The paper discuss the2items side-lengthcorrection of the diggings in Jing-City by3degree strap plane coordinate system, and discuss effect on diggings surveying and adaptive countermeasure.
On the basis of this method, and taking advantages of the methods-time-domain translation as well as the window length change, the uniform formula for the phase difference correction is derived.
在此基础上，将窗中心平移法与时域平移和改变窗长法综合应用，推导出相位差校正的统一公式。
3
The article mainly studies the field data collection, length calculation method, sag correction and temperature mend, and analyzes and discusses the measuring precision.