EarthView^® InSAR v3.1

Changes included in EV-InSAR v3.1

• NEW: initial release of Coherent Target Monitoring (CTM) optional module for multi-scene deformation analysis. CTM now supports non-linear modelling, interferogram enhancement and atmospheric iteration refinements.
• A bug affecting the EV-InSAR geometry calculations was fixed. All input ENVISAT pairs were affected with the exception of ENVISAT ascending mode pairs processed with EV-APP. It is recommended that the affected datasets be re-processed. Users who applied an interim EV-INSAR patch prior to processing need not re-process their ENVISAT data.
• The restriction on possible values for user defined ellipsoids has been relaxed somewhat.
• Corrected an issue where the external DEM was being used rather than the internally generated DEM when using "DEM mode with External DEM".
• Tiepoint reporting during refinement has been made more concise.
• The polynomial fitting order for flat Earth phase modeling has been increased from bicubic to 4X4. Better results have been noted following this change. The fitting order for dr/dh, dphi/dh etc. has also increased. Correspondingly, the number of required grid points has increased to 32X32 by default. As a result, the keen observer will notice differences in the interferograms produced by v3.1 as compared to v3.0 and earlier.
• The calculation of the sign of the reported perpendicular baseline has been adjusted to yield a sign consistent with DESCW.
• The option to input external DEMs in units other than metres (and specify a scale factor relating those units to metres) has been fixed.