For my PhD project I need to work with Level 0/RAW ERS data, collecting all possible info recorded during the acquisition step and used in the focusing stage. I have the permission from ESA to download them through Eolisa. Unfortunately currently the files have extension .E1 or .E2 and and not .dat (as requested in ENVI that reads ERS-1 Level-0 with extension dat*.001, CEOS format). Is there someone who has worked with this type of data? Is under development an update in ENVI to consider also this type of data? Thank you in advance for your help.