overlays


David J Taylor GM8ARV 🏴󠁧󠁢󠁳󠁣󠁴󠁿 🇪🇺
 

On 04/09/2022 20:36, Robert Moore wrote:
Thanks David, I cannot look at any VIS images at present because I turned my PC off while away at a conference. Now only have IR images from this evening, will pick this up again tomorrow.
Meanwhile, my equivalent file attached.

Robert
Robert,

Thanks for the screenshot. The rectification point at 45.5 degrees is correct,
and the program uses that value (+/- 0.5 degrees) to change the "msg" in the
saved image file name to "iodn". The previous program changed "msg" to "iodc",
so if that worked before the update it should continue to work after the
update, with "iodc" becoming "iodn".

I've had no other reports of this issue.
I have no idea what's happening!

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


Robert Moore
 

Thanks David, I cannot look at any VIS images at present because I turned my PC off while away at a conference. Now only have IR images from this evening, will pick this up again tomorrow.
Meanwhile, my equivalent file attached.

Robert

-----Original Message-----
From: MSG-1@groups.io <MSG-1@groups.io> On Behalf Of David J Taylor GM8ARV ?????????????? ???? via groups.io
Sent: 02 September 2022 15:42
To: MSG-1@groups.io
Subject: Re: [MSG-1] overlays

On 02/09/2022 11:43, Robert Moore wrote:
David, getting closer: my saved IODC images are in the format 202209010845-msg-ch02.jpg. I attach a (reduced) ch02 image to show that this really was yesterday's Indian Ocean data!

Robert
Well, there's the 40 degree offset! I don't know why, but on the Logs tab, the prolog header shows the rectification longitude, and that should look like the attached i.e. 45.5 degrees. Does it say "from prolog" at the top?

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


David J Taylor GM8ARV 🏴󠁧󠁢󠁳󠁣󠁴󠁿 🇪🇺
 

On 02/09/2022 11:43, Robert Moore wrote:
David, getting closer: my saved IODC images are in the format 202209010845-msg-ch02.jpg. I attach a (reduced) ch02 image to show that this really was yesterday's Indian Ocean data!

Robert
Well, there's the 40 degree offset! I don't know why, but on the Logs tab, the
prolog header shows the rectification longitude, and that should look like the
attached i.e. 45.5 degrees. Does it say "from prolog" at the top?

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


Robert Moore
 

David, getting closer: my saved IODC images are in the format 202209010845-msg-ch02.jpg. I attach a (reduced) ch02 image to show that this really was yesterday's Indian Ocean data!

Robert

-----Original Message-----
From: MSG-1@groups.io <MSG-1@groups.io> On Behalf Of David J Taylor GM8ARV ?????????????? ???? via groups.io
Sent: 02 September 2022 06:51
To: MSG-1@groups.io
Subject: Re: [MSG-1] overlays

On 01/09/2022 22:08, Robert Moore wrote:
David,
My versions as follows:
MDM V3.1.21.1337
GSS V8.2.6.1187

Images still coming through as .... _MSG2_IODC Something wrong there!

On the receiver PC I'm pointing to E1B-GEO-1 'IODC High Rate SEVIRI'

Doc.No. : EUM/OPS-MSG/DOC/22/1284775 does not really clarify matters for me.

So still a bit stuck on this one.
Robert
The versions numbers are fine, Robert. The source files will still say "IODC", but the saved image files should have "iodn" like:

202209020000-iodn-ch09.jpg

It's the "iodn" which tells GeoSatSignal that it's the new - "n" - longitude.
That is determined by a field in the satellite data sent for each segment of the image.

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


David J Taylor GM8ARV 🏴󠁧󠁢󠁳󠁣󠁴󠁿 🇪🇺
 

On 01/09/2022 22:08, Robert Moore wrote:
David,
My versions as follows:
MDM V3.1.21.1337
GSS V8.2.6.1187

Images still coming through as .... _MSG2_IODC
Something wrong there!

On the receiver PC I'm pointing to E1B-GEO-1 'IODC High Rate SEVIRI'

Doc.No. : EUM/OPS-MSG/DOC/22/1284775 does not really clarify matters for me.

