Stationerror in precipitation observation consists both random error and systematic error.
降水量观测误差包括随机误差和系统误差。
2
An estimation method of stationerror in precipitation observation is given and its effect on the water resources appraisal is pointed out.
本文给出降水量观测误差的估算方法，并指出其对水资源评价结果的影响。
3
Differential GPS can eliminate the common error to improve the positioning precision by a spatial correlation between the base station and the mobile station.