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MGBAS: RTK Service Validation and Service Integration Approach for a PNT Unit

机译：MGBAS：PNT单位的RTK服务验证和服务集成方法

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The development of GNSS augmentation systems plays an important role for the use of satellite navigation in safety critical maritime applications, since they demand high accuracy and integrity (e.g. critical vessel operation areas like ports, restricted waterways or to support docking manoeuvres). A common augmentation technique used in the maritime sector is the IALA Beacon DGNSS (Differential Global Satellite Navigation System). Typically, this technique provides a horizontal accuracy of about 0.5m to 1m at the reference station and degrades typically about 0.4m to 1m for every 100nm of distance from the broadcast site [8]. But even if this technique helps to increase the accuracy and integrity of GNSS positioning, the performance is not sufficient to meet the IMO requirements for critical traffic areas like ports and automatic docking manoeuvres [10][11]. To achieve the required centimetre accuracy for such manoeuvres, an experimental “Maritime Ground Based Augmentation System (MGBAS)” has been implemented and developed since 2006 in the port of Rostock (Germany). The MGBAS comprises a reference station (RS) and an integrity monitoring station (IMS) operating as virtual user. Based on this concept GPS based Real- Time Kinematic (RTK) services with preliminary integrity monitoring are currently provided [16]. In order to satisfy simultaneously the system and user integrity the development of a MGBAS user segment as part of a PNT unit is envisaged for near future. On the one hand this paper presents the ongoing performance assessment of the MGBAS RTK services with respect to the IMO’s requirements. On the other hand it discusses the development of the MGBAS user segment as part of a PNT unit. Therefore, the beginning of the paper briefly introduces the existing MGBAS architecture ashore and motivates the necessity of an entire consideration of ashore services and on-board elements. In the second part the current RTK services are analysed over 15 days regarding their performance. Afterwards integrity monitoring modules at the IMS, whose application in the MGBAS user segment is intended, are briefly described regarding their functionalities and existing challenges. Finally, the paper concludes with an outline of the next steps in the development of the experimental MGBAS consisting of ashore and on-board components.
机译：GNSS增强系统的开发在安全临界海洋应用中使用卫星导航起着重要作用，因为它们需要高精度和完整性（例如，港口，限制水道等关键船舶操作区域，或支持对接演习等）。海洋部门中使用的共同增强技术是IALA信标DGNSS（差分全球卫星导航系统）。通常，该技术在参考站提供约0.5米至1M的水平精度，并且通常从广播站点的距离每100nm距离降低约0.4m至1m。但即使这种技术有助于提高GNSS定位的准确性和完整性，性能也不足以满足Ports和自动对接机动等关键交通区域的IMO要求[10] [11]。为了实现所需的厘米准确性，这种动作的准确性，自2006年以来，在罗斯托克（德国）港以来，实施了实验“基于海上的增强系统（MGBA）”。 MGBA包括参考站（RS）和作为虚拟用户的完整性监视站（IMS）。基于此概念基于GPS的实时运动（RTK）服务目前提供了具有初步完整性监测的服务[16]。为了同时满足系统和用户完整性，在不久的将来设想作为PNT单元的一部分的MGBA用户段的开发。一方面，本文提出了对IMO的要求的持续执行MGBARTK服务的绩效评估。另一方面，它讨论了MGBA用户段的开发作为PNT单元的一部分。因此，论文的开始简要介绍了现有的MGBAS建筑岸上，并激励了整个考虑到岸上服务和板载元件的必要性。在第二部分中，目前的RTK服务在15天内分析了其性能。在IMS处的IMS中的完整性监视模块，其应用于MGBA用户段的应用程序，用于其功能和现有挑战。最后，本文结束了下次介绍了由岸上和板载组成的实验MGBA开发的下一步。

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