Date   

Re: Pytroll/SatPy for EUMETCast

Ferdinand Valk
 

OK, I’ll try to post via wetransfer directly to the Group.

Here is a (reduced) version of S1B with changed viewing area

 

True, those hires views have a very limited coverage. We are fortunate that the event takes place at this latitude; the number of passes that see the area is so much higher than at the equator...

 

Cheers,

Ferdinand

 

From: MSG-1@groups.io On Behalf Of Ernst Lobsiger via groups.io
Sent: Friday, 11 December, 2020 11:19
To: MSG-1@groups.io
Subject: Re: [MSG-1] Pytroll/SatPy for EUMETCast

 

Ferdinand,

As I understand it you can let the link be e-mailed to (one of ) your address(es) and then post it or it can be sent directly to the MSG-1 list (?). It seems everybody knowing the link can download.

Yes the higher the resolution the lower a chance you have a good pass. You can use both Sentinel-1A/1B. Swath in SAR EW mode (as normally used in marine environments) is 410km only.

See:  https://sentinel.esa.int/web/sentinel/user-guides/sentinel-1-sar/acquisition-modes

A godd thing in my SARmicro.py script is that you can easily adjust the area (lat_0 and lon_0) to get as much of the segment at hand as possible. Nice to see your Pytroll/Satpy progress ...

Best regards
Ernst


Re: Pytroll/SatPy for EUMETCast

Graham Woolf
 

Hi Ernst

Thanks - Ill give it a try

My jpeg files arent that big though only 18Mb and 3Mb

Regards

Graham


Re: Receiving and Processing Geostationary Images

David J Taylor GM8ARV 🏴󠁧󠁢󠁳󠁣󠁴󠁿 🇪🇺
 

On 11/12/2020 10:50, Allan Sloan via groups.io wrote:
Thanks for information.
A couple of questions.
Is there a recommended DVB-S2 receiver to go for.
Is the LNB on a Sky dish suitable or is there a better alternative to use.
What is the link to get the EUMETSAT software and USB dongle.
Thanks for the help.
Regards Allan
Allan,

Receiver:
There are two basic choices - networked or dedicated. Networked are more expensive, but can feed multiple PCs. Of the dedicated the TBS range offer USB output (TBS5925 for low cost as second-hand or TBS5927 new, and perhaps slightly better performance), or PCIe card (can take both the Basic and both High-Volume services). USB works with any PC but only for BAS and HVS-1. PCIe means a desktop PC and opening it.

Suggest LNB be high gain (allowing longer cable runs) and a PLL one. I don't know how Sky mangle their LNBs - if at all. Try it and see! "Universal LNB" is a typical description. Twin output or quad (allows a separate lead for monitoring or multiple receivers):

Example:
https://www.amazon.co.uk/0-2dB-Premium-Twin-Universal-Inverto/dp/B07WFWQCKN

See the "Receiver Station" on the EUMETSAT site:
https://www.eumetsat.int/eumetcast

Includes "How to subscribe".

Cheers,
David
--
SatSignal Software - Quality software for you
Web: https://www.satsignal.eu
Email: david-taylor@blueyonder.co.uk
Twitter: @gm8arv


Re: Pytroll/SatPy for EUMETCast

Ernst Lobsiger
 

Ferdinand,

As I understand it you can let the link be e-mailed to (one of ) your address(es) and then post it or it can be sent directly to the MSG-1 list (?). It seems everybody knowing the link can download.

Yes the higher the resolution the lower a chance you have a good pass. You can use both Sentinel-1A/1B. Swath in SAR EW mode (as normally used in marine environments) is 410km only.

See:  https://sentinel.esa.int/web/sentinel/user-guides/sentinel-1-sar/acquisition-modes

A godd thing in my SARmicro.py script is that you can easily adjust the area (lat_0 and lon_0) to get as much of the segment at hand as possible. Nice to see your Pytroll/Satpy progress ...

Best regards
Ernst


Re: Receiving and Processing Geostationary Images

Allan Sloan
 

Thanks for information.

