HF Doppler RADAR Signal Examination

Discussion in 'Amateur Radio News' started by KA0KA, Feb 4, 2019.

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  1. W1YW

    W1YW Ham Member QRZ Page

    Dang! Looks like the Russians censored it:)!

    You can easily find it with a search.
     
  2. KA0KA

    KA0KA Ham Member QRZ Page

    Jim- This is FANTASIC and one reason I am so happy to be able to share these videos. As you can imagine, trying to find info on the majority of the signals is nearly IMPOSSIBLE and why there was no 'ID' on the video, just 'technically' what the signature was...
    I will add this to the description of the video and title accordingly when I find out more!!! I am finishing up a 100kC CODAR in the 11-14MHz range video now, should be posting shortly, then on to the strange OTH RADARs again, hard to ID. Thanks again for the ID of the Doppler too much appreciated!!!
    I did reach out to the founder of the RADAR system, I will ask him again specifically as well. All documents so far said they were CODAR?!?. I hope to stay in touch with you, maybe you can offer assistance in IDing some very odd signals I can find zero info on...
    Thanks so much!
     
    Last edited: Feb 6, 2019
  3. KA0KA

    KA0KA Ham Member QRZ Page

    I have a video of what I believe to be the new Woodpecker and it is from 9 to 19 MHz and fairly narrow, only 14 to 20kC. Still no idea what the FMCW and FMOP OTH signatures are both were 50kC and very low around 5,6,7 MHz I have not made the final edits on these videos yet, so any ideas I am open...
     
    W1YW likes this.
  4. KA0KA

    KA0KA Ham Member QRZ Page

    Thanks Chip, ya having the ability to make these videos to share I think helps everyone who is interested in such things. But as you can see here anyway, it is like a focused 'beam' of interest!!!
    Thanks again for you support, I had not really planned on publishing any of these on QRZ, but glad I did for this video anyway.
    ~Tyler
     
    W1YW likes this.
  5. KA0KA

    KA0KA Ham Member QRZ Page

    Both CODAR videos are posted, demonstrating the 25kHz and 100kHz long range and mid range sweeps, the 25kHz video has a nice CW 25kHz square wave IDer at the end, really great to capture that...
    I will be posting more on the main channel for review as well. https://www.youtube.com/channel/UCOPyqu-ly3yAWd5BQn2Sojg


     
  6. N1SZ

    N1SZ QRZ Lifetime Member #233 Platinum Subscriber Life Member QRZ Page

    Tyler,

    Glad to help.

    73,
    Jim, N1SZ
     
    KA0KA likes this.
  7. K3DCW

    K3DCW QRZ Lifetime Member #212 Volunteer Moderator Platinum Subscriber Life Member QRZ Page



    You mislabeled a US Navy ROTHR as a Long-Range CODAR (video now taken down). So, you did provide an an ID there, albeit an incorrect one.

    The "doppler radar" on 17.450 (along with two other frequencies which it is active on) can be found by simply doing a google search. Again, a basic mistake.

    The CW ID in your new long-range CODAR video is easily decoded and can be looked up to identify the power levels and locations (hint: it is 40w, not 80w).

    There actually is a LOT of information available out there if you expand your horizons beyond the amateur radio community. Google searches can be surprisingly productive if you approach them without a presumption of knowledge. My suggestion would be that if you're going to try and build an audience based upon your expertise, you at least get the little things right.
     
    WA1ZMS likes this.
  8. W1YW

    W1YW Ham Member QRZ Page

    Of course, this too is helpful.

    IMO, the rank and file reading this news piece will not have understood the full capabilities of a decent SDR radio in capturing these waveforms. ID'ing them and discussing their type is critical, and Tyler is one of the few to get the ball rolling publicly on this.

    IOW I imagine he and others are grateful for all the corrections and info on who the TX's are, and what waveforms they use.

    73
    Chip W1YW
     
    KA0KA and K3DCW like this.
  9. K3DCW

    K3DCW QRZ Lifetime Member #212 Volunteer Moderator Platinum Subscriber Life Member QRZ Page

    Yes, of course, Chip. And it is easy to forgive mistakes on the really hard stuff if you get the simple stuff right.

    To give Tyler some credit (I'm not all critical), he is using his ANAN to look both in and out of the amateur bands: something too few amateurs do,. The increasing use of panadapters opens up the possibility of erroneous speculation and misinformation for those who fail to understand what is going on outside of the 4.5MHz +/- of spectrum our hobby enjoys on HF. The more you look outside of the amateur bands, the more you realize that the amateur bands are downright "simple" compared to some of the things going on.
     
    KA0HCP, KA0KA and W1YW like this.
  10. WA1ZMS

    WA1ZMS Ham Member QRZ Page

    After reading the comments…we need to get W1YW, N1SZ, K3DCW, WC2XQG & Google to make the videos!
     

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