So still a bit stuck on this one.
Robert
The versions numbers are fine, Robert. The source files will still say "IODC",
but the saved image files should have "iodn" like:

202209020000-iodn-ch09.jpg

It's the "iodn" which tells GeoSatSignal that it's the new - "n" - longitude.
That is determined by a field in the satellite data sent for each segment of
the image.

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


Robert Moore
 

David,
My versions as follows:
MDM V3.1.21.1337
GSS V8.2.6.1187

Images still coming through as .... _MSG2_IODC
Something wrong there!

On the receiver PC I'm pointing to E1B-GEO-1 'IODC High Rate SEVIRI'

Doc.No. : EUM/OPS-MSG/DOC/22/1284775 does not really clarify matters for me.

So still a bit stuck on this one.
Robert

-----Original Message-----
From: MSG-1@groups.io <MSG-1@groups.io> On Behalf Of David J Taylor GM8ARV ?????????????? ???? via groups.io
Sent: 01 September 2022 14:57
To: MSG-1@groups.io
Subject: Re: [MSG-1] overlays

On 01/09/2022 12:59, Robert Moore wrote:
Thank you David
I will go overlay hunting later. Immediate problem with IODC, I looked at this again and have noticed that (using whole hemisphere image in False Colour) all the longitudes are about 40 degrees out. Horn of Africa is at 5 degrees east and Bay of Bengal at 45 degrees (Dutch coast and Aden - as was). I'm trying to think where I might have gone wrong with settings.
Robert
Robert,

Have you updated GeoSatSignal to the current release. The new Indian Ocean data is only supported in V8.2.6 or later. Note that the image files names now have IODN rather than IODC:

202209010900-iodn-ch09.jpg

You are running the current MSG Data Manager, I trust? V3.1.20?

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


David J Taylor GM8ARV 🏴󠁧󠁢󠁳󠁣󠁴󠁿 🇪🇺
 

On 01/09/2022 12:59, Robert Moore wrote:
Thank you David
I will go overlay hunting later. Immediate problem with IODC, I looked at this again and have noticed that (using whole hemisphere image in False Colour) all the longitudes are about 40 degrees out. Horn of Africa is at 5 degrees east and Bay of Bengal at 45 degrees (Dutch coast and Aden - as was). I'm trying to think where I might have gone wrong with settings.
Robert
Robert,

Have you updated GeoSatSignal to the current release. The new Indian Ocean
data is only supported in V8.2.6 or later. Note that the image files names now
have IODN rather than IODC:

202209010900-iodn-ch09.jpg

You are running the current MSG Data Manager, I trust? V3.1.20?

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


Robert Moore
 

Thank you David
I will go overlay hunting later. Immediate problem with IODC, I looked at this again and have noticed that (using whole hemisphere image in False Colour) all the longitudes are about 40 degrees out. Horn of Africa is at 5 degrees east and Bay of Bengal at 45 degrees (Dutch coast and Aden - as was). I'm trying to think where I might have gone wrong with settings.
Robert

-----Original Message-----
From: MSG-1@groups.io <MSG-1@groups.io> On Behalf Of David J Taylor GM8ARV ?????????????? ???? via groups.io
Sent: 31 August 2022 15:10
To: MSG-1@groups.io
Subject: Re: [MSG-1] overlays

On 29/08/2022 15:33, Robert Moore wrote:
Thanks David,
A_24hr500.gif athttps://ocean.weather.gov/shtml/A_24hr500.gif

I'm sure when I last tried to overlay one of these charts it didn't have the coloured numbers etc but just black and white contours. But the naming is the same. The above chart would be OK, nevertheless.

Robert
Robert,

Colour in the format they supply (4-bit PNG data) I cannot accommodate.

There is new a new beta version here:

https://www.satsignal.eu/software/beta.htm

which handles mid-Atlantic 500mb overlays. I found two, one 24-hour forecast and one 36-hour forecast. Of course, neither overlay the current data perfectly, so if there's a better source please let me know and I might be able to fit it in.

I hope that helps.

