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Re: High SNR on TP1
Ernst Lobsiger
On Wed, Sep 8, 2021 at 08:34 AM, <geojohnt@...> wrote:
However, this appears not to have been seen - or much of - by our Scottish members outside the central max power contour.John, David and Ferdinand, thanks for the background info. It seems indeed that the increase of SNR is best seen on the continent. Here are three more TC stations that show a similar TP1 SNR step I noted around early August 2021. Regards, Ernst
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Re: overlays for goes 16
Andrea Battistella
Dear Rob
I'm decoding hdf files from GOES16 ( 75W ) not 17 using xrit2pic version 2020.3c best regards Andrea
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Re: High SNR on TP1
geojohnt@...
Hello Ernst, Ferdinand and David,
David knows this.
But I've been prodding Ops regularly for a couple of months now with my signal readings as to the reduction in SNR - and thus Link Margin a couple of months ago and the wildly volatile SNR level I had witnessed at time.
They confirmed the TP 1 SNR was showing a period of volitivity and thought it might be due to interference from 'external sources.'
They undertook several tests but were unable to prove this fact. Later, a couple of days was spent tweaking and checking both EUMETCast transponders by the service providers and the attached EUMETSAT graphs show quite an improvement in SNR was achieved.
However, this appears not to have been seen - or much of - by our Scottish members outside the central max power contour.
Ops summing up is copied below
Dear John,
In regards to the issue of the recent continuing reduction of TP1 SNR, the attached plot shows that the link margins of transponder 1 have recovered and are now even higher than the previous average in 2020. The values are close to the all-time highs observed during the mission. It cannot be ensured that it stays at that level due to operational constraints given by EUTELSAT.
The average values on transponder 1 from January until June are the long term guaranteed values. For HVS-1 these values are similar to the HVS-2 link margins on the second transponder.
The intermittent degradation periods starting end of June could not be tracked to a specific root cause. It is considered to be caused by an interference from an unknown source.
We also emphasise that following the antenna size recommendations will provide enough link margin to cover such degradation, which are on the 3rd place of reasons for reception problems, after weather and reception station issues.
 We hope the above helps.
I have seen quite a good increase in my TP 1 SNR here in SW London and now my clear sky SNR [1 m dish, Inverto Black Ultra quad LNB and an SR1 receiver] is at a diurnal max of 14.2 dB.
Which it hasn't been for many months.
And the volitivity has gone
Regards,
John
+++++++++++++++++
-----Original Message-----
From: Ferdinand Valk <fvalk@...> To: MSG-1@groups.io Sent: Wed, 8 Sep 2021 14:30 Subject: Re: [MSG-1] High SNR on TP1 Ernst,
I have recently relocated to the southwest of the country exactly during the period of the signal increase you mentioned. My current average fair weather SNR of 16.5 dB is about 1.5 dB higher than it used to be at my old place and it is difficult to say how much of that increase is attributable to a better spot within the footprint, how much to finetuning the new antenna setup and how much to upping Transponder power at the satellite. In short, the interpretation of the graph you attached of my SNR is not straightforward and may lead to wrong conclusions.
