Measuring GNSS accuracy using SAPOS RTK network

作者：Renata Barradas Gutiérrez

Every year,the Council of European Geodetic Surveyors (CLGE)organises学生竞赛aimed at rewarding young people for their work in various surveying-related areas. This year, theCLGE学生竞赛于2017年9月27日在柏林的Intergeo授予。

The three categories awarded this year were:

• 地形和地形，

• GIS，地图和会计师以及

• Galileo, EGNOS, Copernicus.

Leica Geosystemshad the pleasure to support the Geodesy and Topography Award.今年类别的授予论文是：“一个investigation into the empirical accuracy of GNSS-NHN heights using SAPOS after the introduction of the GCG2016 as a component of the integrated geodetic spatial reference 2016”《 Vitaly Winter》，德国波恩大学农业学院的大地测量和地理知识学生。该论文是一项本地和实用的研究，它显示了地aster和工程测量的大地GNSS接收器的机会和准确性。

Theresearch displays for the first time the achievable accuracy ofSAPOS HEPS（Network-rtk）在引入新的地理空间参考2016年之后在使用Leica Geosystems GNSS设备的科学研究中。

调查的目标和目标是：

• To obtain an empirical accuracy value for GNSS-NHN-heights in a specific region

• 比较目标和测量值

• Derive the accuracy of theQuasigeoid model GCG2016使用Leica Geosystems GNSS接收器

• Determine factors on which the accuracy of height measurement depends on.

ALeica GS16 Self-Learning GNSS Smart Antenna和Leica CS20 Field Controller通过与提供商SAPOS的网络RTK服务HEP连接来获得正常高度。138次测量了德国北莱茵 - 韦斯特法里亚的莱茵 - 塞格县的官方高度标记。收集的使用的数据类型包括有关正常高度，椭圆形高度，起伏值，DOP值和测量位置（持续时间）的有用信息。

Leica Geosystems GNSS设备在实现调查的结论结果方面发挥了至关重要的作用。“ [Leica GS16和CS20场控制器]的硬件是可靠且方便的。最重要的是，可以对软件设置进行深入定制，以提高可靠性和工作流程。所选的设备必须接收各种卫星系统，例如GPS，Glonass，Galileo和Beidou，并进行快速稳定的通信，”said Winter.

The results of the investigation test the precise positioning of the Network RTK method used by the satellite positioning service (SAPOS). The observations concluded a high accuracy and precision of under one centimetre using Leica Geosystems GNSS solutions.“GNSS-technologies are continuously improving so the results of my investigation can be used for comparisons to future investigations or to similar investigations in other regions,”concluded Winter.

右：单个控制点的观测值偏差，显示了使用的设备和服务在有利条件下的准确性。剩下：Deviations of the height-markers in the study area in a target-actual comparison.

Leica GS16和CS20场控制器连接到高度标记。

For more information about this study, visit:http://www.clge.eu/news/index/150