A couple of questions.

Is there a recommended DVB-S2 receiver to go for.

Is the LNB on a Sky dish suitable or is there a better alternative to use.

What is the link to get the EUMETSAT software and USB dongle.

Thanks for the help.

Regards Allan

-----Original Message-----
From: MSG-1@groups.io <MSG-1@groups.io> On Behalf Of David J Taylor GM8ARV ?????????????? ???? via groups.io
Sent: 11 December 2020 08:25
To: MSG-1@groups.io
Subject: Re: [MSG-1] Receiving and Processing Geostationary Images

On 10/12/2020 20:34, Allan Sloan via groups.io wrote:
I have just got back into receiving weather satellites, getting my RX2
and a old laptop up and running again, have now also set up a
Raspberry PI and USB dongle. This is producing very good results.

So now wanting to try Geostationary again.

Back in the day, I used a Yagi with a down convertor into my satellite
receiver at the time.

So looking to see what equipment and software is required now. and
what are the likely costs for this.

I have a sky dish ( which is lying in a corner of the garden, as I
now use Virgin ) and was wondering what else I would need. My location
is in Irvine Scotland.

So does anyone have a good write up, or a website, to guide me on my quest.

All help and assistance greatly received.

Regards

Allan Sloan
Allan,

There would be good write-ups on previous GEO Quarterly journals, now all on the Web. My Web site may help. The 1.7 GHz service is no more.

Basically:

"Satellite TV"
- 80 cm or bigger dish
- LNB
- cable

- DVB-S2 receiver, cheapest 2nd hand TBS5925, USB out so works with a portable PC too.
- EUMETSAT software and USB dongle (free)

- Processing & display software
- free (much assembly required, Windows or Linux)
- my own MSG Toolset Plus suite (ready to go, Windows)

Cheers,
David
--
SatSignal Software - Quality software for you
Web: https://www.satsignal.eu
Email: david-taylor@blueyonder.co.uk
Twitter: @gm8arv


Re: Pytroll/SatPy for EUMETCast

maurizio.calvitti@...
 

Test message

 

Da: MSG-1@groups.io <MSG-1@groups.io> Per conto di Ferdinand Valk
Inviato: venerdì 11 dicembre 2020 09:59
A: MSG-1@groups.io
Oggetto: Re: [MSG-1] Pytroll/SatPy for EUMETCast

 

Graham,

 

The M stands for Medium resolution and the H for High.

The High works fine here on a Windows 10 w 128 GB RAM .

 

Cheers,

Ferdinand

 

From: MSG-1@groups.io On Behalf Of Graham Woolf
Sent: Friday, 11 December, 2020 08:38
To: MSG-1@groups.io
Subject: Re: [MSG-1] Pytroll/SatPy for EUMETCast

 

Good Morning Ernst

Im not sure - I just downloaded the two files from your site as per your instructions

Whats the difference between GRDM and GRDH

Regards

Graham


Re: Pytroll/SatPy for EUMETCast

Ferdinand Valk
 

Ernst,

 

No flickr for me either.

 

I can post to wetransfer, but the number of addressees is limited to 2 per session. I suppose posting to the Group would count as 1 (in spite of multiple downloads)?, but maybe Graham is already doing that? If not: please yell.

 

Cheers,

Ferdinand

 

From: MSG-1@groups.io On Behalf Of Ernst Lobsiger via groups.io
Sent: Friday, 11 December, 2020 10:42
To: MSG-1@groups.io
Subject: Re: [MSG-1] Pytroll/SatPy for EUMETCast

 

Graham and Ferdinand,

I just noted that flickr wants registration (something me for one never want to do). There is a free service that let you upload files up to 2GB without registration. You can ask for a link (paying with an e-Mail address :-) ?)  and post this link here. Data will stay on their server one week (go to help and change language if necessary to see the exaxct terms). I propose you include the EU/ESA data Policy (from my receiver Io) as a file. The link is:  https://wetransfer.com/

Cheers,
Ernst


Re: Pytroll/SatPy for EUMETCast

Ferdinand Valk
 

Ernst,

Just as a proof of concept I applied the script to a sar file of December 7,
with the attached result (reduced to 2000 px square). South Georgia did not
appear to be available that day, so the coverage is limited.

