它是如何工作的？是什么使它与众不同？

GS18 t可以比以往任何时候都更快，更方便地测量和放置点。使用GS18 T，无需在进行测量或出发时垂直平整杆。您可以从字面上忘记泡沫（#ForgetTheBubble）。遵循Leica Geosystems GNSS业务总监Bernhard Richter的问答关于新产品，以下对Leica Geosystems应用程序工程师Paul Dainty的采访为我们提供了有关如何使用新Leica GS18 T及其工作原理的更深入的见解。

是什么使GS18 T不同？它是如何工作的？

TheLeica GS18 t与市场上的任何其他产品不同，因为它不依赖磁力计来校正每个测量的杆倾斜。磁力计受到金属物体的影响，例如车辆，铁栅栏和横梁，甚至是钢筋混凝土，所有这些都经常在建筑位置上发现。为了提供准确和可靠的倾斜值，Leica GeoSystems开发了一种特定应用，功能强大且轻巧的惯性微单元（IMU），该微单元（IMU）内置在GNSS天线中。真实的时间倾斜补偿将GNSS数据与IMU的倾斜度和方向值结合在一起。与基于磁力计的GNSS天线不同，GS18 T的倾斜补偿不需要校准，并且不受金属对象干扰的影响。

在困难条件下的测量表现，例如城市峡谷或带有重冠层的木材呢？

像Leica Viva GS16，Leica GS18 T是具有高级性能的自学习的GNSS智能天线。使用RTKPLU的这种自适应测量引擎通过自动选择最佳信号组合，在建筑工地上提供了最佳位置的测量工程师。此外，GS18T为未来做好了充分的准备。凭借其555个频道，它能够跟踪来自全球所有主要GNSS系统的所有信号，例如Glonass，Galileo，Beidou或QZSS（更多详细信息，请参见更多详细信息GS18 T数据表）。

通过倾斜补偿进行测量的准确性如何？

The accuracy depends on many factors. There is the accuracy of the GNSS position. If we look at the specified RTK solution, it is the same as with the GS16 – typically 8 mm + 1 ppm (single baseline length) Hz and 15 mm + 1 ppm (single baseline length) V. The accuracy of the tilt measurement is divided between the tilt accuracy and the direction of tilt accuracy. The tilt accuracy will typically be better than 0°12'00" and the direction of tilt accuracy typically better than 1°00'00". This means over a 1.8 metre pole length, the overall tilt accuracy is typically better than 20 mm at the pole tip with a tilt angle of 30°. This accuracy is comparable and most of the time better than using a conventional GNSS pole with a 20’ level bubble to make the pole vertical.

If the pole is tilted more than 30°, the accuracy of the tilted measurement reduces for two reasons:

1. Tilt accuracy declines as the tilt is increased and the direction of tilt accuracy has higher impact
2. 随着倾斜角的增加，天线开始失去某些卫星的轨道，因此降低了GNSS位置质量。

In any case, the position quality indicator inLeica Captivateshows the combined GNSS position quality and tilt quality, therefore representing the true pole tip accuracy.

极点尖端的精度为0.0175米，在现场屏幕上以Leica Captivate v3.0显示。

Does staking out also work with a tilted pole?

Yes, the tilt compensation can be used in any Captivate app where you can measure, meaning staking out is also much quicker and much more convenient than ever before. When setting out with conventional GNSS equipment, several different steps have to be done at the same time:

• Watching and interpreting the instructions on the screen
• 定向，根据说明移动杆子
• Holding the pole vertical.

Holding the pole vertical, though, is no longer needed. With the GS18 T and the new迷人v3.0, setting out is hugely simplified and a completely new experience. Utilising the tilted pole information and sensor heading, the intuitive 3D stake instructions now make it much easier to navigate to a stake point.

大幅简化出来：使用功能强大，直观的3D查看器，导航到这一点更容易。

Leica Geosystems的含义是什么，“难以到达之前无法衡量的点”？

使用常规的GNSS RTK漫游器，诸如障碍物之下的拐角，墙壁，围栏，轻柱或诸如汽车之类的点之类的点之类的点不能直接用垂直杆直接测量。例如，要测量建筑物的角落，您必须测量附近的一个点，并使用替代方法（例如Total Station）对该点进行偏移或对其进行测量 - 这两个选项都需要时间来降低生产力。使用GS18 T，可以直接测量建筑物角，因为可以将杆倾斜并轻松快速地放置到角落。对于所有其他难以到达对象的东西也是如此，这意味着GS18 t使测量比以往任何时候都更容易，更快。

For a better understanding, I would recommend to watch the GS18 T how-to-video:

是否会影响建筑物旁边的准确性会受到影响？

That is a very good question and one that people have been asking. When measuring next to buildings, the amount of multipath is likely to increase and a part of the view to the sky will be obstructed by the buildings, reducing the number of visible satellites. This makes for challenging GNSS conditions. The GS18 T with RTKplus technology is self-learning, meaning the sensor will automatically use the best signals and widely mitigate the multipath signals to compute its position. As long as the sensor can track enough satellites, an RTK position will be computed and the GNSS position quality will be displayed. So, whilst the accuracy is not likely to be quite as good as when measuring with an open view of the sky, the displayed GNSS position quality can be trusted so that you always know what accuracy your measured point will have.

在哪里可以尝试新的Leica GS18 T？

轻松，只需联系您local Leica Geosystems distributorand ask for a hands-on demo.

保罗·迪蒂（Paul Dainty）
Leica Geosystems的应用程序工程师