Global Assessment of UNB's Online Precise Point Positioning Software

摘要

The GPS Analysis and Positioning Software (GAPS) is a GPS precise point positioning (PPP) application developed at the University of New Brunswick (UNB). GAPS exists in two forms: a web-based positioning service, to which users can upload GPS observations to be processed, and a command-line executable version, which can be used to process large amounts of GPS data in a fast and convenient manner. The objective of this paper is to summarize the main approach used in the online version of GAPS; to present the modeling options available to the user through the online interface, and to assess the accuracy of GAPS by processing a global network of IGS stations for a period 1 year; and to assess the achievable accuracy of GAPS by comparing the results with external sources and similar evaluations encountered in the literature. Results obtained indicate that GAPS can achieve at least 1 cm level accuracy for any component at any location in the world.