Date   
GOES16

James Brown
 

To save me tearing more hair - am I right that during the current suspension of Sentinal 3A GOES16 Trial dissemination is also suspended?

Cheers
James

Ayecka sr1 bs e hvs

Stefano Mina
 

Good morning. In view of the change of service transponders va16 and nooa 20 on tp1 A question to who in use Ayecka sr1 Is it possible to use the receiver for bs and hvs without data loss on Bs? It is advised to have separate receivers for each service without having to act on the link margin Thresholds?

Thank you
Stephen

Processing Sentinel data (was:Re: [MSG-1] HVS-2)

David J Taylor GM8ARV ๐Ÿด๓ ง๓ ข๓ ณ๓ ฃ๓ ด๓ ฟ ๐Ÿ‡ช๐Ÿ‡บ
 

David, could you please expand a little on this comment you made?
Regards, Peter
=====================================

Peter,

Please see:

https://scihub.copernicus.eu/

From that page:

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
The Copernicus Open Access Hub (previously known as Sentinels Scientific Data Hub) provides complete, free and open access to Sentinel-1, Sentinel-2 and Sentinel-3 user products, starting from the In-Orbit Commissioning Review (IOCR).

Open Access Hub : access point for all Sentinel missions with access to the interactive graphical user interface.

API Hub : access point for API users with no graphical interface. All API users regularly downloading the latest data are encouraged to use this access point for a better performance.

Sentinel-3A Pre-operational Hub : pre-operational access point for all users to Sentinel-3 L1 and L2 Land data. Login credentials are s3guest:s3guest .

Sentinels GNSS Rinex Pre-operational Hub : pre-operational access point for all users to the GNSS L1b products in Rinex format of all the Sentinel platforms in operations. Login credentials are gnssguest:gnssguest
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

There are a number of such sites perhaps folks might like to say which one they find the best. One chap who does some interesting and helpful image processing and channel combinations is Pierre Markuse

https://pierre-markuse.net/

I believe his tools are free-of-charge, but I've not used that site myself. As with many folks involved in the Copernicus/Sentinel data he is on Twitter:

https://twitter.com/Pierre_Markuse

I have some information about my own processing of Internet-sourced Sentinel 2A data here:

http://www.satsignal.eu/wxsat/Sentinel/Sentinel-2A.html

Cheers,
David
--
SatSignal Software - Quality software written to your requirements
Web: http://www.satsignal.eu
Email: david-taylor@...
Twitter: @gm8arv

Re: HVS-2

diogenes1@...
 

David, could you please expand a little on this comment you made?
Regards, Peter



>
> I haven't looked at Sentinel data for a while, to be honest, and mot
> likelyย  I would use an Internet service now that such good processing
> algorithms are > available free of charge.

Re: HVS-2

Douglas Deans
 

On 19/06/2018 10:06, James Brown wrote:
On 18/06/2018 16:26, Douglas Deans via Groups.Io wrote:
One input OF MY TBS 6903 is handling the new S3A data and the existing data very well on the HVS-2 service.
So S3A ERR and EFR, NOAA 20 VIIRS M and DNB, and GOES 16 ABI and GLM sometimes simultaneously without loss.
Bodes well for S3B being added and NOAA 20 and GOES 16 going to HVS-1 (on the other 6903 input).


Regards,
Douglas.
I haven't seen a corresponding update on the transfer of GOES16 & NOAA20 data yet - I guess that info should be coming soon.
Cheers
James
==========================================================================

James the timings of the change for NOAA 20 and GOES 16 are on the same announcement :-

https://www.eumetsat.int/website/home/News/DAT_3942692.html

So parallel operation for NOAA 20 and GOES 16 will start on 22nd August and by 11th September those services will only be available on HVS-1.

I assume the only name change will be the prefix from E2H to E1H

Regards,
Douglas.

Re: HVS-2

James Brown
 

On 19/06/2018 10:25, David J Taylor via Groups.Io wrote:
I haven't seen a corresponding update on the transfer of GOES16 & NOAA20
data yet - I guess that info should be coming soon.

