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


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3 commenti:

  1. Achille De Santis20 marzo 2015 alle ore 19:50

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

    RispondiElimina
  2. Claudio Re21 marzo 2015 alle ore 09:58

    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

    RispondiElimina
  3. Claudio Re21 marzo 2015 alle ore 11:07

    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
    --
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    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 .
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    2b

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