Lockheed is now tracking phones and walkie-talkies from space

Original Article ↗ Hacker News Discussion ↗

Lockheed-backed HawkEye 360 is deploying satellites that geolocate radio-frequency emitters on Earth—from satellite phones and walkie‑talkies to cellular towers and GPS jammers—by combining sensitive receivers with techniques like triangulation and direction finding. Commenters debate how feasible it is to detect ordinary smartphones from orbit, clarify that passive GPS receivers themselves are not being tracked, and note that similar SIGINT capabilities have existed for decades. Many see the system as a powerful tool for military and intelligence uses, while raising concerns about escalating, opaque global surveillance and the erosion of privacy.

How the RF tracking works (as discussed)

  • Several comments suggest classic RF geolocation:
    • Time-difference-of-arrival from multiple satellites in a 21-satellite LEO constellation.
    • Direction-of-arrival estimation using phased/coherent antenna arrays and algorithms like MUSIC.
    • Possible use of Doppler shift (similar to traditional SAR/distress-beacon systems).
  • The system is said to cover wavelengths from ~2 m to 2 cm (VHF to Ku-band).
  • Power calculations in the thread argue that even low-watt devices can be detectable from LEO with large, sensitive satellite antennas.

What is actually being tracked

  • Multiple commenters stress the system is for active RF emitters: satellite phones, walkie-talkies, cellular towers, GNSS jammers, not passive GPS receivers.
  • “Tracking GPS” is interpreted as detecting interference/jamming/spoofing in GNSS bands, not ordinary GPS devices.
  • Some misunderstanding arises over whether GPS receivers or local oscillators can be detected; consensus leans toward “no” for normal civilian receivers, “yes” for jammers and trackers that actively transmit.

Can ordinary cell phones be tracked from space?

  • Some argue it’s not feasible due to low power and noise; others counter with:
    • Amateur radio contacts with LEO satellites using a few watts and small antennas.
    • Emerging “direct-to-cell” LEO services (Starlink, AST, Lynk) showing that phones can both talk to and be heard by satellites.
  • Several note the harder problem is precise multilateration and separation of many overlapping signals, not raw detectability.
  • Overall: capability is plausible but exact precision and scale are unclear.

Precedents and “nothing new” sentiment

  • Commenters reference long-standing SIGINT constellations (e.g., TRUMPET, DSP/SBIRS) and argue the basic capability has existed for decades, now commercialized and miniaturized.
  • Others say extraordinary tracking claims (e.g., “every phone from space”) still lack public evidence.

Privacy, surveillance, and use cases

  • Strong concern about pervasive, global surveillance: RF tracking combined with IR and imaging satellites eroding any expectation of privacy.
  • Some argue such systems are used mainly for national security, military targeting (e.g., jammers, troop movements), not routine law enforcement.
  • Broader discussion touches on surveillance capitalism, increasing prosecutability as tech improves, and the tension between security benefits and civil liberties.