]