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Is Starlink A Secret Radar Constellation?

Noise In Space3 HN recommenders · recommended in 1 month, 2026–2026
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explainer · advanced · 2026–2026 on HN

A 105-minute technical deep dive from Noise In Space evaluating whether Starlink satellites could work as synthetic aperture radar. It covers SAR signal-to-noise, amplifiers, antennas, duplexing, phased array beamforming and simulations of V2 Mini and V3 sate…

Cited as a rigorous radio-engineering analysis of what radar capability Starlink could plausibly have.

8 comments from Hacker News

@cmrx642026-05 · in “America's Expanding Domestic Surveillance”

and soon from space? radio engineering breakdown of starlink radar capabilities, it’s a pretty impressive bird if you were designing it only for that: ▶ this video

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@Enginerrrd2026-05 · in “Starship V3”

Yeah, I agree. A massive radar network, passive or active is the most likely possibility I have come across. You'd need a LOT of compute at each node to get the most out of the network. I found this video[1] to be a pretty convincing analysis of the absolute max capability you could expect, and it would indeed be impressive. [1] ▶ this video

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@yellowbkpk2026-05 · in “Starship V3”

Check out this video that goes into a very deep technical explanation about how the satellites can be used as a Synthetic Aperature Radar to build a realtime representation of the entire globe at meters of resolution: ▶ this video

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@defrost2026-08 · in “Battle of the Beams”

The US, UK, AU, and Russia have been back and forth on leadership relative to some metric or another wrt Over the Horizon systems throughout the post war period. > the world's finest radar and navigation tech Hadn't realised the UK had a sat nav constellation up (nav tech) and .. are we counting Starlink as radar tech? * link * ▶ this video

@defrost2026-07 · in “SpaceX wants to launch 100k more Starlink satellites – for 100x the bandwidth”

Think of it less as a comms system with a small increase in bandwidth, and more as a radar system with a larger increase in resolution. * ▶ this video