You'll want to be sure to test FITS thoroughly for your use case. It really needs some love. It's using some outdated tools and has a number of bugs. I submitted a bunch of PRs to the project this summer, but maintaining FITS is currently not a priority at Harvard, though I was assured that its not abandoned.
As a digital preservation aside, folks may be interested in OCFL[1], which is a preservation focused storage layout specification that had its 1.0 release last year.
As a digital preservation aside, folks may be interested in OCFL[1], which is a preservation focused storage layout specification that had its 1.0 release last year.
[1] https://ocfl.io/