Cheers
James
=====================================

James,

Yes, in August-September:

ย https://www.eumetsat.int/website/home/News/DAT_3942692.html?lang=EN&pState=1

Cheers,
David
Yes indeed I saw that - it was the bit at the end I was thinking of - namely:

For the transfer of GOES-16 and NOAA-20 data to TP1, more information will be provided in due course.

Cheers

James

Re: HVS-2

David J Taylor GM8ARV ๐Ÿด๓ ง๓ ข๓ ณ๓ ฃ๓ ด๓ ฟ ๐Ÿ‡ช๐Ÿ‡บ
 

I haven't seen a corresponding update on the transfer of GOES16 & NOAA20
data yet - I guess that info should be coming soon.

Cheers
James
=====================================

James,

Yes, in August-September:

https://www.eumetsat.int/website/home/News/DAT_3942692.html?lang=EN&pState=1

Cheers,
David
--
SatSignal Software - Quality software written to your requirements
Web: http://www.satsignal.eu
Email: david-taylor@...
Twitter: @gm8arv

Re: HVS-2

James Brown
 

On 18/06/2018 16:26, Douglas Deans via Groups.Io wrote:
One input OF MY TBS 6903 is handling the new S3A data and the existing data very well on the HVS-2 service.
So S3A ERR and EFR, NOAA 20 VIIRS M and DNB, and GOES 16 ABI and GLM sometimes simultaneously without loss.
Bodes well for S3B being added and NOAA 20 and GOES 16 going to HVS-1 (on the other 6903 input).


Regards,
Douglas.
I haven't seen a corresponding update on the transfer of GOES16 & NOAA20 data yet - I guess that info should be coming soon.

Cheers
James

Re: HVS-2

Douglas Deans
 

On 18/06/2018 16:59, David J Taylor via Groups.Io wrote:
One input OF MY TBS 6903 is handling the new S3A data and the existing
data very well on the HVS-2 service.
So S3A ERR and EFR, NOAA 20 VIIRS M and DNB, and GOES 16 ABI and GLM
sometimes simultaneously without loss.
Bodes well for S3B being added and NOAA 20 and GOES 16 going to HVS-1
(on the other 6903 input).
Regards,
Douglas.
================================
Thanks for the report, Douglas.ย  I've configured my single-cable TBS6903 system to handle both data streams, but the initial impression is that sending 600 MB files over the network to the processing PC every few minutes is not such a great idea.ย  I'll leave it for a while, but I'm coming round more to thinking of a single PC for both receive and processing may be a better option for these large data streams.
The issue only arose because the S3A data used to be on a PC handling HVS-1, and now it will have to move to HVS-2 which is currently on a different PC. Once the swaps are complete I'll have to think about possible reconfiguration.
I haven't looked at Sentinel data for a while, to be honest, and mot likely I would use an Internet service now that such good processing algorithms are available free of charge.ย  I do watch the GOES-16 data, and occasionally NOAA-20 (e.g. day-night).
73,
David GM8ARV
=============================================================================

Very interesting David. I use a single computer which is now over 5 years old although was cutting edge at the time ! My current arrangement is now the SR1 for BS and the TBS 6903 (input 0) for HVS-2. When NOAA 20 and GOES 16 move to HVS-1, I will use the second TBS 6903 input (single cable input system using BDADataEx).

Strangely after years of problems with HVS data using the SR1 (although proven not to be an issue with the SR1 itself) a recent test shows that the issue has gone. No idea why but suspect windows update as I have not changed anything during the previous years of problems.
However I will probably leave the BS service on its own given the Scottish winters (and recently the Scottish summer !!).

We are spoilt for choice.

Regards.
Douglas.

Re: Signal

Ian Deans
 

On 18/06/2018 11:40, Ferdinand Valk wrote:

-----Original Message-----
From: MSG-1@groups.io <MSG-1@groups.io> On Behalf Of Ian Deans via
Groups.Io
Sent: Monday, 18 June, 2018 09:34
To: MSG-1@groups.io
Subject: [MSG-1] Signal


I have to report that I am still seeing a drop of approx. 0.5 SNR on my
TP1 signal.

