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This is great. It’s the last piece I needed for my suburban missile guidance system! This will be the last year the Joneses survive the annual block party. Ca

This is great. It’s the last piece I needed for my suburban missile guidance system! This will be the last year the Joneses survive the annual block party. Can you do phased array radars next? I need the extra precision. There’s a few neighbors who don’t clean up after their dogs…

mNovak 3y ago
Well if we follow the historic development arc, frequency-scanning waveguide arrays would come next. Nicely, very minimal modification required, and you can start cranking up the antenna gain. Mostly just a physical fabrication challenge, which is hobby-approachable. https://www.radartutorial.eu/06.antennas/Phased%20Array%20Antenna.en.html#fca https://www.radartutorial.eu/06.antennas/Phased%20Array%20An...
megous 3y ago
You realize you can just go there and blow them up (ot shoot them up american style), right? Why the need for all the high tech?
gertrunde 3y ago
There is this: https://www.crowdsupply.com/krakenrf/krakensdr https://www.crowdsupply.com/krakenrf/krakensdr (Although they had to take the radar elements out of the firmware/software, most likely due to ITAR - ref link: https://forum.krakenrf.com/t/where-has-the-passive-radar-code-gone/98 https://forum.krakenrf.com/t/where-has-the-passive-radar-cod... )
- throwup238 3y ago
  Thank you for the link! I totally forgot about kraken. I cloned their repo in November 2022, probably in anticipation of the ITAR hiccup. Hopefully the radar code is there.
  - CobaltFire 3y ago
    I’d be interested in knowing if you’ve got that. I was going to buy one but the pull of the code put that on ice. I may pull the trigger if I can get the code!
    - thsksbd 3y ago
      If you are a foreigner, you're asking the OP to commit a federal crime. If you're an American national, you're likely asking the OP to commit s federal crime. ITAR's a mother.
    - throwup238 3y ago
      No sadly it looks like I got the wrong repo or I cloned it too early. It includes a little Python code but no firmware from what I can tell.
- topynate 3y ago
  A similar ITAR restriction on controlled reception pattern antennas means that GPS jamming is still much more of a problem than it needs to be. Three antenna elements are all you get, according to this: https://www.gpsworld.com/toughen-gps-to-resist-jamming-and-spoofing/ https://www.gpsworld.com/toughen-gps-to-resist-jamming-and-s...
  - CamperBob2 3y ago
    Interesting article. I wonder if any progress on the ITAR issue has been made since 2022? If Brad Parkinson can't steer ITAR in the direction of common sense, nobody can. (For those who don't know, he was the principal architect of the original Navstar GPS system.)
    - fullspectrumdev 3y ago
      Nothing can steer ITAR into the direction of sense. I’ve had to go to extremely ridiculous lengths to buy downlead cables for a headset recently because the cable was deemed ITAR.
    - wbl 3y ago
      I would prefer we not have homemade cruise missiles all over the place. The people who need them can make them after all.
