GPS-View: Visualising geodetic GPS time series analyses
Local, regional and worldwide Global Positioning System (GPS) networks have long been used to monitor geophysical processes which vary throughout the temporal, frequency and spatial domains. Geodetic GPS time series often exhibit complex non-linear behavior which is a combination of real world geophysical signals and systematic artifacts caused by such things as aliasing of high frequency periodic motion and errors within the processing models or solution strategies. In this paper, we describe a beta version of an online, interactive tool designed to assist in the visualisation of geodetic GPS time series analyses. The tool, referred to as GPS-View, allows for interactive viewing of GPS time series parameter estimates for any given GPS analysis centre solution, or their differences. Using both numeric and chart output from Matlab time series analyses performed in advance, the viewer utilises the open source MapServer application as a web-mapping engine to visualise the spatial distribution of the time series output. GPS-View aids in the understanding of recent advances in GPS analysis strategies, helping to minimise the error contribution to geodetic GPS time series and further understand global geophysical processes.