Thanks for your input!

Ferdinand


Re: Pytroll/SatPy for EUMETCast

Ernst Lobsiger
 

Graham and Ferdinand,

I just noted that flickr wants registration (something me for one never want to do). There is a free service that let you upload files up to 2GB without registration. You can ask for a link (paying with an e-Mail address :-) ?)  and post this link here. Data will stay on their server one week (go to help and change language if necessary to see the exaxct terms). I propose you include the EU/ESA data Policy (from my receiver Io) as a file. The link is:  https://wetransfer.com/

Cheers,
Ernst


Re: Pytroll/SatPy for EUMETCast

Ernst Lobsiger
 

Graham and Ferdinand,

thanks for those performance figures. It seems I have no chance with my old machines to make a GRDH image with my own scripts :-(. I got a maximum 24GB of RAM in one 8 year old Fujitsu Celsius W520 Power WS I bought for CHF 150.-- (original price lowered because it was 2 years older than advertised) from e-Bay.de. Graham could you make the four possible composites as GRDH and put them on e.g flickr (no idea how to do that, image file limit seems to be 200MB) or a similar web service and post al link here? So others on MSG-1 can see/download the highest resolution results of A68a so far. You should mention "Copernicus Sentinel data 2020" to be consistant with the EU/ESA Copernicus  data policy.

Cheers,
Ernst


Re: Pytroll/SatPy for EUMETCast

Ferdinand Valk
 

Ernst,

 

In order to have more complete info on time:

 

Your script runs here on Windows 10, 128 GB RAM and sar_ice selected in the script:

Medium resolution: 56”

High Resolution 2’ 21”

CPU occupation for this event up to 73%

RAM had brief moment of 55 GB used for this event but stayed mostly around 30 to 40.

 

Certainly doable but resource intensive

 

Cheers,

Ferdinand

 

 

From: MSG-1@groups.io On Behalf Of Ferdinand Valk
Sent: Friday, 11 December, 2020 08:59
To: MSG-1@groups.io
Subject: Re: [MSG-1] Pytroll/SatPy for EUMETCast

 

Graham,

 

The M stands for Medium resolution and the H for High.

The High works fine here on a Windows 10 w 128 GB RAM .

 

Cheers,

Ferdinand

 

From: MSG-1@groups.io On Behalf Of Graham Woolf
Sent: Friday, 11 December, 2020 08:38
To: MSG-1@groups.io
Subject: Re: [MSG-1] Pytroll/SatPy for EUMETCast

 

Good Morning Ernst

Im not sure - I just downloaded the two files from your site as per your instructions

Whats the difference between GRDM and GRDH

Regards

Graham


Re: Pytroll/SatPy for EUMETCast

Graham Woolf
 

Hi all

Just ran the script with the H setting

CPU peaked at about 70% for a few seconds but was generally in the low teens

Ram used peaked at about 90GB but generally around 50GB

It took 3 minutes to process

Regards

Graham


Re: Pytroll/SatPy for EUMETCast

Ferdinand Valk
 

Graham,

 

The M stands for Medium resolution and the H for High.

The High works fine here on a Windows 10 w 128 GB RAM .

 

Cheers,

Ferdinand

 

From: MSG-1@groups.io On Behalf Of Graham Woolf
Sent: Friday, 11 December, 2020 08:38
To: MSG-1@groups.io
Subject: Re: [MSG-1] Pytroll/SatPy for EUMETCast

 

Good Morning Ernst

Im not sure - I just downloaded the two files from your site as per your instructions

