ไม่สามารถเล่นวิดีโอนี้
ขออภัยในความไม่สะดวก
That Funny Line Is An Ionosonde! (
ฝัง
- เผยแพร่เมื่อ 12 ส.ค. 2024
- Several Oggies have asked what the diagonal line is in the waterfall diagram displayed in Ask Dave #384. The answer? It's an ionspheric sounder--an ionosonde. A What? Watch and find out!
Subscribe: / davecasler . Ask Dave Playlist: goo.gl/inaQeB. Tip Jar: ke0og.net/tip-jar
To learn more about me, visit: www.dcasler.com/about/
Tip jar (on my website): www.dcasler.com/tip-jar/ (provides a method to use your credit card via PayPal, Also describes Patreon)
To pose an Ask Dave question: www.dcasler.com/ask-dave/ or www.ke0og.net/ask-dave/
To order the most recent and up-to-date Amateur Extra videos on a thumb drive: dcasler.com/aevids-on-stick/
Theme music is "Sour Tennessee Red," by John Deley and the 41 Players, courtesy TH-cam Music Library.
I use drawings from OpenClipArt.org, including the "walking man"
Technician training videos, see www.ke0og.net/training/
General training videos, see www.ke0og.net/general/
Amateur Extra training videos, see www.ke0og.net/extra/
List of the Ask Dave videos, see dcasler.com/ask-dave/#askdavelist
Thanks to my sweet wife, Loretta, KBØVWW, for both audio and video assistance! (Her website is www.aldea-art.com.)
My primary website: www.dcasler.com
The ham radio part of my website (direct link): www.ke0og.net
My publishing website: www.mtsneffelspress.com, where you can find my fantasy and science fiction books, as well as some local history books I publish for the Ridgway Railroad Museum and the Ouray County Historical Society
My Amazon author page, which lists my print and Kindle books: www.amazon.com/-/e/B00471I0Q4.
I'm often asked what equipment I use to create the videos. The devices include the Panasonic DMC-G7 camera, Panasonic HDC-TM90 video camera, GoPro Hero2 HD camera, Tascam DR-05 audio recorder, Audio-Technica ATR-3350 lapel microphone, Sony Cyber-shot DSC-W560 digital camera, the Kodak Zi-8 video camera, my iPhone 5S. Software used: CyberLink PowerDirector 17 on an HP Gaming Pavilion, also using Smoothdraw 4.0.5.0, FastStone Image Viewer 5.3, FastStone Capture 8.0, Audacity 2.1.1, LibreOffice 5.0.4.2, and Ink2Go 1.7.2. You can see how my studio is set up by viewing • Tips for Making Instru... .
Twitter: @dcasler
![CAMPปลิ้น | EP.79[2/2] มานั่งฮ้านกินข้าวนำกันเด้ออ้ายยย](http://i.ytimg.com/vi/pHIS_Sdy8P8/mqdefault.jpg)
That Antenna looks like a Stratus 1S / 2S and 3 - ADS-B traffic and weather data is broadcast on 978 MHz and 1090 MHz from ground base stations. Nice tool to have in an aircraft. KG5LFI Thanks for your help and great videos. I passed my extra with your help.
Hey Dave. Very nice video. I read that it was E.V. Appleton & M.A.F. Barnett from the UK and G. Breit & M.A. Tuve from the USA that studied the reflection measurements in 1925. It was Appleton who named the "E" layer to refer to the downward traveling electric vector. The next higher layer was named "F" since it followed the letter "E". When later measurements found a lower layer it was assigned the letter "D", so as to keep them in altitude order. Layers lower than "D" were never found; therefore, the letters "A", "B", & "C" went unused (Ref. Space Physics: An Introduction, Russell, C.T.). 73!
Hi Dave. I believe that is an antenna with the extension from a Monroy ATD-200. I have one and it works ok but nothing like what we have now with ads-b. The company sold a ton of them until the owners had a falling out. They parted ways and the company and its products went away.
Hi Dave, I'm working at Casey Station in Antarctica. We have an Ionosonde installed here and it definitely makes operating a radio difficult. Interesting to see this video on how it works
73
VK0PD
Now I'm wondering how different the ionosphere is at the poles?
Super cool! Thanks Dave!
That antenna looks like an ADS-B antenna?
I have seen that in my waterfall a few time and thought it were interferes. Now I know what it was.
Best explanation of Ionosondes I have seen, thanks! 73
Excellent information. Thanks Dave
This was a very interesting video. Thanks Dave.
Outstanding presentation, Dave. I learned a lot. More please! 73
Once again I thank you for sharing your wealth of knowledge Dave. thank you very much
Superb explanation, thank you!
Thank you Dave for explaining this phenomenon. I've been wondering what those were for quite some time and living near a military site just assumed they were playing with their radar.
Great stuff as usual Dave. Thanks !
