传统RTK以外的生活：基于卫星的精确点定位

Many measurement professionals can find themselves in situations where there is no local reference network. What can they do? The answer is Precise Point Positioning (PPP).

Leica GeoSystems GNSS技术的基础是RTKPLUS和SMARTLINK -PPP解决方案，它补充了传统的RTK方法。使用一个自学习的GNSS传感器，例如Leica Viva GS16，您可以确定传感器适应主要条件。它将使用最相关的卫星信号，并自动为您提供最佳可用位置。

RTK技术的GNSS基础架构，使我们能够执行精确有效的定位，确实在理论的基础上面临着挑战。考虑一下：除卫星外，RTK还需要一个永久电台和服务的网络，或我们自己的参考站，移动蜂窝网络服务或使用我们自己的无线电收发器。

How many times do we need to make measurements in places where the mobile cell service is weak or unavailable? Or in the field, in spite of the increasing number of satellites, we need more of them? It has happened before and will continue to happen that due to technical issues, manpower shortages or financial reasons, a network service is not available or not available in the appropriate quality, temporarily or for a longer period of time. What happens in situations in which we need to make measurements in places where there is no local reference network at all?

这些都是可能不适用于每天平均情况的问题，但它们确实经常发生，以确保对用户的竞争优势。

PPP的不断发展的技术提供了这样的辅助解决方案问题，就Leica GeoSystems而言，它可以在SmartLink和SmartLink Fill Services中实现。

What is SmartLink?

SmartLink is a GNSS correction service where data is transmitted by satellites.

The quality of the position in this case will be like this:

Naturally, the situation above assumes that the auxiliary satellites are visible.

What is SmartLink fill?

SmartLink fill is also a GNSS correction service where data is transmitted by satellites, but it can bridge an RTK outage and retain a position to centimeter level accuracy for up to 10 minutes.

The quality of the position in this case will be like this:

显然，如果RTK校正的接收在10分钟内返回，那么我们可以预期RTK的准确性。自然，上面的情况假定可见辅助卫星。

What are the benefits of this service for the users?

• 您是否在没有参考点网络的遥远地方进行衡量，因此没有RTK网络服务？此外，没有机会基于冗长且昂贵的后处理来创建自己的网络吗？使用SmartLink，您可以在30分钟内使用±3 cm 2D精度开始进行测量。
• 您是否在由于手机中断引起的RTK校正的领域工作吗？尽管如此，您是否想继续以厘米级的准确性来继续工作，而无需停止和没有RTK校正，任何时间长的时间？SmartLink是解决方案。
• Are you working in a place where there is an RTK correction, but it is not available for some reason? Despite this, would you like to continue doing your job with centimeter-level accuracy without stopping and without RTK corrections for a temporary period of time (approx. 10 minutes)? SmartLink Fill is the solution.

To learn more about SmartLink services, pleasecontact your local Leica Geosystems representative.