The header files (.hdr) of ENVI files are text files which contain the size of the file (pixels and lines) geospatial information and other meta data such as wavelengths, data units etc.,
Not all programs are aware of all items in then header file and some may become lost during processing. ARSF-DAN have made a script available which can copy attributes from one header to another. The script can be downloaded from https://github.com/pmlrsg/arsf_tools and is run using:
copy_header_info.py f221013_mapped_osng.bil.hdr \ f221013_nadir_mapped_osng.hdr \ -k "map info" "projection info" "wavelength"
To show the available fields the following script (also from the arsf_tools repo) can be used: