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现行衡量台站水准精度的唯一指标,是测站往返高差中数中误差M_站=0.11mm。并以此指标计算各站、测段及环的观测允许限差。例如测段往返高差不符值:W_h=±0.44N~(1/2),环闭合差为±0.22N~(1/2)。多年来,从我省各台站实测成果统计,我们发现这一精度指标偏低,实测成果精度大多高于此指标。同时我们认为现行台站规范中计算测站往返测高差中数中误差的公式尚不能真实反映测站高差精度,有商榷讨论之必要。
The only measure to measure the station level accuracy is the error M_ station = 0.11mm. And use this index to calculate each station, measuring section and the ring of observation allowable limit. For example, the height difference between two sections of measurement range is different: W_h = ± 0.44N ~ (1/2), and the loop closure difference is ± 0.22N ~ (1/2). Over the years, statistics from all stations in our province measured results, we found that the accuracy index is low, the measured results are mostly higher than the accuracy of this indicator. At the same time, we think that the formula for calculating the error between the number of round trip and height difference between stations in the current station norms can not truly reflect the accuracy of station height difference, and it is necessary to discuss it in a discussion.