Variance/Covariance Matrix Tool
The GUT Variance/Covariance Matrix Tool is dedicated to the computation of the variance and cross-covariance functions of the GOCE gravity field related quantities (e.g. geoid height, gravity anomaly/disturbance, radial gravity gradient, vertical deflections, etc.) on an equi-angular geographical grid from the GOCE full variance/covariance matrix of spherical harmonic coefficients by means of error propagation theory principles.
The operated computation is rigorous, which means that no approximation is carried out in the calculations. You can limit the analysis in the geographical region or in a spectral interval of interest and can incorporate built-in filtering or tapering methods in the computation.
The tool also offers you the option to calculate the variance map as point value on grid centres or as mean value on grid cell.
The core tool was initially written by George Balmino in Fortran language and subsequently revised and extended by Rory Bingham and Bruno Lucas.
The tool is provided on a best effort basis so support is not guaranteed.
If you encounter any problems or bugs with the tool, please email the GUT Support Team, who will try to reply as soon as possible.