Very good video! My first introduction to short wave skip as he called it was a truck driver I worked with back in 1980. He would look forward to different seasons and weather patterns that would yield the best radio signals. He told me of many conversations that involved people from thousands of miles away. He had an antenna mounted on top of a windmill tower. As a young man I was blown away. He was in the navy and served in the South Pacific where he learned about signal travel. Back then we didn’t have a lot of tech advancements and hearing a man talk to the Asian continent from Alabama was really big stuff.
Nice job presenting some concepts of a most difficult topic. Not only is the ionosphere a three dimensional thing, but its "construction" changes with time; time of day, month, year, and sunspot cycle. Looking forward to your other videos on the subject.
Thank you so much 😊 im from Persia and recently I became a shortwave listener.because our A.hole government and its bs tv and news we watch satellite tv but some times they put noise on satellite TVs so people can’t know what’s going on in world.so i use sw Radio to get informed.
..when at night & daytime, the conditions of the earth atmosphere is differ in (temperature,pressure etc.), probably it is the signals propogation become more clearer etc. ( Its dynamics, mechanics etc.)
Thank you so much. I've been listening to shortwave radio since I was 7 or 8 and now I understand why all this happens this way. I just have a couple questions: - How does the E-Layer behaves? - Is there anything such as a "propagation index" or the like? Between 02:28 and 03:01you explained that, excepcionally, lower frequencies could by heard locally and you said something like "...in a very short skip the D-Layer will propagate 6-0, 7-0. Is that "6-0, 7-0" a way to measure propagation? Best wishes from Spain.
propogating radio signal from the earth and bumping back from the ionosphere to the earth (other part & probably other continent) ..because radio signal is an E.M.F (Electromagnetic Field)@it does have negative ( - ) charges and bumped back to the earth by the (-) charged of ion at the ionosphere.. ..so, its navaids structure should be???😃
+Southern Illinoisan : Because of the D Layer that disappears from the ionosphere, and the E, F1 and F2 layers merge into just an F layer at night and propagates the MF and HF frequencies from 300 kHz to 15 MHz. Some online sources say that the LF 10 kHz to 300 kHz frequencies propagate via ground wave along the curvature of the Earth across wet soil and salt water and it also proapagates a night via the a weak D layer that is still remaining. When there is a HF black out, the VLF to frequencies up in the 500 kHz range propagate freely, because the D layer is strong at night which is good for low frequencies, because the D layer acts like a VLF-MF wave guide, but the HF frequencies loose it's wave guide at night, because the F layer is disrupted. The only happens when there is a severe geomagnetic storm and HF blackout. Also the propagations for AM focuses on the distant stations at night during this event and shifts the reception all down to the southern hemesphere to pick up stations from Mexico, Cuba, and South American countries, and other countries in the southern hemesphere. Another reason why, is that we have clear channel AM stations, AM stations that operate at 1 kW to 50 kW that propagate via sky wave at night and are heard over 200 to 1200 miles away depending on the AM broadcast conditons. The FCC wants to change this by making the day time stations operate 24 hours a day and run on the same daytime power to help stations provide local coverage of the AM broadcasts.
I don't like DAB radio because the reception is poorer than old analogue radio reception. Satelitte radio has an abundance of radio stations. I do however like the older Shortwave radio reception where I can scan and search from what is bounced from the Ionosphere. Shortvave magasine is an ideal scource to what is available, depending where you live, on what stations can be heard. I use a Sony AN1 active antenna with a Grundig Satelitte.
@Radio Operator Portable yeerh the retard flerf's don't know What EME is Then if they know speed of light .. they culd mesur distance til moon by ping.. I used 4 Flexa Yagi with combiner at VHF And 4 UHF ... To EME...
The Problem with the skipwave propagation theory is it assumes a spherical Earth, which is not scientific fact it's only a theory. For anything to pass the scientific method, it must duplicatable by everyone and the results must be the same for every experimenter. We don't have that for a globe Earth. Consider a round Earth breaks the laws of Physics. Water at the equator would have to flow sideways and at the bottom of the sphere water would have to flow Up. Thats what the theory says but because it cannot be duplicated in a lab it fails to pass the scientific method. You also have to Show in a lab experiment how radio waves can bounce off an ionosphere which you cannot duplicate either, hence that fails the scientific method.
Very funny for a moment I thought you were been serious LOL as some flat earthers could actually come out with some thing as ridicules as this . I mean earths a sphere a fact why would it have top and bottom FFS
Very good video! My first introduction to short wave skip as he called it was a truck driver I worked with back in 1980. He would look forward to different seasons and weather patterns that would yield the best radio signals. He told me of many conversations that involved people from thousands of miles away. He had an antenna mounted on top of a windmill tower. As a young man I was blown away. He was in the navy and served in the South Pacific where he learned about signal travel. Back then we didn’t have a lot of tech advancements and hearing a man talk to the Asian continent from Alabama was really big stuff.
Great video Gilles really helpful thanks for making and posting 📻👍
Nice job presenting some concepts of a most difficult topic. Not only is the ionosphere a three dimensional thing, but its "construction" changes with time; time of day, month, year, and sunspot cycle. Looking forward to your other videos on the subject.
Thank you so much... Very informative (refresher) video. Much appreciated. 😊👍
Just starting out; REALLY HELPFUL!
New to SW listening, excellent video. I will need to watch this several times to absorb all the information your presented.
Tres Bien Gilles! Very well explained.
Very nice, complete explanation, thank you.
