TY - JOUR JF - kntu-jgit JO - jgit VL - 1 IS - 1 PY - 2013 Y1 - 2013/12/01 TI - A Few Aspects of Precise Point Positioning and Presentation of GPSS Toolbox TT - جنبه‌هایی از تعیین موقعیت مطلق دقیق و معرفی نرم‌افزار GPSS N2 - Some theoretical and numerical problems of Precise Point Positioning (PPP) and the methods to resolve these problems are among the main objectives of this paper. In this conjunction a GPS toolbox is presented. GPSS is a MATLAB® GPS software for PPP, which was developed by the first author. Furthermore other supplementary functions were embedded in this toolbox for GPS data processing, and demonstration of ionospheric and tropospheric models. Dynamic model construction’s difficulties depend on the unknowns while other problems are related to the nature of PPP. Understanding these problems is important for investigations and research in this field. SP - 92 EP - 100 AU - Asgari, Jamal AU - Zangane Nejad, Farzaneh AU - Zaminpardaz, Safura AD - Isfahan University KW - GPS KW - Troposphere KW - PPP KW - EKF KW - GPSS UR - http://jgit.kntu.ac.ir/article-1-58-en.html DO - 10.29252/jgit.1.1.92 ER -