Cheers,
Ferdinand
From: MSG-1@groups.io On Behalf Of Ernst Lobsiger via groups.io
Sent: Wednesday, 08 September, 2021 08:11 To: MSG-1@groups.io Subject: [MSG-1] High SNR on TP1 Hi All
While I read frequent complaints about low SNR nobody seems to wonder about high SNR. Since August 10th 2021 I have SNR above 15dB on a regular basis on TP1. I cannot remember such a period and I don't think there was a gust that gave my dish a lucky punch. Regards, Ernst
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Re: overlays for goes 16
On 08/09/2021 14:30, R. Alblas wrote:
xrit2pic supports overlays using a 'picture' (as delivered by Eumetsat)Rob, Good to hear from you. I had some minor offsets when using GSHHS and the theoretical values for standard HRIT/LRIT format data. I spent some time with e-mail exchanges with NOAA until this was resolved. I can't recall the exact details now - let me check....yes, there were some unusual features in sat-to-earth (and likely earth-to-sat) which I had to code separately. I never did get an explanation why using the standard WMO equations wasn't good enough.... I'm using the images as sent over EUMETCast and the match is now excellent. Cheers, David -- SatSignal Software - Quality software for you Web: https://www.satsignal.eu Email: david-taylor@blueyonder.co.uk Twitter: @gm8arv
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Re: overlays for goes 16
R. Alblas
Andrea,
toggle quoted messageShow quoted text
xrit2pic supports overlays using a 'picture' (as delivered by Eumetsat) and vectorized overlay files from the Global Self-consistent, Hierarchical, High-resolution Geography Database. I have to check if Eumetsat has overlay files for GOES17; and then check if that works with xrit2pic; maybe an update is needed. The Global Self-consistent, Hierarchical, High-resolution Geography Database gives coast overlays world wide, but that needs location info from the satellite file. Which works with with data in HRIT/LRIT format, like MSG and GOES12. Not sure if that works with GOES17; I think you use hdf files? Regards, Rob.
On 09/08/2021 10:49 AM, David J Taylor GM8ARV 🏴 🇪🇺 via groups.io wrote:
On 08/09/2021 09:37, Andrea Battistella wrote:I'm using xrit2pic on Ubuntu 18Andrea,
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Re: High SNR on TP1
Ferdinand Valk
Ernst,
I have recently relocated to the southwest of the country exactly during the period of the signal increase you mentioned. My current average fair weather SNR of 16.5 dB is about 1.5 dB higher than it used to be at my old place and it is difficult to say how much of that increase is attributable to a better spot within the footprint, how much to finetuning the new antenna setup and how much to upping Transponder power at the satellite. In short, the interpretation of the graph you attached of my SNR is not straightforward and may lead to wrong conclusions.
Cheers, Ferdinand
From: MSG-1@groups.io On Behalf Of Ernst Lobsiger via groups.io
Sent: Wednesday, 08 September, 2021 08:11 To: MSG-1@groups.io Subject: [MSG-1] High SNR on TP1
Hi All
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Re: High SNR on TP1
James Brown
Very helpful. Thank you David.
toggle quoted messageShow quoted text
JB
On 8 Sep 2021, at 09:40, David J Taylor GM8ARV 🏴 🇪🇺 via groups.io <david-taylor=blueyonder.co.uk@groups.io> wrote:
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Re: overlays for goes 16
On 08/09/2021 09:37, Andrea Battistella wrote:
I'm using xrit2pic on Ubuntu 18Andrea, I expect that the images into GeoSatSignal are the same as those from my own GOES ABI Manager software (free) - the sample I demonstrated was named: 202109080730-g16-b12.jpg Whilst I've not tested it myself, I would expect GeoSatSignal to run under Virtual Box or VMWare and some of my software does run directly under Wine. It may even run under the Twister OS on a Raspberry Pi 4, but I would not expect a high performance from that combination! Rob Alblas can help with his own software, of course. Cheers, David -- SatSignal Software - Quality software for you Web: https://www.satsignal.eu Email: david-taylor@blueyonder.co.uk Twitter: @gm8arv
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Re: High SNR on TP1
On 08/09/2021 09:10, Ernst Lobsiger via groups.io wrote:
