The development of the G-Nut library and specific user applications is primarily based on a scientific work with focus on the stimulating an inter-disciplinary exploitation of GNSS observations. The Precise Point Positioning, developed by Zumberge et al. (1997), provides a highly efficient and autonomous technique for various applications if relevant precise products are available (such as provided by the International GNSS Service). By developing in-house software packages, we would like to contribute to a deep expertize in multi-GNSS data use by updating/enhancing various GOP scientific products (contributing to EUREF, IGS, E-GVAP, etc.).
The current status of the G-Nut project can be identified as a "testing stage". The core library data members and functions has been implemented together with first applications. Stable functionality has been demonstrated for off-line and real-time processing (follow GOP web-pages). Providing public applications is a time-consuming task (for which we have not yet sufficient man-power), the release of end-user applications is done in step-by-step process. So in case of interest for further developments, track our web-pages occasionally or join the G-Nut mailing list.
The user applications and relevant parts of the G-Nut core library are provided 'AS IS'. There is no warranty of any kind and we do not take responsibility for any errors or omissions found in the implementation, documentation or distribution of application packages. Please understand that there may be bugs and errors and use packages at your own risk only.
The source code of user applications and relevant parts of the G-Nut core library is released under the GNU General Public License (GPL) and thus available for any further modifications and redistribution under given conditions. Only user applications are, however, available for download together with relevant parts of the G-Nut core library. The complete library code is not intended for the distribution under normal circumstances, but to a limited agreed partners or significant co-developers only.
Following third-party libraries were included in the G-Nut core library developments:
- Newmat C++ Matrix Library
- Pugixml - Light-weight, simple and fast XML parser for C++
- Core developers: J. Douša and P. Václavovic
- Contributors: G. Gyori, M. Eliaš
Dousa J, Vaclavovic P (2014) Real-time zenith tropospheric delays in support of numerical weather prediction applications. Advances in Space Research (2014), Vol 53, No 9, pp 1347-1358, doi:10.1016/j.asr.2014.02.021, PDF.
Vaclavovic P, Dousa J, Gyori G (2013), G-Nut software library - state of development and first results, Acta Geodynamica at Geomaterialia, pp 431-436, Vol. 10, No. 4 (172), doi:10.13168/AGG.2013.0042. PDF (or, alternatively, here).
Dousa J and Vaclavovic P (2013), Real-time ZTD estimates base on Precise Point Positioning and IGS real-time orbit and clock products, In: 4th International Colloquium Scientific and Fundamental Aspects of the Galileo Programme, 4-6 December 2013, Prague, Czech Republic. PDF.
Vaclavovic P and Dousa J (2013), Anubis – a tool for quality check of multi-GNSS observation and navigation data In: 4th International Colloquium Scientific and Fundamental Aspects of the Galileo Programme, 4-6 December 2013, Prague, Czech Republic. PDF.