观测次数

高置信度的典型任务实测载荷谱最少观测次数

The method to determine the actual load spectrum of the representative task with the high confidence level

验证了随着观测次数的增加，卡尔曼滤波校准方法估算降水量的精度越来越高。

With the increase of observing times , the value which the Kalman Filter calibration method figures out is more accurate .

多次覆盖反射波法观测系统可以增加同一反射点的重复观测次数，从而起到压制干扰、提高有效波信号的作用。

The observation system of the reflection method with high covering number can increase repeat observation number at same reflect point , thus depressing interference and enhancing signal of effective wave .

由于不少GPS观测站有幅度达数cm的年周期变化及大部分区域站观测次数少，由1999年、2001年两期区域站GPS观测难以得到可靠的长趋势垂直构造运动速率。

Because of annual periodic variations of large amplitudes of several cm at some GPS stations and repeated GPS observations of only 2 epochs in 1999 and 2001 , the long term vertical displacement velocities at many regional stations are not reliable .