EarthView® (May 2004)


This release solves a number of issues with EarthView® products, introduces an optional Coherent Target Monitoring (CTM) module for EarthView InSAR, and a new product for DEM editing and mosaicking (EarthView DEMED). Some key advantages of this release are:  

 

 

EarthView® APP v3.1

·         Updated Radarsat database files to include RADARSAT payload file #29.

·         A problem was fixed with the Flexible Block Adaptive Quantizer (FBAQ) implementation which eliminated a major source of quantization noise that had been visible in low signal-to-noise scenes. This problem had made beam boundaries more evident under those conditions.    

·         A problem with stitching multiple ENVISAT scenes together has been fixed.    

·         A new ICE Look-Up Table (LUT) has been provided for ENVISAT.    

·         The default browser for Windows has been updated to be suitable for Windows XP.    

·         A problem with the pixel tool for ENVISAT Alternating Polarization (AP) Single Look Complex (SLC) data has been fixed.    

 

EarthView® 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.

 

EarthView® Stereo v3.1

·         NEW: A SAR ortho-rectification module was added to EV-Stereo v3.1. The final output products now include a DEM image and ortho-rectified master and slave images.

·         Generic Mapping Tools (GMT 3.0 and GMT 3.3.4) were upgraded to GMT 4.0b. This fixed a bug in gridding and improved the speed of the gridding process.

·         Several bugs were fixed for ENVISAT metadata extraction.

 

EV-DEMED v3.0

·         NEW: Initial release of the DEM editing workstation. This new product was designed to significantly enhance the production and utility of large area (i.e. multi-image) DEMs produced from spaceborne SAR data. It supports the merging of several DEMs to create one composite DEM, edit "spikes" and "wells", re-project and format merged DEMs, and automatically delineate and correct elevations of water bodies.