From the sky to the ground

Since the late 1990s, the heavy construction industry has increasingly benefitted from GPS technology to achieve highly accurate grade information to complete earth-moving jobs quickly and precisely.

Without a correction of the satellite signals from a reference station with a known position, a machine control solution’s GPS system would have an accuracy only higher than a couple of metres similar to an in-car navigation system. This is not accurate enough for the construction industry that needs positioning precision down to a couple of centimetres.

The machine control solutions therefore need to receive corrected signals using a technique called Real Time Kinematics (RTK) from either a single RTK base station or an RTK network, which is a network of permanent GPS and/or GNSS receivers whose combined data is used to correct transmissions errors from the satellites.

HxGN SmartNet is a worldwide RTK network service based on Leica Geosystems’ GNSS technology. With easy access to precise correction data, users experience the best availability, reliability and traceability using internationally recognised standards, together with flexible and affordable subscription options. Many professionals benefit from HxGN SmartNet to efficiently complete their daily tasks, such as:

• machine control
• 测量
• 工程
• construction
• 农业
• 公用事业调查
• 考古学
• 监视
• 还有很多。

丹麦的SmartNet

HXGN SmartNet总共拥有57个参考站，并由丹麦Geodata代理机构控制和批准，拥有最广泛的RTK网络，并确保全国最佳覆盖范围。Leica GeoSystems机器控制部提供的3D机器控制解决方案每秒使用参考站或参考站网络的校正信号。

订阅HXGN SmartNet的客户会为地球移动机的GNSS接收器接收SIM卡，该卡通过电话网络自动连接到最近的参考站。这使机器操作员可以从卫星接收到他的卡宾内面板的精确坐标。

"I depend 100 per cent on SmartNet in my daily work. I receive the project drawings and use the Rover CG60 from Leica Geosystems to mark out roads, wells, cables and so forth. I see instantly if there is something wrong, either with the satellite coverage or with the SmartNet signal, which, by the way, happens very rarely," said Jakob Lind, surveyor at Søren Kristiansen A/S.

您可以信任的精确定位网络

集成到机器控制解决方案中的自动定位服务仅需要移动数据连接和可接受的Internet连接。这款24/7 GNSS网络RTK和校正服务建立在世界上最大的参考网络上，并未被用户忽略，而它迅速确定了精确的位置。

Fuglsanggard A/S的Thomas Petersen说：“我并没有真正注意到校正服务，因为它通常会自动工作，非常好。如果我暂时松动互联网连接，我会在机器内部的面板上收到警告。”

该服务不断提供高度可用的基础架构，甚至为所有客户提供免费短信服务，如果HXGN SmartNet存在问题，并提供了有关大气错误的信息。为了提供高精度和高可用性，由太阳风暴影响的信号在几分钟之内恢复，用户可以遵循有关太阳耀斑和网站电离层错误的信息。

“卫星的信号可能会受到树木或高建筑物的影响，即使是一天中的时间也可能影响卫星的覆盖范围。3D机器控制解决方案如果与小于少于卫星的连接，则会在面板上发出警告需要四颗卫星，或者如果RTK信号太慢。“在大量数据流量的地方，例如在大型教育机构的附近，校正信号可以延迟。如果由于信号缓慢而导致的不准确性高于5厘米，则系统将自动关闭。”

有几年的经验作为一个机器自由进出rator Rune Lodall, sales consultant for Leica Geosystems Denmark recalled, "10 years ago the majority of construction companies used base stations on their job site, but today HxGN SmartNet offers such precise data that it is used for most projects, even for grading jobs that require maximum accuracy."