GrafLab (GRAvity Field LABoratory)
GrafLab is a MATLAB-based graphical user interface program for computing functionals of the geopotential up to ultra-high degrees and orders, which allows: evaluation of 38 functionals of the geopotential up to ultra-high degrees and orders, evaluation of commission error of 26 functionals using full variance-covariance matrix of spherical harmonic coefficients, depiction of the computed data on a map.
- Package available at https://github.com/blazej-bucha/graflab
- Cookbook showing basic and advanced applications using the command line (NEW)
- Bucha, B., Janák, J., 2013. A MATLAB-based graphical user interface program for computing functionals of the geopotential up to ultra-high degrees and orders. Computers & Geosciences 56, 186-196, http://dx.doi.org/10.1016/j.cageo.2013.03.012.
isGrafLab (Irregular Surface GRAvity Field LABoratory)
isGrafLab is a modified version of GrafLab that allows accurate and fast computation of functionals of the geopotential at dense grids on irregular surfaces such as the Earth's surface. It employs the highly efficient lumped coefficients approach for surface spherical harmonic synthesis of the functionals and their radial derivatives at regular surfaces (sphere or ellipsoid of revolution), and the Taylor series expansions to continue the functionals to the irregular surface. All the other options available in GrafLab, such as the possibility to use three different approaches to compute the fully normalized associated Legendre functions, the graphical user interface or data plotting, are also available in the new software.
- Package available at https://github.com/blazej-bucha/isgraflab
- Cookbook showing basic and advanced applications using the command line (NEW)
- Bucha, B., Janák, J., 2014. A MATLAB-based graphical user interface program for computing functionals of the geopotential up to ultra-high degrees and orders: Efficient computation at irregular surfaces. Computers & Geosciences 66, 219-227, http://dx.doi.org/10.1016/j.cageo.2014.02.005.
