[Moon] Partial eclipse tomorrow

[Kjell Jarl]

Hi Ed,
Thank you for your comment.

I suspect my antennas are not working properly based on varying VSWR, 
among other observations, I added that to the web page now. I will 
measure the sun noise again tomorrow, including a wide band receiver, 
and see if I see any difference. I had the AGC backed of by about 4.5 dB 
for the relative -0.5 dB point, I thought it should be enough.

The antennas are half of my 8x8 el array (I0JXX) - I have disconnected 
half due to a power divider that is broken and out of reach. With the 
full system I never had more than 5.5 dB of sun noise (SFU=78 or so), it 
is a bit disappointing.

73
Kjell

On 2015-03-20 18:34, Edward R Cole wrote:
> 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
>>
>> 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
>>
>> > 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
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