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29.8540m;-0.4mm 29.8540m;+0.4mm 29.8536m;-0.4mm 29.8536m;+0.4mm
±2.4m,±1.0mm,1/360000 ±1.0mm,±2.4mm,1/150000 ±1.1mm,±2.6m,1/140000 ±2.6mm,±1.1mm,1/330000
±10.8mm,1/12200 ±9.4mm,1/14100 ±4.7mm,1/28200 ±5.4mm,1/24500
1/7500 1/1000 1/300 1/16000
0.009m 0.012m –0.009m –0.012m
±10.8mm,1/12200 ±9.4mm,1/14100 ±4.7mm,1/28200 ±5.4mm,1/24500
0.00022 4/18448 22³10.4 1/4612
0.0240 0.0424 -0.121 0.0121
±10.8mm,1/12200 8.士9.4mm,1/14100 ±4.7mm,1/28200 ±5.4mm,1/24500
衡量距离精度指标是用相对误差 d1和d2具有同等精度 d2相对误差大 无限次增加距离丈量次数,会带来好处