Landsat data provided by the USGS are distributed as a single file in an archived and zipped ".TAR" format. These files must be extracted and uncompressed before you can use them.

In ENVI 5, open the metadata file (MTL.txt)  through File> Open as> Landsat> GeoTIFF with Metadata to import Landsat Collection 1 Level 1 image with all bands in the correct order.

At the end of 2020, USGS released Landsat Collection 2. There are enhancements and changes between Collection 1 and Collection 2 Level-1 metadata, the current highest version of ENVI (ENVI 5.6) has not yet supported the reading of Landsat Collection 2 MTL files.

Modifying the MTL file in batches manually is time-consuming, here is a script to realize it.

• A source code based on python 3.6;
• An executable file for more convenient use bundled by package PyInstaller;
• Sample files in inputs folder and outputs folders.

Put the MTL files of Collection 2 format into the inputs folder in the same directory. After the script runs, the converted MTL file of Collection 1 format will be generated in the outputs folder in the same directory.

Note: There is no GROUP of PRODUCT_PARAMETERS in the sample MTL files, so "Can't find PRODUCT_PARAMETERS" will be printed. This error has no effect on the result.