SSPX 3.5

SSPX is a program to calculate strain/strain rate from displacement/velocity data in two and three dimensions. SSPX is a full fledged inverse modeling program to calculate best fitting deformation tensors given displacement or velocity vectors.

SSPX works equally well on small deformation problems such as computing strain rates from Global Positioning System (GPS) data, or large deformation problems such as computing the strain in a highly deformed discrete element model (DEM). SSPX was made for geologists, but it can be used by anyone interested in computing strain/strain rate from displacement/velocity data.

SSPX is based on StrainSimPro, a program by Richard Allmendinger to compute strain rates from GPS data. More information about SSPX can be found in Cardozo and Allmendinger (2009). SSPX is freeware for non-profit, academic purposes. To use the program for consulting, please contact Nestor Cardozo at nfcd@mac.com or Richard Allmendinger at rwa1@cornell.edu.