PLANNING OF THE SECOND GROUP METEOROLOGICAL NETWORKS OVER JIANG-HUAI PLAIN

Based on the data of daily air temperature and relative humidity from 1961 to 1980 over the Jiang-Huai Plain,the structure functions of the two elements have been calculated,and thereby the relationships between error of linear interpolation and spacing of stations have been established.According to the principle that the standard error of interpolation should not exceed the standard error of observation,the maximum admissible spacings between stations of the second group meteorological networks have been estimated over this area.Finally,it has been found that replacing the interpolation along a segment by the interpolation in a plane will increase the accuracy of interpolation.