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: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=636925
• 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的可用性，以及我最近在我们的内部精确单点定位（PPP）软件（GAPS）和我们在使用数值天气预报信息建模中性大气方面的努力的发展，包括最近在UNB开放的VMF 1服务。直到最近，只有两个GPS频率可用。全球定位系统的现代化、全球轨道导航卫星系统的合并和伽利略系统的实施提供了更多的频率，这为在更具挑战性的环境中进行定位以及以新的方式解决同样的问题提供了更多的机会，例如处理电离层问题。我想继续我目前的研究，利用越来越多的GNSS卫星信号的可用性。目前，除了原有的GPS双频外，还有第二民用码（L2 C）和第三民用码（L5）的GPS频率，在少数卫星上，最初的伽利略信号，加上GLONASS信号。在这一发现补助金的时间范围内，L5和伽利略卫星的星座将增加。我的研究项目打算利用这些新的信号，以便研究它们在精确大地定位和导航中的应用，具体做法是：-利用多星座频率间组合，以解决模糊度和电离层延迟建模为目标;-继续研究基于数值天气预报模型的中性大气层延迟建模的适用性，以多星座情景为目标;以及，-突破“网络状”高精度大地测量网络的限制，目标是实现使用PPP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，以实现精确的单点定位，并在没有真实的和模拟信号的情况下使用前者。