On Tuesday 09 August 2011 13:28, Laurence KL7UK wrote:
> Thanks Stefan - Yes interesting Flare - I changed the Alaska gains and saw
> that DHO38 popped out of the noise for 30 mins after the flare hit too -
> looking at the paths you can "mostly" see the ones in daylight and thus
> "mostly" affected, but NWC was a surprise as its off the side of the beam.
> Need to review the captures more, but Eu paths were and have been
> attenuated by a few dBs over the period.
>
> At that same time the flare hit Wd2xsh/7 on 495.034 appeared over the ESE
> 5000Kms path . Could be a coincidence as the path has been opening up
> around that time - signal was clean to start with - then after about 1
> hour doppler/scintillation became large with up to 1.5Hz deviation - mostly
> LF.... signal is just fading now as Louisiana sees dawn. Im still
> scratching my head but looks like the E/ESE paths from Alaska produce
> attenuated but there results thru mild proton events too - save the
> spreading etc.
>
> Laurence KL7UK
> remotely operated from somewhere where it doesnt rain a lot.
>
Attached my plot of few VLF stations and noise floor [SpectrumLab
noise_n(16000,23990)].
SID started about 29000 seconds after midnight.
Sorry for the very unusual time stamp but the recording system was partially
down; I don't have the 10 seconds data but only the 1 minute data file.
73
Claudio, IK2PII
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sid110809.png
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