Timeline for Can aviation HF radios receive while transmitting?
Current License: CC BY-SA 3.0
14 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Mar 6, 2019 at 1:22 | comment | added | pericynthion | No. In my experience often they can't even receive while not transmitting. | |
| Oct 6, 2016 at 11:02 | comment | added | AndrejaKo | @resident_heretic Yeah, of course there are directional antennas and later or the whole beamforming story etc. But in this case, we've had communication between one ground operator and one airplane. Also, directional antenns don't seem to be very spatially selective on HF. I can quite often hear in, north Europe, stations beaming to Africa or Middle East. | |
| Oct 6, 2016 at 7:37 | comment | added | Old_Fossil | @AndrejaKo: There could be a way to hear multiple transmissions on the same frequency., Using directional antennas to transmit to different aircraft coming from different directions. The radiation pattern would would determine who hears what. | |
| Sep 24, 2016 at 12:57 | comment | added | AndrejaKo | @resident_heretic Well the thing is, I regularly hear Shanwick, but in this case, I was actually listening for some time and am quite sure I heard Gander indetification numerous times. I also remember that it was interesitng for me, since I can't hear Gander regularly. The only possibility I see is that, when I was making note of the frequency, I wrote down Shanwick's frequency by mistake. It's been almost a year since I've listened, so I do not remember exactly when or how I made the note of the frequency. | |
| Sep 24, 2016 at 8:37 | comment | added | Old_Fossil | If they are operating in simplex mode-No. However 5616 KHz is also used by not Gander but New York, Santa Maria, Shanwick, etc. It is possible that you were listening to another ATC. | |
| Oct 25, 2015 at 11:25 | comment | added | AndrejaKo | @mins I myself do not believe that that was the case. Usually, when multiple reflections of similar strength are received, on the receiver, the sound that's made sounds a bit like an echo. I didn't hear any echos, so from this I can conclude that my reception was coming from only one major reflected component of the signal. So if the cause was delay, it would be more-or-less constant within the small time-frame of several relations. So if I was having a delay, it would affect other relations as well, but that didn't happen. | |
| Oct 25, 2015 at 6:03 | history | tweeted | twitter.com/StackAviation/status/658161848244707328 | ||
| Oct 25, 2015 at 3:51 | comment | added | mins | Could that be the effect of the different propagation times to your location? HF travels by reflexions between the ground and the ionosphere on daytime. I wonder if you didn't hear an apparent overlap that didn't exist. | |
| Oct 19, 2015 at 19:32 | vote | accept | AndrejaKo | ||
| Oct 18, 2015 at 7:17 | comment | added | Peter Kämpf | I guess Hanlon's Razor applies here. | |
| Oct 18, 2015 at 2:36 | answer | added | aeroalias | timeline score: 4 | |
| Oct 18, 2015 at 2:02 | comment | added | Ralph J♦ | Inept operator, perhaps? | |
| Oct 18, 2015 at 0:25 | review | First posts | |||
| Oct 18, 2015 at 0:28 | |||||
| Oct 18, 2015 at 0:20 | history | asked | AndrejaKo | CC BY-SA 3.0 |