ARLA/CLUSTER: Descarga solar escuta-se em 20,9 e 22,6 MHz

[Carlos Fonseca]

Este fim de semana nos 12m (24mhz) foi um "forrobodó" o dia todo!

73's de CT1GFQ
Carlos Fonseca
SKCC #466C http://www.skccgroup.com/
REP #1406 http://www.rep.pt
No dia 05/05/2014 13:16, "João Costa &gt; CT1FBF" <ct1fbf  gmail.com>
escreveu:

> Anvil Screamer: corona discharge pulses - spectrograph
>
> Thomas Ashcraft has released a recording made at his shortwave radio
> observatory of a corona discharge on 20.9 and 22.6 MHz
>
> The Vimeo description reads:
>
> This afternoon a developing electrical storm snuck up on my radio
> observatory without much preceding lightning or sonic thunder to warn
> me. I was inside, deep in my head working on a project when I started
> to hear the howl of an "anvil screamer" through two of my radios at
> 22.6 MHz and 20.9 MHz.
>
> I have heard this phenomenon before in conjunction with an approaching
> storm before so I sprang into action and disengaged my antennas
> expecting a lightning strike to happen at any moment. It is possible I
> was directly under a highly charged anvil part of a lightning cloud.
>
> This so-called "anvil screamer" was caused by a corona discharge on my
> antennas as small discharges occurred off of pointy objects ( grasses
> and cactus spines ) in the vicinity of the antennas due to a charge
> differential between the ground and the air. I did not get it together
> in time to look outside but my antennas might have been glowing violet
> blue in this moment with St. Elmo's Fire.
>
> I was able to capture a one minute forty second radio recording which
> builds in intensity and frequency and then stops abruptly as I got my
> system unplugged and disconnected.
>
> Luckily, no close lightning bolt struck, as I thought I was about to
> "meet my maker" so to speak. It was a close call in any case.
>
> Listen to the recording at
> http://vimeo.com/93097274
>
>
> _______________________________________________
> CLUSTER mailing list
> CLUSTER  radio-amador.net
> http://radio-amador.net/cgi-bin/mailman/listinfo/cluster
>
>
-------------- próxima parte ----------
Um anexo em HTML foi limpo...
URL: http://radio-amador.net/pipermail/cluster/attachments/20140505/01959a69/attachment.html