I love when HN commenters get out of water on topics. The GRACE retreivals to reconstruct mass changes for "mascons" that are several hundred kilometers in width\height take a month of static overpasses and incredible mathematics and signal processing. There is absolutely no way that their data could be used to locate a submarines, ever.
Lolll it’s my fave, especially when it’s after a sibling comment that explains “uh no” using ~7th grade science
Interesting, seems hard to zero out the clouds and air density, and bodies of water