The precisionofsurvey system is much higher than navigation system's.
惯性测量精度通常要求比惯性导航精度高几个数量级。
2
An error analysis of the system must be made to ensure that the system conforms to the required precisionofsurvey in construction.
为了确保导向系统测量精度达到施工测量的精度要求，必须对自动导向系统的测量误差进行分析。
3
This article give a kind of location method, which determines direction by radar, then filters error by mathematical method in order to raise the precisionofsurvey result.