Real-time GPS/Galileo precise point positioning

实时GPS/Galileo精确单点定位

• 批准号: 485079-2015
• 负责人: ElRabbany, Ahmed
• 金额: $ 1.82万
• 依托单位: Ryerson University
• 依托单位国家: 加拿大
• 项目类别: Engage Grants Program
• 财政年份: 2015
• 资助国家: 加拿大
• 起止时间: 2015-01-01 至 2016-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=584709
• 关键词: Real; time; GPS; Galileo; precise

Precise point positioning (PPP) is an evolving technique, which employs a single global navigation satellite system (GNSS) receiver. PPP proved to be capable of providing positioning solution at the sub-decimeter and decimeter-level accuracy in static and kinematic modes, respectively. Unfortunately, however, at present the PPP solution takes approximately 20 minutes to converge to a decimeter-level accuracy. This in turn slows down the adoption of the technique by many users. Tulloch Engineering, an Ontario-based geomatics consultancy firm, is currently engaged in many positioning activities. The company relies essentially on the real-time positioning service through the virtual reference station (VRS) technique. Unfortunately, however, the coverage of Ontario's VRS systems is limited to a small region of the province. When VRS system is unavailable, Tulloch uses the PPP technique, despite its slow solution convergence at present. To increase the company's productivity, Tulloch Engineering is interested in adopting a technique that reduces the PPP convergence time without affecting the positioning accuracy. The major objective of the proposed research is to develop algorithms and estimation methodologies for real-time GPS/Galileo PPP. This in turn requires that the ambiguity parameters be fixed to their correct integer values on the fly. A major problem to realize this, however, is the presence of the receiver and the satellite un-calibrated hardware delays. To overcome this problem, improved precise satellite products and calibrated hardware delays should be produced and applied to the PPP model. As most of Canada's high latitude regions have no GNSS VRS networks, real-time GPS/Galileo PPP can be the solution for precise positioning application. As such, the outcome of project will increase the productivity, efficiency and operation cost for Tulloch Engineering (and other Canadian companies). Other industries, such as mining and offshore, will also benefit from the developed technique. The project will also contribute to the scientific excellence of Canada as a technological hub for innovative techniques.

精确点定位（PPP）是一种不断发展的技术，它采用单个全球导航卫星系统（GNSS）接收器。事实证明，PPP能够分别在静态和运动学模式下的亚点和分分级级别的准确性下提供定位溶液。但是，不幸的是，目前，PPP解决方案大约需要20分钟才能收敛到分解表级的精度。反过来，这减慢了许多用户对技术的采用。 总部位于安大略省的地理咨询公司Tulloch Engineering目前从事许多定位活动。该公司基本上依靠虚拟参考站（VRS）技术的实时定位服务。但是，不幸的是，安大略省VRS系统的覆盖范围仅限于该省的一小部分地区。当VRS系统不可用时，Tulloch目前使用了PPP技术，尽管其较慢的解决方案收敛。为了提高公司的生产率，T​​ulloch Engineering有兴趣采用一种减少PPP收敛时间的技术，而不会影响定位准确性。拟议的研究的主要目的是开发实时GPS/Galileo PPP的算法和估计方法。反过来，这要求歧义参数将其固定在其正确的整数值中。但是，要意识到这一点的主要问题是接收器和卫星的存在 未校准的硬件延迟。为了克服这个问题，应生产并应用于PPP模型的改进的精确卫星产品和校准的硬件延迟。由于加拿大大多数高纬度地区都没有GNSS VRS网络，因此实时GPS/Galileo PPP可以成为精确定位应用程序的解决方案。因此，项目的结果将提高Tulloch工程（和其他加拿大公司）的生产率，效率和运营成本。其他行业（例如采矿和海上）也将从发达的技术中受益。该项目还将为加拿大的科学卓越做出贡献，作为创新技术的技术枢纽。