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Big thanks for the great video. Could you please introduce some good reference for "stretch processing"? I did not actually understand what is stretch processing

What an OG!!!

Good explanations, but I don't find any interest in detecting things I can see directly with my own eyes ! View is the best technology ever developped !

can we connect that radar and zammer? auto track drone and shoot emp to drone to kill?

Turbine and propeller modulations are part of the radar target processing on Air Defense Radars. You can see Russian Bear bomber propellers at max Doppler range. The bomber itself needs to get closer before the Doppler tracker locks-on to it. But we also had pulse radar that saw the bombers if they were high enough (Beyond the Horizon) at twice the range of the Doppler radar.

The Pulse Doppler radars I worked on all had the closing velocities on the right of the clutter notch, and opening on the left.

Many thanks! So interresting. Theorical papers are easy to found. It is easy to build basics doppler low cost radar. Here, I discover the power of array and chirp in doppler.

Looking forward to the next video.

So cool. I wish i could afford the parts to build my own

This may sound like an insane question, but is there radar sensitive enough to both detect a mosquito at relatively near distance, but positively identify it due to counting the microdoppler of its wings beating at a certain hertz?

Got hooked. Will watch the whole series now.

Yeah. Let's low key help Ruzzians right now. Great job... -.-

Best series on practical radar fundamentals around. Can't wait for season 2! It has been super helpful to take the Phaser from a bit of complex hardware to useful experimentation.

Can Starlink hardware be converted/hacked into a radar? After all, it is already a 2d scanning phase array... maybe it can be hacked into working at different frequency than original Starlink system?

10 seconds and I subscribed.

Looking forward to your phased array series, it is probably one of the coolest applications of signal processing, RF electronics and EM theory I know of!

I love this wow. The algorithm works in my favor. Sub.

thanks for your time and effort

Only read the title. 1st thought, "DON'T TELL THE RUSSIANS!"

as someone who worked on radar for a short while, i am blown away with this project. i would be shocked if you're not snapped up by some defence contractor. or maybe that's how you got your knowledge? hehe

I just discovered this channel, instantly subscribed. Thank you for making these educational videos, I now have a bit of a backlog to work through.

This series is awesome!

It's too expensive. Why can't I use a starlink for this?

Great series it videos. I built a few FMCW back in grad school (1995) and we used YIG oscillators to get the bandwidth. Amazing that can be done in a couple of chip these days.

Great video!

This is really amazing! Thanks a lot!

Great series! Is this phased array radar limited to 40 meters range? What is needed to detect range and speed of an object at 400 meters or more?

does the same concept apply to terrahertz imaging only much higher freq?

Can I synchronize a few cheap SDRs with some external clock, to extend the antenna array without selling a kidney?

Mimicking is easy. What books should I read, to properly un derstand that, and be able to tweak and adjust as I want? Antennas, amplifiers, dsp,...

Can't wait for the beamforming application!!

So you have nine bins on the Fast Time axis, separated by the sampling rate of the data convertor, something like microseconds. Is there one ADC reading in each bin? 8 bins is enough for an FFT, but do you really have a lot more?

Is it possible to use the radar to calculate the rotation speed of the propellers of the drone?

Well coming from several years in Turkey we used A variable-focus feed horn that provided a wide beam for detection and a narrow beamwidth for tracking. . . Pulse compression was used to improve both the gain and resolution of the 35-foot (11 m) dish antenna. Steering was mechanical; the FPS-79 had a range of 24,000 miles (39,000 km). The radar site closed in 1997, but We on base were referred to as "Space Trackers" Loved the Tech back then. You have done an excellent job of explaining and back then We would have never envisioned what you made possible... WELL DONE man! Looking forward to more. en.wikipedia.org/wiki/United_States_Space_Surveillance_Network#AN/FPS-79

Okay but your not measuring the actual Dopplershift right? Or am I missing something. And if that's true why is it then still called Doppler when it would be more accurate to say radial velocity.

Love you videos. Thanks for sharing!

fantastic explanation

thanks very very cool work is that the range ? 40m for a bigger target say 10x bigger, of size 200cm, how far out should you be able to see it on top of the noise, and will the speed of the target effect its radar profile ?

Very very interesting!

it's pretty cool that a little diy radar is sensitive enough to detect a drone by the micro-doppler reflections of the drone's plastic rotors

Not gonna Lie. _This is actually fascinating_ a really good, real life example of tech , physics & math in *Practicality*

I'm very you are doing well with this extremely niche kind of subject.

This is begging for neural network processing in order to identify signatures.

Amazing thanks!

how many ukrainians are watching this

Love these videos. I've never had the chance to study or play with radar, but having a background in electronics and maths it's still super easy to follow.

Ah, a fellow Terre Haute escapee. Congrats! I worked at ICTT in the 80s, and was on air at WMHD a few weeks.

Excellent work

Just found your channel and I love the easily understandable, but still very technical style of explanation. This is super cool knowledge that I love having, thank you for teaching!