In fact today both my TP1 and TP2 signals are identical at about 13.00 SNR. My
TP1 signal does vary by about 0.7 SNR over a full day with the best signal ( 13.8
/ 14.00 ) overnight, probably due to my northerly location. I am using a 1.1
meter dish.

Regards
Ian.
============================================
Ian,
Before the time of change I had a difference of about 0.1 dB in favour of TP-1. Now I'm measuring a difference of about 0.7 dB also in favour of TP1.
I can only account numbers reliably as from April last, because then the dish had to be realigned after the storm earlier in the year.
If I take the max SNR levels as reference: April was TP1= 15.5 and TP2= 15.4 dB. Current situation TP1=15.9 and TP2= 15.2 dB (these numbers are taken from the link margin graph plus 9.3 dB).
Of course you are in a more marginal region of the satellite's footprint, but as my TP1 went up considerably (at the expense of TP2) it is strange that yours went down instead. I can't explain it but it looks as if the focus of the footprint has changed a bit?
Cheers,
Ferdinand
====================================================

Thanks for your mail Ferdinand. It does appear that your recent experience with signal levels is almost opposite to me.

I know Douglas who is about 55 miles south west of me is also seeing a reduction in TP1 SNR, but on the other hand his TP2 signal has always been over 1 SNR lower than TP1 ( similar to David's ) and as I understand he was not able to better the TP2 signal with a dish adjustment.

I am also seeing larger swings in both the TP1 and TP2 signal than I would normally expect.

Regards
Ian.

Re: Signal

David J Taylor GM8ARV ๐Ÿด๓ ง๓ ข๓ ณ๓ ฃ๓ ด๓ ฟ ๐Ÿ‡ช๐Ÿ‡บ
 

Folks,

Do be aware that the reported link margin or SNR can vary according to whether TP1 is in low or high-bandwidth mode - for example look at the top image here:

http://www.ing-miglus.de/eumetcast/dual-link-margin.html

and note the periodicity in today's readings. I believe this may be due to the different energy distribution in the two modes.

Cheers,
David
--
SatSignal Software - Quality software written to your requirements
Web: http://www.satsignal.eu
Email: david-taylor@...
Twitter: @gm8arv

Re: HVS-2

David J Taylor GM8ARV ๐Ÿด๓ ง๓ ข๓ ณ๓ ฃ๓ ด๓ ฟ ๐Ÿ‡ช๐Ÿ‡บ
 

One input OF MY TBS 6903 is handling the new S3A data and the existing
data very well on the HVS-2 service.
So S3A ERR and EFR, NOAA 20 VIIRS M and DNB, and GOES 16 ABI and GLM
sometimes simultaneously without loss.
Bodes well for S3B being added and NOAA 20 and GOES 16 going to HVS-1
(on the other 6903 input).

Regards,
Douglas.
================================

Thanks for the report, Douglas. I've configured my single-cable TBS6903 system to handle both data streams, but the initial impression is that sending 600 MB files over the network to the processing PC every few minutes is not such a great idea. I'll leave it for a while, but I'm coming round more to thinking of a single PC for both receive and processing may be a better option for these large data streams.

The issue only arose because the S3A data used to be on a PC handling HVS-1, and now it will have to move to HVS-2 which is currently on a different PC. Once the swaps are complete I'll have to think about possible reconfiguration.

I haven't looked at Sentinel data for a while, to be honest, and mot likely I would use an Internet service now that such good processing algorithms are available free of charge. I do watch the GOES-16 data, and occasionally NOAA-20 (e.g. day-night).

73,
David GM8ARV
--
SatSignal Software - Quality software written to your requirements
Web: http://www.satsignal.eu
Email: david-taylor@...
Twitter: @gm8arv

HVS-2

Douglas Deans
 

One input OF MY TBS 6903 is handling the new S3A data and the existing data very well on the HVS-2 service.
So S3A ERR and EFR, NOAA 20 VIIRS M and DNB, and GOES 16 ABI and GLM sometimes simultaneously without loss.
Bodes well for S3B being added and NOAA 20 and GOES 16 going to HVS-1 (on the other 6903 input).


