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this post was submitted on 16 Apr 2026
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by coupling this with the open source stinger project i saw last month do i suddenly have my own patriot defense system?
Nah, that missile was visual tracking. Not radar guided. Also, way too small to intercept anything going high and fast which is generally what the patriot is for. Intercepting an aircraft requires a really powerful motor to give it enough speed and altitude to catch a plane.
This radar could maybe be used with a semi active radar guided missile, where the ground radar lights up the target and the missile just has a detector that homes in on that, which is what early patriots used. But it’s only got a 20km range which isn’t really enough for an anti aircraft system, unless all you’re worried about is something slow and low to the ground like a helicopter or cesna. Need enough time for the radar to detect, identify and lock the target, fire the missile, and have it track to the target, and something moving fast and high will be in and out of the range of the radar before all that can be done. Especially if the target is high up at 10km, which would half the effective range.
I though SARH missiles work by having an off missile system provide target location information and the missile just knows where it is via gps or IMU data. (and thus brings the missile from where it is to where it isint. This is a half joke)
It depends on the system, often times they’ll have additional guidance assistance, such as an infrared seeker or some inertial posturing system. SARH just means the main guidance is provided by a seeker picking up radar from a external emitter painting the target. As supposed to ARH (active radar homing) where the missile has its own emitter and detector. Most systems aren’t just one thing these days, for the sake of redundancy and error correction.
Would a network of multiple of this device with overlapping coverage work?
Probably not with SARH, multiple emitter sources would just complicate the job of the detector on the missile. Like I’m sure it could be made to work with a bit of compensation, but it would add cost and complexity to the seeker on the missile, which sort of defeats the point of such a system being cheap and easy to build. There’s also the Possibility that the returns would be too diffuse for a detector on the missile to track beyond that 20km range, so having additional sets beyond that range wouldn’t help. Probably easier and cheaper just increase the range of a single radar. Just putting the whole set on a really big missile and making it an active radar homing system might make sense with an array of sets providing warning and an initial vector, and the missile guiding it’s self in, but again, now your missile is the cost of at least one set per launch.
Not sure what limits the range on this set, but they mention a wave guide improving it, which makes me think it’s just a power limitation on the emitter or limited sensitivity on the receiver.
Thats the idea behind datalink
Not even close, both of these projects are wildly deficient for that kind of use and the effort required to solve those deficiencies would at least 10x if not 20x the cost.
That doesn't mean they are useless, I can definitely see some eyebrow raising asymmetric possibilities.
If you're seriously interested in this DIY Radar System I strongly suggest you grab a full copy from Github and put it on local storage as I doubt it's going to remain up for long.