Hi AllIndeed, not, Ernst! No complaints from your more northerly and westerly cousins! I gather that following all our queries about signal strength, transponder 1 is now running at its highest power level before running into non-linearity, so it has less than the normal back-off of 1.5 dB. EUMETSAT note that this may not be maintained. Unfortunately transponder 2 cannot run like this (perhaps running continuous 16APSK affects this) and hence it is backed off about 1.4 dB from full power. I guess that if the power is turned up various intermodulation products or non-linearities will actually reduce the link margin even though the signal level is higher. AM-PM conversion and all that, plus spreading of the spectrum. There is a suggestion that some of the degradation some of us see is due to using dishes which are too small, and hence picking up interference from other satellites. EUMETSAT's reference dishes are 180 cm which have a narrower beam-width. Cheers, David -- SatSignal Software - Quality software for you Web: https://www.satsignal.eu Email: david-taylor@blueyonder.co.uk Twitter: @gm8arv
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Re: overlays for goes 16
Andrea Battistella
I'm using xrit2pic on Ubuntu 18
thanks Andrea
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High SNR on TP1
Ernst Lobsiger
Hi All
While I read frequent complaints about low SNR nobody seems to wonder about high SNR. Since August 10th 2021 I have SNR above 15dB on a regular basis on TP1. I cannot remember such a period and I don't think there was a gust that gave my dish a lucky punch. Regards, Ernst
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Re: overlays for goes 16
On 08/09/2021 06:20, Andrea Battistella wrote:
HiMy GeoSatSignal program does that - see the sample. Is that the software which you are using? Cheers, David -- SatSignal Software - Quality software for you Web: https://www.satsignal.eu Email: david-taylor@blueyonder.co.uk Twitter: @gm8arv
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overlays for goes 16
Andrea Battistella
Hi
is it possible to have overlays ( coast and country ) for GOES 16 channel M6C12 ? Thanks in advance Andrea
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telegram group or channel
Antonio Angelotti
Hello Everybody, I was wondering if there is a telegram group or channel where we can share images and thoughts. Cheers Antonio
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Re: New dish
Vincenzo Mone
Guys,
toggle quoted messageShow quoted text
This morning i was testing with my 100cm Dish as I think I do not have enough space For the 102cm one. I have tried to put to the maximum signal on the SR1 Controller Program and I got 12.0 but the Icons in the Tray stays yellow instead to turn white. Please what to check? Thanks 73 de Enzo IK8OZV EasyLog 5 BetaTester EasyLog PDA BetaTester WinBollet BetaTester D.C.I. CheckPoint Regione Campania Skype: ik8ozv8520 ********************************* ****** GSM +39 328 7110193 ****** ***** SMS +39 328 7110193 ***** *********************************
-----Messaggio originale-----
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Re: Palette
On 02/09/2021 21:49, Marco Martini wrote:
Hi where can I find other palettes for hrpt reader?Marco, Perhaps other user have some to offer? If so, I would be happy to add them to the Web site. Ciao, David -- SatSignal Software - Quality software for you Web: https://www.satsignal.eu Email: david-taylor@blueyonder.co.uk Twitter: @gm8arv
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Palette
Marco Martini
Hi where can I find other palettes for hrpt reader?
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Re: New dish
On 02/09/2021 09:52, Vincenzo Mone wrote:
Hello David,Enzo, You need to check with the person supplying the dish. 73, David GM8ARV -- SatSignal Software - Quality software for you Web: https://www.satsignal.eu Email: david-taylor@blueyonder.co.uk Twitter: @gm8arv
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Re: New dish
Vincenzo Mone
Hello David,
toggle quoted messageShow quoted text
Thanks for pointing me to the LNB and suggesting me the one with two outputs, but to avoid wSting money can you please just confirm me if this is the correct one for a 120cm dish???? Thanks a lot 73's de Enzo IK8OZV EasyLog 5 BetaTester EasyLog PDA BetaTester WinBollet BetaTester D.C.I. CheckPoint Regione Campania Skype: ik8ozv8520 ******************************************* ******* GSM +39 328 7110193 ******* ****** SMS +39 328 7110193 ******* ********************************************
Il giorno 2 set 2021, alle ore 10:24, David J Taylor GM8ARV 🏴 🇪🇺 via groups.io <david-taylor@...> ha scritto:
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Re: New dish
On 01/09/2021 20:33, Vincenzo Mone wrote:
Hello Ernst,Look up on Amazon: "Inverto Black Ultra" I found it helpful to have more than one output, and I actually have quad. This allows monitoring on the extra feeds, or even a second receiver for HVS-1 or HVS-2. 73, David -- SatSignal Software - Quality software for you Web: https://www.satsignal.eu Email: david-taylor@blueyonder.co.uk Twitter: @gm8arv
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