Multi-constellation GNSS Precise Point Positioning

多星座GNSS精密单点定位

• 批准号: 239057-2013
• 负责人: Santos, Marcelo
• 金额: $ 1.75万
• 依托单位: University of New Brunswick
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 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=570557
• 关键词: Multi; constellation; GNSS; Precise; Point

My research project intends to take advantage of the availability of new satellite navigation signals in geodetic positioning and precise navigation, and my recent developments in our in-house precise point positioning (PPP) software (GAPS) and our effort in using numerical weather prediction information for modelling the neutral-atmosphere, including the recently VMF1 service opened at UNB. Until recently, only 2 GPS frequencies were available. The modernization of GPS, the consolidation of GLONASS and the implementation of Galileo, has offered more frequencies, which open more opportunities for positioning in more challenging environments, as well as to address the same problems in a novel ways, such as dealing with the ionosphere. I want to continue with my current research taking advantage of the growing availability of GNSS satellite signals. Currently, in addition to the original GPS two-frequencies, there are the second civilian code (L2C) and the third L5 GPS frequency in a few satellites, initial Galileo signals, plus the GLONASS signals. During the timeframe of this Discovery Grant, the constellation of L5 and Galileo satellites will increase. My research project intends to take advantage of these new signals in order to investigate their application in precise geodetic positioning and navigation by: - taking advantage of multi-constellation inter-frequency combinations targeting ambiguity resolution and ionospheric delay modelling; - continue with our investigation on the applicability of neutral-atmospheric delay modelling based on numerical weather prediction models, targeting a multi-constellation scenario; and, - push the limit of "network-like" high-accuracy geodetic networks targeting the realization of regional frames linked to the ITRF using PPP. I plan to continue working on enhancements of our in-house software suite GAPS, for precise point positioning and to use real and simulated signals, in the absence of the former.

我的研究项目打算利用新的卫星导航信号在大地测量定位和精确导航中的可用性，以及我在内部精确单点定位（PPP）软件（GAPS）方面的最新进展，以及我们在使用数值天气预报信息对中性大气进行建模方面所做的努力，包括最近在 UNB 开放的 VMF1 服务。直到最近，只有 2 个 GPS 频率可用。 GPS 的现代化、格洛纳斯 (GLONASS) 的整合和伽利略 (Galileo) 的实施提供了更多的频率，这为在更具挑战性的环境中定位提供了更多机会，并以新颖的方式解决相同的问题，例如处理电离层。我想利用日益增多的 GNSS 卫星信号可用性继续我目前的研究。目前，除了原有的GPS双频外，少数卫星中还有第二民用码（L2C）和第三L5 GPS频率，最初的伽利略信号，加上格洛纳斯信号。在本次发现拨款期间，L5 和伽利略卫星的星座将会增加。我的研究项目打算利用这些新信号，通过以下方式研究它们在精确大地测量定位和导航中的应用： - 利用多星座异频组合来实现模糊度解析和电离层延迟建模； - 继续研究基于数值天气预报模型的中性大气延迟模型的适用性，针对多星座场景；和， - 突破“类网络”高精度大地测量网络的限制，目标是使用 PPP 实现与 ITRF 链接的区域框架。 我计划继续致力于增强我们的内部软件套件 GAPS，以实现精确的点定位，并在没有前者的情况下使用真实和模拟信号。