摘要
从理论上证明了三部多普勒天气雷达联合测量大气风场的误差分布是一组同心圆，同心圆的圆心位置与三部雷达的相对位置和各部雷达的测速精度有关。各种误差分布半径与各部雷达的测速精度和误差的大小有关。如果三部雷达的测速精度相同，联合探测的最佳布局是等边三角形、其边长ｌ与各部雷达的测速精度、要求的探测误差和雷达的最大探测距离（Ｌ）有关。当三部多普勒天气雷达的测速精度都是１ｍ／ｓ时，如果要求的探测误差小于或等于２ｍ／ｓ，这时边长与雷达的最大探测距离之间的关系为：ｌ＝０．５５Ｌ。
t is proved from the equations of errors that the isolines of errors in wind measurement by a triple Doppler radar system are concentric circles and the more radius is, the more error is. The position of circular centre and size of radius with given error are related to relative positions among three radars and measuring velocity precisions of each radar. If the measuring velocity precisions are the same for three doppler radars, the optimum arrangement of the three radars is a equilateral triangle. The length (l) of one side of equilateral triangle is related to measuring velocity precisions and error requirement and maximal distance (L) of radar detection. if precision=1 m/s and error ≤2 m/s, then l=055L.
出处
《气象学报》
CSCD
北大核心
1998年第1期96-103,共8页
Acta Meteorologica Sinica
关键词
多普勒雷达
最佳布局
误差分布
大气
风场
Triple doppler radar,Optimum arrangement, Error distribution.