Thank god for this follow up. I have seen it on my 7300 and when you mentioned it I looked it up but still couldn’t understand. Thanks for the follow up! By the way, the antenna may have been used for an external gps for adsb such as stratus gps and adsb receiver.
In my area I’ve noticed on 80 meters that nvis propagation basically goes away when the sun sets, but we get better dx performance. I dont know how normal that is for this area or anywhere else since I’ve only been a ham for a couple years, but I’ve never heard anyone mention anything about it.
When the sun sets, the ionization of the F-layer(s) decreases. When the electron density becomes too low, all energy transmitted vertically is sent in space instead of being "reflected". For NVIS, your transmit frequency must stay below the foF2 frequency (see top left of Digisonde image). However, signals transmitted at a lower angle are still refracted and you can see that at the lines below for D[km] vs MUF[MHz]. Now at the same time when the sun sets, the absorption in the D-layer decreases, which reduces the attenuation for signals to and from the F-layer and because of that, the signals further away that are still refracted in the F-layer, become stronger.
And I always thought it was all those people around town with NanoVNAs doing scans on their antennas. It looks exactly the same when I am monitoring with my SDR receiver and I flip the Nano on for antenna testing.
Thank you for doing this video! I have had my license since 2019 and have wondered what those actually were.
Great info, more about that circular antenna?
1:06 - Actually, that is a continuous chirp, not a series of discrete emissions. Another name for an ionosonde is a "chirpsounder", and it transmits continuously while smoothly increasing its frequency over time. It only looks like a dotted line on the waterfall because the temporal resolution is not high enough.
73 VE7NDE
It's just a different operating mode; longer integrating time per frequency leads to higher resolution in certain aspects of the measurement.
73 KD2TDE
Yes the term is Doppler as the Chang of directions. go the tone changes. Ever hear a train pass? Similar to that
Another great video Dave
I hope you are doing well.
73.
It looks like an ADSB receiver antenna.
18:16 (Books in Background)
Hey Dave, I too ended up with two copies of the last HP book. I found this a strange enough coincidence to mention it in a comment.
Anyway, thank you for making all of this excellent content!
I have always wondered what that was. Thanks! Can you tell me what the interference noise is that you can first hear and see move slowly on the band scope that can disrupt the signal for a couple of seconds or so? Some times they will reverse directions or stay on one frequency on the band and move on. They are very pronounced on the waterfall as a heavy sloping line.
I have seen what looks like that same signal, in my waterfall when I turn on my 100 amp, power supply.
Hello Dave:: WOW and WOWSER!! I have seen this on my waterfall many, many times!! I wondered what it was!! Thought it was someone somewhere turning up the frequency on their transmitter with key down sort of??!! You explained it very well in depth !! Thank you for sharing your knowledge. Many many thanks, John Bellas KC2UVN with downed antenna's just three days ago with high winds that brought down my 20 and 40 meter inverted Vee's !!!!! The tree that held up both appex of the antenna's was a 70 foot or better Pine tree, which now lays down in my back door yard, house is O.K. and I am O.K. so far. Will be going for my 2nd Pfizer shot in 1.5 weeks wish me luck!! Hi Hi Hi
Thanks for your talks. Always fun and informative. I am not a radio operator myself. Way back in the early 1970s while attending Penn State for a electrical technicians degree I had an instructor.who was a Ham operator and early personal computer geek. He taught me enough to half a__ understand what you are talking about. He went on to become my father in law, Well for 5 / 6 years anyway. If I remember - he was W3GUL ( GREAT UGLY LOVER ) . Take care thanks again, I don't understand it all but I look forward to the TH-cam lecture.
Very interesting and well explained sir ! Thanks and 73 ! ON4CDJ
Thank you. An answer to my pondering. N0QFT
Thanks again . Another fact packed show. The information we seldom see covered.. I love it. KD9HWH said that.
Thank you Dave for providing a logical explanation of this phenomenon - I was worried extra-terrestrial beings may be the cause of it.
Is that an ADSB antenna?
GM Dave, my question is: can existing sdr software be modified for rcving Spread Spectrum Freq Hopping similar to those Used for military Secure Communications ? Tnx 73s de n6mmq
Well, that really could be a GPS antenna!
DEA forgot something.
what is the difference between radiosonde and ionosonde?
Dave, I'd subscribe 12k times if I could! Hi Hi! Love you brother! Hope you are feeling better and be safe on those wings!!! 73
Ohhh first to comment. Never had a blank comment section before.
Pedersen - they channels waves North to South giving additional DX ing - right ?
Vandenberg Time?
Dude, you look great! Well done and keep it up. KL7IS
The "Nobel Committee" obviously is not worried about proof, when it comes to the Peace Prize.
All along I thought the "HEAVISIDE LAYER" was just something T. S. ELLIOT (of CATS Fame!) made up!😀😁😂🤣😃😄😅😆😉😊😋😎
Obamasonde won the Nobel prize just for being elected?