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Question2: Please provide the arrangement plan of the station and yard with elevation of surrounding roads and control points.

问题2：请提供带有周边规划道路及控制点标高的站场平面布置图。

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The simulation results indicate that the pseudo-range remaining errors will be increased with the distance between base-station and GPS user and in the case of low satellite elevation.

仿真结果表明用户和基准台之间距离增大和低卫星仰角都将使伪距残差增大，气象因素和高程对伪距残差也有影响。

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So, of the 17.34 foot record elevation of the station base sea level caused by Sandy, yes, a maximum of about six inches might be related to human activity.

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