Files with landsat extension are associated with the Thematic Mapper program.
LANDSAT file extension - EOSAT's Landsat Thematic Mapper data file
What is landsat file? How to open landsat files?
File type specification:
The landsat file extension is used for data captured from Thematic Mapper. Thematic Mapper was multi spectral imaging sensor added on Landsats 4, 5, and 6 satellites. It is obsolete file format, don't supported by any known application.
This landsat file type entry was marked as obsolete and no longer supported file format.
This type of file is no longer actively used and is most likely obsolete. This is typically the case for system files in old operating systems, file types from long discontinued software, or previous versions of certain file types (like documents, projects etc.) that were replaced in higher versions of their original programs.