Regards,
Douglas.

Re: Signal

Ferdinand Valk
 

-----Original Message-----
From: MSG-1@groups.io <MSG-1@groups.io> On Behalf Of Ian Deans via
Groups.Io
Sent: Monday, 18 June, 2018 09:34
To: MSG-1@groups.io
Subject: [MSG-1] Signal


I have to report that I am still seeing a drop of approx. 0.5 SNR on my
TP1 signal.

In fact today both my TP1 and TP2 signals are identical at about 13.00 SNR. My
TP1 signal does vary by about 0.7 SNR over a full day with the best signal ( 13.8
/ 14.00 ) overnight, probably due to my northerly location. I am using a 1.1
meter dish.

Regards
Ian.
============================================
Ian,

Before the time of change I had a difference of about 0.1 dB in favour of TP-1. Now I'm measuring a difference of about 0.7 dB also in favour of TP1.
I can only account numbers reliably as from April last, because then the dish had to be realigned after the storm earlier in the year.

If I take the max SNR levels as reference: April was TP1= 15.5 and TP2= 15.4 dB. Current situation TP1=15.9 and TP2= 15.2 dB (these numbers are taken from the link margin graph plus 9.3 dB).
Of course you are in a more marginal region of the satellite's footprint, but as my TP1 went up considerably (at the expense of TP2) it is strange that yours went down instead. I can't explain it but it looks as if the focus of the footprint has changed a bit?

Cheers,
Ferdinand

Signal

Ian Deans
 

I have to report that I am still seeing a drop of approx. 0.5 SNR on my TP1 signal.

In fact today both my TP1 and TP2 signals are identical at about 13.00 SNR. My TP1 signal does vary by about 0.7 SNR over a full day with the best signal ( 13.8 / 14.00 ) overnight, probably due to my northerly location. I am using a 1.1 metre dish.

Regards
Ian.

Re: Signal Drop

David J Taylor GM8ARV ๐Ÿด๓ ง๓ ข๓ ณ๓ ฃ๓ ด๓ ฟ ๐Ÿ‡ช๐Ÿ‡บ
 

All,

TP 1 SNR still 'low' down here and I've just had a go at realignment of my 1 m dish.
No improvement.

The level is 'stepping around' all the time, apart from being lower.
16:05 this afternoon the SNR stepped from 14.1 dB to 13.6 dB and back up to 13.8 and then up and down 13.9, 13.7, 13.4, up and down.

Does anyone know if the V channel on the same downlink frequency is fired up?

If it isn't them perhaps the neighbours fir tree has expanded but I won't know that till co-linearity comes round again.

At times my SNR is 1 dB down from its usual maximum level under clear skies.
And I haven't achived that high level for several weeks now.

Regards,
John.
===================================

John,

I've seen the SNR vary between BS and HVS so the value you get may depend on the exact content being sent at the time. This can be seen particularly well in the Brussels data here:

http://www.satsignal.eu/mrtg/performance_eumetcast-europe_link_margin.php

The V signal was on this morning and is on at 18:26 UTC. Arne's plot is one of the more stable, so you might like to compare the longer term variation here:

http://home.hccnet.nl/a.van.belle/MRTG/dvbdataex-lmc-p1-tbs6983-tunera.html

or by clicking on one of the graphs above. Get rid of the tree! LOL!

Cheers,
David
--
SatSignal Software - Quality software written to your requirements
Web: http://www.satsignal.eu
Email: david-taylor@...
Twitter: @gm8arv

Re: Signal Drop

geojohnt@...
 

All,

TP 1 SNR still 'low' down here and I've just had a go at realignment of my 1 m dish.
No improvement.

The level is 'stepping around' all the time, apart from being lower.
16:05 this afternoon the SNR stepped from 14.1 dB to 13.6 dB and back up to 13.8 and then up and down 13.9, 13.7, 13.4, up and down.

Does anyone know if the V channel on the same downlink frequency is fired up?