      - numpad0 3y ago
        Sure, it's getting increasingly easier to just buy China made for ITAR-protected products. Night vision cameras, thermals, drones. They're fine, way more user friendly, often cheaper too.
        fullspectrumdev 3y ago
        There are now even Gen3 night vision tubes being made in China. They aren’t quite as good as US made ones yet, but it’s getting pretty close.
      - 3y ago
- rangestransform 3y ago
  if they really wanted to, they could make this a first amendment case, no?
  - thsksbd 3y ago
    It would likely end up breaking the first amendment instead.
- Animats 3y ago
  Wow. I haven't looked at the ITAR list in decades. There are lots of electronics items on there now that have useful civilian applications and can be built at low cost. You can build such things, but can't ship them cross-border to or from an ITAR country. I'm amazed at what people are building as hobbyist RF gear. I wonder what test equipment they have. The test equipment for GHz RF is very expensive. If you build it and it's not working, you may need test gear. (I tried to build a LIDAR in 1990s. It didn't work, and I didn't have access to gear that would let me see what was happening up there.)
spitfire 3y ago
These should help. Tactical and Strategic Missile Guidance, Seventh Edition https://www.amazon.com/Tactical-Strategic-Missile-Guidance-Seventh/dp/162410584X https://www.amazon.com/Tactical-Strategic-Missile-Guidance-S... Tactical missile warheads https://www.amazon.com/Tactical-Warheads-Progress-Astronautics-Aeronautics/dp/1563470675 https://www.amazon.com/Tactical-Warheads-Progress-Astronauti...
- muziq 3y ago
  Missile Guidance and Control Systems https://www.amazon.co.uk/Missile-Guidance-Control-Systems-Siouris/dp/0387007261 https://www.amazon.co.uk/Missile-Guidance-Control-Systems-Si...
- deleted 3y ago
  [deleted]
- secondcoming 3y ago
  Ha, I mentioned the first book the other day on here.
- Symmetry 3y ago
  I'm sure the OP has already read his Skolnik given his comment but for those following along that's usually the best place to start. https://www.amazon.com/Radar-Handbook-Third-Merrill-Skolnik/dp/0071485473 https://www.amazon.com/Radar-Handbook-Third-Merrill-Skolnik/...
  - spitfire 3y ago
    There's also Fundamentals of Astrodynamics https://www.amazon.com/Fundamentals-Astrodynamics-Second-Dover-Physics/dp/0486497046 https://www.amazon.com/Fundamentals-Astrodynamics-Second-Dov... Which builds up from first principles a ballistic missile defence system. Always useful to have.
deleted 3y ago
[deleted]
Modified3019 3y ago
>phased array Jon Kraft apparently is doing a series on that: https://www.youtube.com/@jonkraft https://www.youtube.com/@jonkraft
jcims 3y ago
If someone can figure out how to hack the starlink dish frontend we'll have a hell of a capability to tinker with.
rlt 3y ago
FBI has entered the chat
femto 3y ago
You forgot the actual missile bit, to go with your guidance system. Don't worry though, Bruce Simpson has that covered for you: "A DIY Cruise Missile: Watch me build one for under $5,000" http://www.interestingprojects.com/cruisemissile/ http://www.interestingprojects.com/cruisemissile/