Thank you so much 😊 im from Persia and recently I became a shortwave listener.because our A.hole government and its bs tv and news we watch satellite tv but some times they put noise on satellite TVs so people can’t know what’s going on in world.so i use sw Radio to get informed.
Great informative video thanks for posting I know it a few years old now.
Super late to the party.
Loving your videos.
Plenty of explanation & ease of understanding.
Thank you 🙏🏻
Well done! You’re an excellent instructor. A professional and enjoyable class.... Thanks for sharing your pearls of knowledge. KC1ANR Boston
Yes. Fantastic explanation--ThanX !
Love your videos thank you
Excellent info! Thank you
..when at night & daytime, the conditions of the earth atmosphere is differ in (temperature,pressure etc.), probably it is the signals propogation become more clearer etc. ( Its dynamics, mechanics etc.)
Excellent. Thanks.
Very good explanation 👌👌👌
Good video!
Thanks 😎👍
Thank you so much. I've been listening to shortwave radio since I was 7 or 8 and now I understand why all this happens this way. I just have a couple questions:
- How does the E-Layer behaves?
- Is there anything such as a "propagation index" or the like? Between 02:28 and 03:01you explained that, excepcionally, lower frequencies could by heard locally and you said something like "...in a very short skip the D-Layer will propagate 6-0, 7-0. Is that "6-0, 7-0" a way to measure propagation?
Best wishes from Spain.
Nice video, mostly you talk about propagation from E to W but what about N to S any tips and tricks there?
@Vibe Master done that got the T-shirt. Kids are doing great. Enjoy.
propogating radio signal from the earth and bumping back from the ionosphere to the earth (other part & probably other continent)
..because radio signal is an E.M.F (Electromagnetic Field)@it does have negative ( - ) charges and bumped back to the earth by the (-) charged of ion at the ionosphere..
..so, its navaids structure should be???😃
Thank you!
Could you come up with a video about LW and MW (AM) day and night propagation?
+Southern Illinoisan : Because of the D Layer that disappears from the ionosphere, and the E, F1 and F2 layers merge into just an F layer at night and propagates the MF and HF frequencies from 300 kHz to 15 MHz. Some online sources say that the LF 10 kHz to 300 kHz frequencies propagate via ground wave along the curvature of the Earth across wet soil and salt water and it also proapagates a night via the a weak D layer that is still remaining. When there is a HF black out, the VLF to frequencies up in the 500 kHz range propagate freely, because the D layer is strong at night which is good for low frequencies, because the D layer acts like a VLF-MF wave guide, but the HF frequencies loose it's wave guide at night, because the F layer is disrupted. The only happens when there is a severe geomagnetic storm and HF blackout. Also the propagations for AM focuses on the distant stations at night during this event and shifts the reception all down to the southern hemesphere to pick up stations from Mexico, Cuba, and South American countries, and other countries in the southern hemesphere.
Another reason why, is that we have clear channel AM stations, AM stations that operate at 1 kW to 50 kW that propagate via sky wave at night and are heard over 200 to 1200 miles away depending on the AM broadcast conditons. The FCC wants to change this by making the day time stations operate 24 hours a day and run on the same daytime power to help stations provide local coverage of the AM broadcasts.
..light (u.v) or other particles & forces might intefere the signals that been propogate..😆
Why is it called shortwave? If it is Blogger than The medium..
I don't like DAB radio because the reception is poorer than old analogue radio reception. Satelitte radio has an abundance of radio stations. I do however like the older Shortwave radio reception where I can scan and search from what is bounced from the Ionosphere. Shortvave magasine is an ideal scource to what is available, depending where you live, on what stations can be heard. I use a Sony AN1 active antenna with a Grundig Satelitte.
Does this relate to WiFi ?
grey line
Clear as mud.
the F-layer sure does look like the firmament...is that why it is called the F-layer? ;-)
Scott Voigt I agree.
If F layer WAS the Dome.. wher does IT go at night .. in the garage perhaps
Same time Earth mysterisley goe's Flat
@Radio Operator Portable yeerh the retard flerf's don't know What EME is
Then if they know speed of light .. they culd mesur distance til moon by ping..
I used 4 Flexa Yagi with combiner at VHF And 4 UHF ... To EME...
Radiowaves cannot be bent around its curvature = Earth is flat
Shortwave radio bounce via the ionosphere, and yes very low frequencies quand bend around curvature
@@OfficialSWLchannel stupid guy, i have a Government - Document....... ( not bent ).........🤣🤣........
dat
The Problem with the skipwave propagation theory is it assumes a spherical Earth, which is not scientific fact it's only a theory. For anything to pass the scientific method, it must duplicatable by everyone and the results must be the same for every experimenter. We don't have that for a globe Earth. Consider a round Earth breaks the laws of Physics. Water at the equator would have to flow sideways and at the bottom of the sphere water would have to flow Up. Thats what the theory says but because it cannot be duplicated in a lab it fails to pass the scientific method. You also have to Show in a lab experiment how radio waves can bounce off an ionosphere which you cannot duplicate either, hence that fails the scientific method.
Man I needed a good laugh today, thank you!
Yeah a flerf .. aaaaaaahahahahahaaahahahahhh big mistanke
HAMs do know the EARTH is A GLOBE so G F Y S ... FLAT ERTHER
Very funny for a moment I thought you were been serious LOL as some flat earthers could actually come out with some thing as ridicules as this . I mean earths a sphere a fact why would it have top and bottom FFS
@@kennethschultz6465 oh, the next Nasa - Troll.
Couldn't watch this video with the way you talk. I can't believe someone said you were a good instructor christ man.