If it isn't them perhaps the neighbours fir tree has expanded but I won't know that till co-linearity comes round again.

At times my SNR is 1 dB down from its usual maximum level under clear skies.
And I haven't achived that high level for several weeks now.

Regards,
John.

++++++++++++++++++

In a message dated 14/06/2018 10:56:21 GMT Standard Time, geojohnt@... writes:

Ian, Douglas and All,

I have been experiencing lower signal levels on TP 1 for 'several' weeks now in the mornings.
We've had a lot of hot humid weather down here and the LNB is getting a daily baking.
But the signal never reaches previous levels when things cool down.

I did try a quick re-alignment the other day but couldn't better the SNR.

????

Regards,
John

Re: TP1-TP2 changes for GOES NOAA-20 and Sentinel 3A data

David J Taylor GM8ARV ๐Ÿด๓ ง๓ ข๓ ณ๓ ฃ๓ ด๓ ฟ ๐Ÿ‡ช๐Ÿ‡บ
 

More information:

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
For a better usage and share of the EUMETCast bandwidth between all Copernicus missions, Sentinel-3 data and future Copernicus data will be gathered on one same transponder, Transponder 2.

In order to achieve this, a re-organisation of the data flows on EUMETCast-Satellite is necessary. In particular, Sentinel-3A data which are currently disseminated on Transponder 1 (TP1) will be transferred to Transponder 2 (TP2).

For full details on what needs to be changed on the user side to receive the Sentinel-3A data stream on TP2, please see:
https://www.eumetsat.int/website/home/News/DAT_3942692.html

To support users in their preparation for this change, Sentinel-3A data will be available on both TP1 and TP2 during the period from 18/06/2018 to 21/08/2018. From 22/08/2018, they will only be available on TP2.

Please do not hesitate to contact us if you have any questions.

With best regards,
EUMETSAT User Service
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Note that the channel names WILL be changing. The PID is 610, the same as the GOES-16 & NOAA-20 data already on the second transponder.

Cheers,
David
--
SatSignal Software - Quality software written to your requirements
Web: http://www.satsignal.eu
Email: david-taylor@...
Twitter: @gm8arv

Re: Signal Drop

geojohnt@...
 

Ian, Douglas and All,

I have been experiencing lower signal levels on TP 1 for 'several' weeks now in the mornings.
We've had a lot of hot humid weather down here and the LNB is getting a daily baking.
But the signal never reaches previous levels when things cool down.

I did try a quick re-alignment the other day but couldn't better the SNR.

????

Regards,
John

P.S. A bit windy up there today?

++++++++++++++++++++++++++

In a message dated 13/06/2018 10:39:00 GMT Standard Time, iandeans142@... writes:


I have noticed a marked drop in the TP1 signal over the last 48 hours or
so. The TP2 signal appears nominal and on occasions can actually be
marginally higher than the TP1 signal.

Weather in Scotland is about to take a turn for the worse so will for a
time be difficult to monitor.

Regards
Ian.



Re: Signal Drop

David J Taylor GM8ARV ๐Ÿด๓ ง๓ ข๓ ณ๓ ฃ๓ ด๓ ฟ ๐Ÿ‡ช๐Ÿ‡บ
 

I have noticed a marked drop in the TP1 signal over the last 48 hours or so. The TP2 signal appears nominal and on occasions can actually be marginally higher than the TP1 signal.

Weather in Scotland is about to take a turn for the worse so will for a time be difficult to monitor.

Regards
Ian.
=====================================

Folks,

There are some plots here which may help compare with other locations

http://www.satsignal.eu/mrtg/performance_eumetcast-europe_link_margin.php?period=week
http://www.satsignal.eu/mrtg/performance_eumetcast-europe_link_margin.php?period=week#t2

If either of you could monitor it would help - we could do with more monitoring stations outside the present coverage area - even if they aren't 24 x 7!

Cheers,
David
--
SatSignal Software - Quality software written to your requirements
Web: http://www.satsignal.eu
Email: david-taylor@...
Twitter: @gm8arv