[Moon] Partial eclipse tomorrow
Edward R Cole
kl7uw at acsalaska.net
Fri Mar 20 18:34:49 CET 2015
Re: Kjell sun-noise observations.
I suspect your TS2000 AGC is still compressing the Y-factor. I
measure about 8-dB Ysun/cs on 2m with my 4x XP-20. Of course we
could not see the eclipse on this side of the world.
I checked my 1296 system with sfu=120 at 15.3 dB a few days
ago. That's a little low but sun angle was close to my shed roof and
tree line so cs probably was high. A year ago I measured 16-dB.
Guess we will find out tomorrow on the moon.
73, Ed - KL7UW
At 09:21 AM 3/20/2015, peter blair wrote:
> Hi Kjell, Thank you for that measurement, we don't have much from
> the lower frequencies, great data. 73 Peter
>From: Kjell Jarl <K-Jarl at algonet.se>
>To: peter blair <g3ltf at btinternet.com>; "moon at moonbounce.info"
><moon at moonbounce.info>
>Sent: Friday, 20 March 2015, 16:16
>Subject: Re: [Moon] Partial eclipse tomorrow
>
>Hi Peter and the group,
>If it is could be of interest to any one but myself, here are my results
>on 144 MHz.
>
><http://sm7gvf.dyndns.org/sm7gvf/sm4gvf/partial_Solar.html>http://sm7gvf.dyndns.org/sm7gvf/sm4gvf/partial_Solar.html
>
>73
>Kjell
>
>
>On 2015-03-19 11:16, peter blair wrote:
> > If at all possible try and make an accurate measurement of sun noise
> > during the eclipse period on what ever band you can. Ideally we are
> > looking for the ratio between normal level (measured on the same day)
> > and the minimum sun noise occurring at the time of maximum shadowing.
> > You can get the timing for your exact location from this link.
> >
> <http://eclipse.gsfc.nasa.gov/SEgoogle/SEgoogle2001/SE2015Mar20Tgoogle.html>http://eclipse.gsfc.nasa.gov/SEgoogle/SEgoogle2001/SE2015Mar20Tgoogle.html
> > We believe that we can possibly accumulate some interesting measurements
> > on a non-quiet sun which might indicate how much noise comes from the
> > corona compared to the disc. This influences what value is used for the
> > solar diameter when making beamwidth measurements for example.
> > GL 73 Peter G3LTF
>
> >
> >
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>
> >
>
>
>
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73, Ed - KL7UW
http://www.kl7uw.com
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