The top secret URSALA, RAQUEL, and FARRAH satellites (2025)
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The top secret URSALA, RAQUEL, and FARRAH satellites (2025)
Unofficial Hacker News client; not affiliated with Y Combinator.
Almondsetat · · focus · HN ↗
walrus01 · · focus · HN ↗
If you think the public DEM/DSM datasets like the ASTER GDER v3 or SRTM GL1 V3 are pretty good, I would bet that the DoD has things far more accurate than those as digital models of the surface and built environment of the earth's surface.
beerandt · · focus · HN ↗
It was good enough then to track individuals movement and 'replay' where they had been over the last few days to figure out where they came from and associate them with other people/ vehicles/ rf signatures.
I think it's safe to assume that the quality kept quietly improving from orbit since then- it's just too good to publicly release / declassify.
dmd · · focus · HN ↗
walrus01 · · focus · HN ↗