venerdì 20 marzo 2015

Eclisse di sole

Non è molto pertinente con la radio, ma son sempre cose interessanti...
Un ringraziamento a mio fratello per la pazienza di fare tutte queste fotografie e metterle insieme.
Foto scattate in provincia di Bergamo tra una nube e l'altra.

E.Pelicioli


3 commenti:

tecnatron ha detto...

Belle. Ottima sequenza.
Chi ha provato a rilevare eventuali effetti sulle comunicazioni radio?
Achille De Santis- tecnatronATgmail.com

Claudio Re ha detto...

TRatto dal gruppo Perseus su Yahoo :

MW file from solar eclipse
Fri Mar 20, 2015 4:54 am (PDT) . Posted by:
peeraxel
During the 83% solar eclipse here in Handewitt in north Germany MW conditions raised only over a few minutes between about 9,30 - 10.00 UTC. The band was clearer than usual becuase in the first place stations only from the UK and Iceland got stronger, France only a little, but no interference from the south and east.
By the way here in Handewitt there was nothing to stare at- just clouds all over.

This is a file with 8 seconds MW/LW (2 MS/s / 61 MB) at 09.44 UTC.

http://www.4shared.com/music/urOg04N7ce/150320_Handewitt_Solar_Eclipse.html

Claudio Re reclaudio@alma.it

Claudio Re ha detto...

Dal Gruppo VLF su Yahoo : Claudio Re reclaudio@alma.it

Solar Eclipse at Kiel, North Germany
Fri Mar 20, 2015 6:38 am (PDT) . Posted by:
"pws"
Hi,

Clear effects at 37.5 and 57.4 kHz; both located on
Iceland, 2119 km/314° from Kiel 54°22'34"N 10°08'17"E.

See:
http://lf-radio.de/cgi-bin/test/plot_channel.cgi?date=15-03-20&freq=37.5KHz
http://lf-radio.de/cgi-bin/test/plot_channel.cgi?date=15-03-20&freq=57.4KHz
Spectrograms
Yesterday: http://lf-radio.de/cgi-bin/test/show_wf.cgi?date=15-03-19
Today: http://lf-radio.de/cgi-bin/test/show_wf.cgi?date=15-03-20

Equipment:
-15cm ferrite loop stick at ground, TL592 amp.
-Raspberry Pi B+, Cirrus sound card
-Debian running from Memory stick
-~90 FFTs/sec., averaged to 1 min.
-Upload via mini-router and 3G USB-stick
-All from Battery
-
No sun visible here due to dense fog (*.*)

Peter, 54N 10E
Reply to sender . Reply to group . Reply via Web Post . All Messages (2) . Top ^
1b
Re: Solar Eclipse at Kiel, North Germany
Fri Mar 20, 2015 8:07 am (PDT) . Posted by:
"Paul"

At least NRK didn't switch off today like it did yesterday.

Here at Todmorden, no significant amplitude variation of
37.5 but it did show a very nice large phase change - shifted
about a third of the way back to the nighttime phase. Peak phase
shift (about 80 degrees lag) reached at 09:36:20, dwelled there
until 09:39:00 then began to recover.

Wish I'd known about 57.4 I could have monitored that one too.

--
Paul Nicholson
--
Reply to sender . Reply to group . Reply via Web Post . All Messages (2) . Top ^
2a
Solar Eclipse at Bielefeld, Northwest Germany
Fri Mar 20, 2015 7:41 am (PDT) . Posted by:
dl4yhf
Greetings all,

Graphic plot of fieldstrengths of various VLF transmitters during the eclipse:

https://xa.yimg.com/df/VLF_Group/Eclipse_DL4YHF_2015_03_20.jpg?token=c9E2caUfkpSeC61wrU7XL6jRWCAO5rsoVW9F6HCzmYk2l-z9CNBgC0lETXrQDJcPLJqF7lsKR-LRkTeKDKg_ldjdtDVteJZJt4kgOfRSrIjK6RO_ytlXi4L4R_OdRx5L4blREcopcNVkl9SgGJr5U6FuV_k6wN_Exd-AoZTr&type=download

(not sure about the above terribly-looking address.. it's in the group's FILES folder).

A machine-readable logfile (in "Ukaranet format") is in the same directory.

Cheers,
Wolf .
Reply to sender . Reply to group . Reply via Web Post . All Messages (4) . Top ^
2b

Posta un commento

I commenti sono aperti a tutti e sono soggetti insindacabilmente a moderazione.
NON SARANNO PUBBLICATI COMMENTI SE PRIVI DI NOME E COGNOME ED EMAIL.
IL SOLO NOMINATIVO RADIOAMATORIALE NON SOSTITUISCE IL NOME E COGNOME RICHIESTO.
Grazie.

Nota. Solo i membri di questo blog possono postare un commento.