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A comment on Lockheed is now tracking phones and walkie-talkies from space. Parent comment

Re:Lockheed is now tracking phones and walkie-talkies from s... by constantly on Saturday November 18, 2023 @03:20PM (#38323946)
SBIRS is the upgrade, previously it was DSP, since the 70s.

https://missilethreat.csis.org/defsys/dsp/

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