The connection can be made by using the running surface of the paved cart as the horizontal datum.

连接时可以利用已铺好的大车运行轨道面作为水平基准。

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Actually, floating datum is still horizontal datum, but the datum elevation of different CMP is variable.

实际上浮动基准面还是水平基准面，只是不同CMP的水平基准面高程可以变化。

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The results were as follows. The horizontal datum and two-pass statics method gave minimum depth error on time section.

试验结果表明，采用水平基准面两步法静校正，时间剖面反演深度误差最小；

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