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


David J Taylor GM8ARV 🏴󠁧󠁢󠁳󠁣󠁴󠁿 🇪🇺
 

On 29/08/2022 15:33, Robert Moore wrote:
Thanks David,
A_24hr500.gif athttps://ocean.weather.gov/shtml/A_24hr500.gif

I'm sure when I last tried to overlay one of these charts it didn't have the coloured numbers etc but just black and white contours. But the naming is the same. The above chart would be OK, nevertheless.

Robert
Robert,

Colour in the format they supply (4-bit PNG data) I cannot accommodate.

There is new a new beta version here:

https://www.satsignal.eu/software/beta.htm

which handles mid-Atlantic 500mb overlays. I found two, one 24-hour forecast
and one 36-hour forecast. Of course, neither overlay the current data
perfectly, so if there's a better source please let me know and I might be able
to fit it in.

I hope that helps.

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


David J Taylor GM8ARV 🏴󠁧󠁢󠁳󠁣󠁴󠁿 🇪🇺
 

On 29/08/2022 15:33, Robert Moore wrote:
Thanks David,
A_24hr500.gif athttps://ocean.weather.gov/shtml/A_24hr500.gif
I'm sure when I last tried to overlay one of these charts it didn't have the coloured numbers etc but just black and white contours. But the naming is the same. The above chart would be OK, nevertheless.
Robert
Thanks, Robert.

I can take a look at that later tomorrow. Likely the original code was purely for monochrome images, so some work may be required to handle colour. In particular I see that the background is not pure white, so a simple chart/background cannot be used.

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


Robert Moore
 

Thanks David,
A_24hr500.gif at https://ocean.weather.gov/shtml/A_24hr500.gif

I'm sure when I last tried to overlay one of these charts it didn't have the coloured numbers etc but just black and white contours. But the naming is the same. The above chart would be OK, nevertheless.

Robert

-----Original Message-----
From: MSG-1@groups.io <MSG-1@groups.io> On Behalf Of David J Taylor GM8ARV ?????????????? ???? via groups.io
Sent: 29 August 2022 14:45
To: MSG-1@groups.io
Subject: Re: [MSG-1] overlays

On 29/08/2022 12:21, Robert Moore wrote:
One overlay that has eluded me is the 500mb chart on WV images in GSS.
Anyone had any luck with this?

Robert
Robert,

Not something I've tried.

Could you please send me a 500 mb chart in the exact naming convention you use.
If it's in the same projection as the MSLP chart it may be easy to accommodate.

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


David J Taylor GM8ARV 🏴󠁧󠁢󠁳󠁣󠁴󠁿 🇪🇺
 

On 29/08/2022 12:21, Robert Moore wrote:
One overlay that has eluded me is the 500mb chart on WV images in GSS. Anyone
had any luck with this?

Robert
Robert,

Not something I've tried.

Could you please send me a 500 mb chart in the exact naming convention you use.
If it's in the same projection as the MSLP chart it may be easy to accommodate.

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


Robert Moore
 

One overlay that has eluded me is the 500mb chart on WV images in GSS. Anyone had any luck with this?

 

Robert

 

 

From: MSG-1@groups.io <MSG-1@groups.io> On Behalf Of Ernst Lobsiger via groups.io
Sent: 29 August 2022 09:50
To: MSG-1@groups.io
Subject: Re: [MSG-1] Using DWD synoptic overlays (MSLP charts)

 

David and All,

the lcc is a map projection that goes from Polar Stereographic
(used by UKMO, "Bracknell" chart) down to Standard Mercator.
It is a standard projection e.g. used in aviation maps. The very
non standard way is how DWD has choosen their parameter set.
DWD uses lcc close to the above Stereographic. If users accept
certain offsets in coastlines and grid you can try to find a set of
parameters using the UKMO projection but you probably won't
get happy with that. The DWD overlays will be of more interest
with MTG data as they are rather high resolution and there is
also a 3 hourly version with good coverage of western Europe.

You certainly remember winter storm "BARRA". Here is a number
of satpy images with UKMO, OPC and DWD overlays of this event.

https://we.tl/t-dRduJafzgR

wetransfer link, BARRA.zip 178MB (link valid one week from now)


Cheers,
Ernst