如何检查您的测量师是否用Leica GS18 T垂直握住杆子

As a survey manager, you may recognise the problem - you ask your teams to ensure the pole is vertical when measuring and staking. When they return from the field, however, there is no way to know if the pole was really held vertically. Until now. When usingLeica Captivatewith aLeica GS18 T GNSS传感器，现在可以检查调查团队是否垂直握住杆子。

The new “Store tilt only” functionality

Until now we have always explained how the GS18 T is the fastest GNSS RTK rover since the pole no longer needs to be held vertically thanks to tilt-compensated measurements. This is still true and probably the main way of working with the GS18 T. On some projects, though, tilt-compensated measurements are not allowed due to legal requirements. Even on these projects, when the pole must be held vertically, the GS18 T is still the right tool - it can be used to prove the pole was held vertically.

Within Captivate v3.50, a new setting was introduced called “Store tilt only”. When this setting is activated, tilt-compensation is not applied to measurements – the pole must be held vertically. However, when a point is stored, the tilt values are stored together with the point coordinates.

下面的视频显示了如何激活设置并通过倾斜杆，仍然计算倾斜值。然后，我们用垂直固定的杆子测量一些点。然后将包括倾斜值在内的测量点导入到Leica Infinitywhere the tilt values can be seen. The measurements can be analysed – including sorting the points by their tilt values.

How much error can be introduced by not holding the pole vertical?

When measuring points with a GNSS RTK sensor in a conventional manner, the sensor must be held vertically such that the tip of the pole is vertically under the centre of the antenna (the Antenna Reference Point - ARP) - see Figure 1. By not holding the pole vertically, an error will be introduced to the measured point coordinates. The bigger the tilt, the bigger the error.

当以常规方式测量点时，测量师总是试图通过观察附着在杆上的气泡来尽可能垂直固定杆。连接到两极的大多数水平的气泡都有20英尺的气泡。这意味着，即使小心翼翼地观看气泡，杆子也很容易被20'倾斜。由20’倾斜的2米极向计算的接地坐标引入了1厘米的误差。

此外，由于将极垂直的垂直固定并同时测量一个点并不容易，因此许多用户将测量超过1个时代（例如5个时代）。在这段时间里，杆上的任何运动都将平均。

What tilt value is stored with the point?

如果用一个时期测量一个点，则以该点存储的倾斜值是该时期的倾斜值。如果测量一个以上的时代的点，则在测量点时，将最大的倾斜度值与点一起存储。

确保定期校准杆上的气泡

当然，即使测量师看着气泡并小心地握住杆子，使气泡的中心居中，如果气泡本身未经校准，这也无用。这是一项简单的任务，我们建议杆气泡每月进行一次校准，或者如果杆掉落，请尽快。

In addition, the GS18 T can of course be used to check the calibration of the bubble. Place the pole in a bipod, hold the pole vertically by watching the bubble and observe the tilt values in the Current GS Position panel.

Ask for a demo, if you want to try the new “Store tilt only” functionality

该博客应该为您提供莱卡Captivate和GS18T功能的“仅商店倾斜”功能的粗略概述。如果您想要更多信息，请与您当地的Leica Geosystems代表联系 - 他们将很乐意提供帮助。