mNovak 3y ago

Well if we follow the historic development arc, frequency-scanning waveguide arrays would come next. Nicely, very minimal modification required, and you can start cranking up the antenna gain. Mostly just a physical fabrication challenge, which is hobby-approachable. https://www.radartutorial.eu/06.antennas/Phased%20Array%20Antenna.en.html#fca https://www.radartutorial.eu/06.antennas/Phased%20Array%20An...

megous 3y ago

You realize you can just go there and blow them up (ot shoot them up american style), right? Why the need for all the high tech?

gertrunde 3y ago

There is this: https://www.crowdsupply.com/krakenrf/krakensdr https://www.crowdsupply.com/krakenrf/krakensdr (Although they had to take the radar elements out of the firmware/software, most likely due to ITAR - ref link: https://forum.krakenrf.com/t/where-has-the-passive-radar-code-gone/98 https://forum.krakenrf.com/t/where-has-the-passive-radar-cod... )

throwup238 3y ago
Thank you for the link! I totally forgot about kraken. I cloned their repo in November 2022, probably in anticipation of the ITAR hiccup. Hopefully the radar code is there.
- CobaltFire 3y ago
  I’d be interested in knowing if you’ve got that. I was going to buy one but the pull of the code put that on ice. I may pull the trigger if I can get the code!
  - thsksbd 3y ago
    If you are a foreigner, you're asking the OP to commit a federal crime. If you're an American national, you're likely asking the OP to commit s federal crime. ITAR's a mother.
  - throwup238 3y ago
    No sadly it looks like I got the wrong repo or I cloned it too early. It includes a little Python code but no firmware from what I can tell.
topynate 3y ago
A similar ITAR restriction on controlled reception pattern antennas means that GPS jamming is still much more of a problem than it needs to be. Three antenna elements are all you get, according to this: https://www.gpsworld.com/toughen-gps-to-resist-jamming-and-spoofing/ https://www.gpsworld.com/toughen-gps-to-resist-jamming-and-s...
- CamperBob2 3y ago
  Interesting article. I wonder if any progress on the ITAR issue has been made since 2022? If Brad Parkinson can't steer ITAR in the direction of common sense, nobody can. (For those who don't know, he was the principal architect of the original Navstar GPS system.)
  - fullspectrumdev 3y ago
    Nothing can steer ITAR into the direction of sense. I’ve had to go to extremely ridiculous lengths to buy downlead cables for a headset recently because the cable was deemed ITAR.
  - wbl 3y ago
    I would prefer we not have homemade cruise missiles all over the place. The people who need them can make them after all.
    - numpad0 3y ago
      Sure, it's getting increasingly easier to just buy China made for ITAR-protected products. Night vision cameras, thermals, drones. They're fine, way more user friendly, often cheaper too.
      - fullspectrumdev 3y ago
        There are now even Gen3 night vision tubes being made in China. They aren’t quite as good as US made ones yet, but it’s getting pretty close.
    - 3y ago
rangestransform 3y ago
if they really wanted to, they could make this a first amendment case, no?
- thsksbd 3y ago
  It would likely end up breaking the first amendment instead.
Animats 3y ago
Wow. I haven't looked at the ITAR list in decades. There are lots of electronics items on there now that have useful civilian applications and can be built at low cost. You can build such things, but can't ship them cross-border to or from an ITAR country. I'm amazed at what people are building as hobbyist RF gear. I wonder what test equipment they have. The test equipment for GHz RF is very expensive. If you build it and it's not working, you may need test gear. (I tried to build a LIDAR in 1990s. It didn't work, and I didn't have access to gear that would let me see what was happening up there.)

spitfire 3y ago

These should help. Tactical and Strategic Missile Guidance, Seventh Edition https://www.amazon.com/Tactical-Strategic-Missile-Guidance-Seventh/dp/162410584X https://www.amazon.com/Tactical-Strategic-Missile-Guidance-S... Tactical missile warheads https://www.amazon.com/Tactical-Warheads-Progress-Astronautics-Aeronautics/dp/1563470675 https://www.amazon.com/Tactical-Warheads-Progress-Astronauti...

muziq 3y ago
Missile Guidance and Control Systems https://www.amazon.co.uk/Missile-Guidance-Control-Systems-Siouris/dp/0387007261 https://www.amazon.co.uk/Missile-Guidance-Control-Systems-Si...
deleted 3y ago
[deleted]
secondcoming 3y ago
Ha, I mentioned the first book the other day on here.
Symmetry 3y ago
I'm sure the OP has already read his Skolnik given his comment but for those following along that's usually the best place to start. https://www.amazon.com/Radar-Handbook-Third-Merrill-Skolnik/dp/0071485473 https://www.amazon.com/Radar-Handbook-Third-Merrill-Skolnik/...
- spitfire 3y ago
  There's also Fundamentals of Astrodynamics https://www.amazon.com/Fundamentals-Astrodynamics-Second-Dover-Physics/dp/0486497046 https://www.amazon.com/Fundamentals-Astrodynamics-Second-Dov... Which builds up from first principles a ballistic missile defence system. Always useful to have.

deleted 3y ago

[deleted]

Modified3019 3y ago

>phased array Jon Kraft apparently is doing a series on that: https://www.youtube.com/@jonkraft https://www.youtube.com/@jonkraft

jcims 3y ago

If someone can figure out how to hack the starlink dish frontend we'll have a hell of a capability to tinker with.

rlt 3y ago

FBI has entered the chat

femto 3y ago

You forgot the actual missile bit, to go with your guidance system. Don't worry though, Bruce Simpson has that covered for you: "A DIY Cruise Missile: Watch me build one for under $5,000" http://www.interestingprojects.com/cruisemissile/ http://www.interestingprojects.com/cruisemissile/