IGiK-TVGMF: A MATLAB package for computing and analysing temporal variations of gravity/mass functionals from GRACE satellite based global geopotential models

The determination and the analysis of temporal variations of gravity/mass functionals (TVGMFs) are one of the most important tasks within the Earth-science disciplines. This paper describes a MATLAB package, named IGiK-TVGMF (Instytut Geodezji i Kartografii-TVGMF). This MATLAB package allows computing and analysing TVGMF from Global Geopotential Models (GGMs) that developed on the basis of a monthly interval GRACE (Gravity Recovery And Climate Experiment) satellite gravimetry mission data. The IGiK-TVGMF package is developed using the MATLAB App Designer. Thirteen TVGMFs from seven GRACE computation centres can be determined at a single point or a grid of points, using the IGiK-TVGMF. The seasonal adjustment and the Principal Component Analysis/Empirical Orthogonal Function (PCA/EOF) methods were utilized to analyse and model TVGMFs. The IGiK-TVGMF is freely available for non-commercial, scientific research and academic purposes via https://github.com/Walyeldeen/Walyeldeen-Godah.