结果表明采用曲线拟合法能使测距绝对误差在3个采样点以内，与传统的反射波起始点确定方法相比有较大优势。
The absolute error is no more than 3 sampling points, so it has more advantages compared with the traditional methods to judge the start point of reflect wave.
本文讨论了两个问题：1控制网的精度评定中，顾及起始数据误差影响的必要性。
This paper deals with the following problems, 1 the necessity of taking the influence of initial datum error into account when estimating the accuracy of a control network.
解决了顾及起始数据误差的工测多级控制网的精度梯度。
The problem of measuring accuracy gradient of multi-class engineering control network, which accounts for the initial data errors, has been solved.
本文讨论了起始数据误差和观测值误差的比例因子问题。
This paper deals with the scale-factor between the errors of initial data and observations.
结合附合导线平差过程，文中用真误差分析方法推导了起始方位角误差对附合导线平差结果的影响公式；通过分析与数据计算，得到了起始方位角误差对平差后导线点坐标和导线边方位角的影响规律；
By its adjustment procedure, the effect formula of initial-bearing's error on adjustments of a straight and equal-side connecting traverse are introduced with the method of true error analysis.
结合附合导线平差过程，文中用真误差分析方法推导了起始方位角误差对附合导线平差结果的影响公式；通过分析与数据计算，得到了起始方位角误差对平差后导线点坐标和导线边方位角的影响规律；
By its adjustment procedure, the effect formula of initial-bearing's error on adjustments of a straight and equal-side connecting traverse are introduced with the method of true error analysis.
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