Keyboard Shortcuts
ctrl + shift + ? :
Show all keyboard shortcuts
ctrl + g :
Navigate to a group
ctrl + shift + f :
Find
ctrl + / :
Quick actions
esc to dismiss
Likes
- Radio-Jove
- Messages
Search
Re: Solar 12/01/2024 Easley, South Carolina
开云体育Sweet !
On 12/2/24 19:51, AOL via groups.io wrote:
|
IoA' 12/02/2024 Easley, South Carolina
Good evening: ? ? ? ? ?Suspected IoA' from early this morning. Seems to be all N events at my location. I welcome comments. ? ? ?John?
12022024.PNG
120220242.PNG
JupiterIoA'12022024Labeled1B.PNG
JupiterIoA'12022024Labeled2B.PNG
JupiterIoA'12022024Labeled3B.PNG
JupiterIoA'12022024Labeled4B.PNG
|
Re: 01 Dec 2024 non-Io-A
Yes, but consider that only the 2-element array saw it. That array's beam is fixed at zenith.
toggle quoted message
Show quoted text
The 8-element array saw nothing of it because that larger array has a much smaller beam fixed at azimuth 180°. Its beam elevation is changed every half year or so to match Jupiter's transit elevation. Sometimes a wide, low-directivity beam is a good thing! -- Dave On 12/2/24 12:31, Sabine Cremer wrote:
This is the same event that I recorded and it shows up amazingly well in your |
Re: 01 Dec 2024 Non-Io-A
Claudio Alberto Pérez Celeiro
Es precioso de Nancay. Claudio El lun, 2 dic 2024 16:36, Dave Typinski via <davetyp=[email protected]> escribió: Hi Sabine, |
Nancay trip report
For those interested in some of the the details of the Nancay Radio Astronomy Field Station, here is a trip report from my visit there in 2016.
Hope you find it interesting! ,%20Typinski%20%20(SUG,%202016).pdf Here is a photo gallery without explanatory text. More info can be found here: -- Dave |
Re: 01 Dec 2024 Non-Io-A
Hi Sabine,
toggle quoted message
Show quoted text
If you had 144 conical log spiral antennas spread over a hectare giving you 26 dBi directivity, you would see that too. :) Here are some pictures I took at Nancay in 2016: -- Dave On 12/2/24 05:51, Sabine Cremer wrote:
A very blurry view of non-Io-A. I think the nice old lady next door had her fan |
ANT. VERTICAL 20 MHz.
Claudio Alberto Pérez Celeiro
---------- Forwarded message --------- De: Claudio Alberto Pérez Celeiro via <ecosanacion.interdimensional=[email protected]> Date: lun, 2 dic 2024 11:15 Subject: Re: [Radio JOVE] ANT. VERTICAL 20 MHz. To: <[email protected]> Estimado David.
Quizá por tu comentario acertado sobre las antenas verticales, también compartir que como ingeniero en radio desde hace 50 a?os, he podido investigar y practicar, que muchos de los conceptos y medidas técnicas, tanto en los circuitos electrónicos de radio, amplificación, acoplamiento de impedancias, Balun y un largo etc. no siempre (por no decir casi siempre) corresponden con la realidad práctica en el terreno de aplicación.? He podido dise?ar, construir y comprobar, que la realidad salta con amplio margen los protocolos teóricos.? Esto es, por lo que desde mi experiencia he hecho comunicaciones, Radioastronom?a, etc. con grandes resultados, que saltan los conceptos de protocolo técnico. Esto me ha dado siempre grandes alegrías, pues en la Ciencia,? todo es posible de una manera agradablemente? sorprendente...? Sin más y deseando que tengáis felices e interesantes recepciones, recibid mis más sinceros deseos de digna investigación. Un abrazo. Claudio? EA4AND? |
01 Dec 2024 Non-Io-A
A very blurry view of non-Io-A. I think the nice old lady next door had her fan heater on in her bedroom.
What surprises me is that I only saw the initial phase of a Jovian breeze that Nancay recorded in epic broadness. Jupiter was at negative hour angles at every point of the event, so one would expect reception conditions to steadily improve.
?
Sabine
--
Germany Standard time: UTC +1 hour |
Re: ANT. VERTICAL 20 MHz.
