Re: TP 1 SNR reduction.


Ian and All,

I see from David's graphs that many users saw a step increase in SNR/LM at 12:00 UTC to day.

I continued my check on the Hotbird EUMETCast dissemination today moving the dish a bit further away from the fir tree than yesterday but I couldn't get an increase in my SNR.

The Hotbird transponder was turned off - well, the data stopped at 17:20:49 UTC according to the TC logs - and my SR1 was showing no lock when I had a look at 19:00 BST after watching the news.
So it was time to physically shift the dish back to its original position, realign it and reconfigure the SR1.
And I was pleased to see the Eutelsat 10 A EUMETCast signal had increased whilst I was on the other satellite.



My guess is that this signal issue is related to the Hotbird 13 degree

test which is due to complete about 14.00 UTC. In fact I have just
checked and the signal level appears to be increasing again, although I
will need better weather to completely confirm.


-----Original Message-----
From: Ian Deans via <iandeans142@...>
Sent: Fri, 7 May 2021 14:11
Subject: Re: [MSG-1] TP 1 SNR reduction.

On 07/05/2021 14:01, Douglas Deans via wrote:
> On 07/05/2021 13:44, David J Taylor GM8ARV 🏴 🇪🇺 via wrote:
>> On 06/05/2021 15:25, geojohnt via wrote:
>>> Hello All,
>>> I see from my own readings and David's across Europe signal graphs
>>> that most of us have seen a step drop in SNR/LM at 13:00 UTC today.
>>> My SNR is down from 13.5 this morning to around 12.5 dB with some
>>> cloud now.
>>> Regards,
>>> John Tellick.
>> Folks,
>> I headlined this in my daily report to EUMETSAT.  Previous responses
>> have suggested that as long as the signal is above the minimum agreed
>> level there's no need for action (by EUMETSAT).  They are in the hands
>> of their service provider, of course, they don't run the uplink
>> themselves.
>> Cheers,
>> David
> ============================================================================
> Thanks David and I do agree. Nevertheless up here where the signal is
> more marginal it is annoying that there is an additional 1dB (which I
> lost yesterday) available. We know the back-up station can provide good
> improvements for example.
> Regards,
> Douglas.


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