Thread

UK military jamming other nations' satellites to defend itself, BBC told

171 points · 213 comments · thm

ck2 · 1790186591 · focus · HN ↗
this should end well
or a whole new technology invented other than radio waves for data transmission
are any satellites using laser downlink yet or is line-of-sight too temperamental with weather and planes?
1. redsocksfan45 · 1790186947 · focus · HN ↗
  [dead]
2. cheschire · 1790186988 · focus · HN ↗
  Let’s launch hard drives back and forth between earth and LEO. Like sneakernet in space.
  1. chris_va · 1790187272 · focus · HN ↗
    never underestimate the bandwidth of a station wagon full of tapes reentering the atmosphere
    ErroneousBosh · 1790202845 · focus · HN ↗
    I have just decommed an old datacentre that we're moving out of and this is basically what my 30-year-old travel-worn farm truck Range Rover looks like right now.
    saltcured · 1790204338 · focus · HN ↗
    The hard part is getting an IO card with built-in hardware decelerator
  2. ck2 · 1790187301 · focus · HN ↗
    railgun microSD
    but seriously, the first spy satellites used to drop film rolls and they had a crazy way for the military to track and catch them via planes
    * <a href="https://en.wikipedia.org/wiki/CORONA_(satellite)" rel="nofollow">https://en.wikipedia.org/wiki/CORONA_(satellite)
    jasomill · 1790237057 · focus · HN ↗
    What's crazier is that there was a similar system to retrieve people.
    <a href="https://en.wikipedia.org/wiki/Fulton_surface-to-air_recovery_system" rel="nofollow">https://en.wikipedia.org/wiki/Fulton_surface-to-air_recovery...
  3. pixl97 · 1790187311 · focus · HN ↗
    Been there, done that.
    <a href="https://en.wikipedia.org/wiki/CORONA_(satellite)" rel="nofollow">https://en.wikipedia.org/wiki/CORONA_(satellite)
    They'd drop their film back down to earth.
  4. GolfPopper · 1790187407 · focus · HN ↗
    U.S. spy satellites were returning film payloads to Earth as late as 1986:
    <a href="https://en.wikipedia.org/wiki/KH-9_Hexagon" rel="nofollow">https://en.wikipedia.org/wiki/KH-9_Hexagon
    a4isms · 1790190091 · focus · HN ↗
    That was the McGuffin for the 1963 book "Ice Station Zebra" (and the 1968 film adaptation). A satellite with pictures of every missile launch site in the US malfunctions and is knocked off its planned orbit that would overfly the Soviet Union, so the race is on to figure out where they would drop the film and prevent them from recovering it.
    The story was based on a real-life incident in 1959:
    <a href="https://en.wikipedia.org/wiki/Discoverer_2" rel="nofollow">https://en.wikipedia.org/wiki/Discoverer_2
  5. nefarious_ends · 1790188470 · focus · HN ↗
    [dead]
  6. someonebaggy · 1790188814 · focus · HN ↗
    If they're heavy enough, it doubles as a space fountain.
3. pixl97 · 1790187220 · focus · HN ↗
  I mean isn't space X testing satellites with sat to sat lasers?
  In that case you don't need to ground lasers, you just beam the data where you have unjammed communications with the cost of higher latency.
  1. iwontberude · 1790187488 · focus · HN ↗
    [dead]
  2. LorenDB · 1790187574 · focus · HN ↗
    More than testing. That is their primary on-orbit link method for Starlink satellites as of 2.5 years ago: <a href="https://www.pcmag.com/news/starlinks-laser-system-is-beaming-42-million-gb-of-data-per-day" rel="nofollow">https://www.pcmag.com/news/starlinks-laser-system-is-beaming...
4. exe34 · 1790187693 · focus · HN ↗
  Neutrinos
  1. Kevcmk · 1790188090 · focus · HN ↗
    Gravitational waves
    bigiain · 1790291963 · focus · HN ↗
    illudium q-36 space modulator
5. notahacker · 1790188873 · focus · HN ↗
  Laser links for satellites work fine, but if you're up against a 10 year old spy satellite or you're selectively jamming their SAR (radar imaging) or GLONASS positioning rather than their comms...

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