Use Convert TOPSAR Data to read and convert the raw TOPSAR format data files to physical units (floating-point data). The Cvv file is converted to sigma zero. The incidence angle file is converted to 0-180 degrees angles. The correlation file is converted to 0-1 values. The DEM is converted to meters.

1. From the Toolbox, select Radar > TOPSAR > Convert TOPSAR Data. The Enter TOPSAR Filename dialog appears.
2. Select a data file and click Open. The TOPSAR Conversion Parameters dialog appears.
3. Select the check boxes next to the filenames of the files you want to convert.
4. Perform optional spatial subsetting by clicking Spatial Subset.
5. Select output to File or Memory.
6. Click OK. ENVI places all of the converted files into a single output file with a band for each input file.