Whats the difference between GRDM and GRDH

Regards

Graham


Re: Pytroll/SatPy for EUMETCast

Graham Woolf
 

Hi Ernst

You were right - I was too keen . Mind you it was late last night when I tried

I will try the 'H' file today

Regards

Graham


Re: Pytroll/SatPy for EUMETCast

Ernst Lobsiger
 

On Fri, Dec 11, 2020 at 12:37 AM, Graham Woolf wrote:
Good Morning Ernst

Im not sure - I just downloaded the two files from your site as per your instructions

Whats the difference between GRDM and GRDH

Regards

Graham
Graham,

you can check the number of pixels of the resulting image. I almost knew you would just start the script. But as distributed it will make a 4000x4000 image which is good for GRDM (see filename of *.zip) data. GRDH is higher resolution data (see size of the *.zip). You have received 2 x the same segment but as GRDM and GRDH. To make the GRDH image change in the script resolution='H' (I distributed it with resolution='M') and rerun it again. Then report your figures again.

Best regards
Ernst

P.S. The string GRDM or GRDH is also in the filename of the resulting image.


Re: Pytroll/SatPy for EUMETCast

Graham Woolf
 

Good Morning Ernst

Im not sure - I just downloaded the two files from your site as per your instructions

Whats the difference between GRDM and GRDH

Regards

Graham


Re: Receiving and Processing Geostationary Images

David J Taylor GM8ARV 🏴󠁧󠁢󠁳󠁣󠁴󠁿 🇪🇺
 

On 10/12/2020 20:34, Allan Sloan via groups.io wrote:
I have just got back into receiving weather satellites, getting my RX2 and a old laptop up and running again, have now also set up a Raspberry PI and USB dongle. This is producing very good results.
So now wanting to try Geostationary again.
Back in the day, I used a Yagi with a down convertor into my satellite receiver at the time.
So looking to see what equipment and software is required now. and what are the likely costs for this.
I have a sky dish  ( which is lying in a corner of the garden, as I now use Virgin ) and was wondering what else I would need. My location is in Irvine Scotland.
So does anyone have a good write up, or a website, to guide me on my quest.
All help and assistance greatly received.
Regards
Allan Sloan
Allan,

There would be good write-ups on previous GEO Quarterly journals, now all on the Web. My Web site may help. The 1.7 GHz service is no more.

Basically:

"Satellite TV"
- 80 cm or bigger dish
- LNB
- cable

- DVB-S2 receiver, cheapest 2nd hand TBS5925, USB out so works with a portable PC too.
- EUMETSAT software and USB dongle (free)

- Processing & display software
- free (much assembly required, Windows or Linux)
- my own MSG Toolset Plus suite (ready to go, Windows)

Cheers,
David
--
SatSignal Software - Quality software for you
Web: https://www.satsignal.eu
Email: david-taylor@blueyonder.co.uk
Twitter: @gm8arv


Re: RX 2 wanted

Allan Sloan
 

David,

Thanks for the suggestion of Raspberry PI & USB dongle.

Have now had one set up and working to the references you gave me.

All working well. Cant wait until i can get some better visible images.

Thanks again.

Regards Allan


Receiving and Processing Geostationary Images

Allan Sloan
 

I have just got back into receiving weather satellites, getting my RX2 and a old laptop up and running again, have now also set up a Raspberry PI and USB dongle. This is producing very good results.

So now wanting to try Geostationary again.

Back in the day, I used a Yagi with a down convertor into my satellite receiver at the time.

So looking to see what equipment and software is required now. and what are the likely costs for this.

I have a sky dish  ( which is lying in a corner of the garden, as I now use Virgin ) and was wondering what else I would need. My location is in Irvine Scotland.

So does anyone have a good write up, or a website, to guide me on my quest.

All help and assistance greatly received.

Regards

Allan Sloan

 


Re: Pytroll/SatPy for EUMETCast

Ernst Lobsiger
 

Graham,

I assume this is the GRDM or is it the 8000x8000 GRDH? If you can easily make GRDH
composites maybe you find a place on the NET where we can download them. There
is an EU Copernicus Data Policy also on my receiver I0. Io did take all 3 EUMETCast
services with no packet missed while a couple of users stressed apache2 with download.

Cheers,
Ernst

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