Claudio Alberto Pérez Celeiro
Estimado David. Quizá por tu comentario acertado sobre las antenas verticales, también compartir que como ingeniero en radio desde hace 50 a?os, he podido investigar y practicar, que muchos de los conceptos y medidas técnicas, tanto en los circuitos electrónicos de radio, amplificación, acoplamiento de impedancias, Balun y un largo etc. no siempre (por no decir casi siempre) corresponden con la realidad práctica en el terreno de aplicación.? He podido dise?ar, construir y comprobar, que la realidad salta con amplio margen los protocolos teóricos.? Esto es, por lo que desde mi experiencia he hecho comunicaciones, Radioastronom?a, etc. con grandes resultados, que saltan los conceptos de protocolo técnico. Esto me ha dado siempre grandes alegrías, pues en la Ciencia,? todo es posible de una manera agradablemente? sorprendente...? Sin más y deseando que tengáis felices e interesantes recepciones, recibid mis más sinceros deseos de digna investigación. Un abrazo. Claudio? EA4AND? |
Re: Recepción audio. Io-Jupiter
Claudio, I am afraid that if there is any Jupiter in the audio it is hidden by the MP3 compression algorithm.? If you have an original recording in an uncompressed format (WAV format), we might be able to hear it.Jim On Fri, Nov 29, 2024 at 1:10?PM Claudio Alberto Pérez Celeiro via <ecosanacion.interdimensional=[email protected]> wrote:
|
Re: ANT. VERTICAL 20 MHz.
Claudio Alberto Pérez Celeiro
Esto es cierto teóricamente David. Sin embargo la utilizo en la mayoría de mis recepciones de Júpiter, con una muy buena respuesta.? Depende siempre de cómo de despejada esté la antena en su entorno. En mi caso está funcionando bien.? Por eso os remití la otra antena Dipolo de triple hilo,? que rinde con una muy buena ganancia, para el que no pueda usar el Array y tenga espacio limitado.? --------- This is theoretically true David. However I use it for most of my Jupiter receptions, with a very good response. It always depends on how clear the antenna is in its surroundings. In my case it is working well. That is why I sent you the other triple wire dipole antenna, which performs with a very good gain, for those who cannot use the Array and have limited space. Claudio EA4AND? |
Re: Antenna alternatives for more constrained space and no trees/ground access
Daniel, It is possible to see/hear Jupiter on a single dipole, though you will not probably see the fainter emissions.? I am doing it right now (as I write this) at an extremely quiet location (only at night). I am seeing Jupiter Io-A mode emissions as I write this. Given you have??a wood structure with no metal roof, I think you should try the dipole in the attic.? You will need to have a quiet location, including your household RFI makers like TV or thermostats.? If your attic is wide enough you might put up a dual dipole.? I will be adding that extra 3 dB that comes with the second dipole before long.? It makes a big difference in hearing Jupiter Jim On Sat, Nov 30, 2024 at 12:29?PM Danielhandlin via <Danielhandlin=[email protected]> wrote:
|
Re: Questions about Spectograph
Alfi, You can look at wider swaths of the observation at a time.? After loading a chart change the value in the small box on the upper right that is labeled X-factor.? If the X-Factor is set to 1 then the chart is at the highest time resolution.? Changing it to some higher number will cause the displayed area to be greater.? If your chart now take covers 5 minutes at X factor 1, it will cover 1 hour with it set to 12.?The manual for all operations in Radio-Sky Spectrograph can be seen by pressing F1. Jim On Sun, Dec 1, 2024 at 8:42?AM Alfi Hasan via <alfihasan78=[email protected]> wrote:
|
Re: Solar smudge? 1 DEC 2024
开云体育Hi Duane and John,
Saw the same weak solar emission here. -- Dave On 12/1/24 20:37, AOL via groups.io wrote: Duane: |
Re: Ummm 1 DEC 2024
开云体育Hi Duane,
Doubtful of cosmic origin; most likely some kind of RFI.? Saw nothing here at the time. -- Dave On 12/1/24 19:30, Duane via groups.io wrote: Observations from Grafton, WV. |
Re: ANT. VERTICAL 20 MHz.
开云体育A vertical antenna is a poor choice for Radio Jove reception.? A vertical theoretically has a null overhead, which is the opposite of what you want. And in any case a capacity hat isn't going to discriminate against local interference.? In fact, a vertical antenna is again a poor choice in general for avoiding local RFI since the bulk of local RFI tends to be vertically polarized. A vertical (capacity hat or not) is indeed a decent antenna for long distance terrestrial communications because (depending upon local ground conductivity) it has a low angle of radiation/reception.? That's not what you want for Radio Jove, however. Dave ? AB7E ? On 12/1/2024 4:36 PM, Claudio Alberto
Pérez Celeiro via groups.io wrote:
|
to navigate to use esc to dismiss