The Vienna VLBI and Satellite Software VieVS: Status and Roadmap

Since its launch by the VLBI group at TU Wien in 2008, the Vienna VLBI and Satellite Software VieVS has grown considerably. What began as pure VLBI analysis software has evolved into a powerful conglomerate of various modules. The VLBI capabilities include a tool for simulating raw telescope data and the VLBI core module, with observation data simulation, analysis of source and satellite observations, and global solution options. The previously integrated scheduling tool was separated from VieVS-VLBI and further developed as a full-fledged standalone scheduling and simulation software, VieSched++, which is currently maintained at ETH Zurich. In addition to the VLBI-related modules, VieVS offers a tropospheric ray-tracing package called RADIATE. Another highlight is the independent open-source software package raPPPid for Precise Point Positioning, which enables the processing of low-cost or high-quality GNSS observations in highly adaptable PPP approaches. In this contribution, we provide an overview of all current open-source components of VieVS and give a preview of two new modules that will be publicly available in the future. These are VieCompy, a stand-alone combination software for estimating global parameters based on normal equations, and VieSOFT, a tool for correcting source structure at fringe-fitting level, which can also be used for correcting VLBI observations to the Genesis satellite.