Project summary (from the PSIC4 website)

The PSI techniques are a group of new and technologically advanced technologies for measuring relative position, which is why people outside the radar community generally have little or no experience in utilising the positional data produced by them. During the Fringe 2003 Workshop, “Advances in SAR Interferometry from ERS and ENVISAT Missions" organised in ESRIN in December 2003 it was recognised that amongst the end-users of PSI-produced data there is uncertainty about the accuracy and trustworthiness of the measurements. This uncertainty was also perceived to be hindering both the wider acceptance of PSI-products and the development of the emerging commercial PSI-market. Therefore, ESA initiated the Persistent Scatterer Interferometry Codes Cross-Comparison And Certification (PSIC4) project to produce reliable information about the accuracy and dependability of these methodologies.

The work was divided into two phases. The first concerned the parallel processing of identical stacks of data by the participating EO service providing contractors. The second was an independent validation of the results carried out by a separate consortium of geological survey experts.

The following documents provide more information on: PSIC4 Final Report , PSIC4 Final Report - Appendix A , PSIC4 Final Report - Appendix B. Also see: http://earth.esa.int/psic4/