I haven't talked to him in a few years, but used to be good friends with a meteorology researcher at Purdue and Fortran was virtually all he knew, it's so heavi

I haven't talked to him in a few years, but used to be good friends with a meteorology researcher at Purdue and Fortran was virtually all he knew, it's so heavily used. When I first started out in GEOINT processing, a lot of our code (NRO code) at the library level was still Fortran, but that was mostly older libraries. Anything written after 2005 or so was predominantly C++. I don't really keep up to date with the constellation status since I haven't worked there in a while now, but there were still a few orbital platforms older than that back around 2017 or so and the code for handling them was still largely Fortran. We never used Fortran directly, though, only bindings for C++, though I did have to learn a tiny bit of Fortran to hack on those once.