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[IDV #SWA-509881]: MSG bands 13/14

> Morning Tom (I think ?),

Hi Peter, it's Don.
 
> In the Data Chooser tag of the IDV, for Images, when I connect to Server 
> adde.eumetsat.int
> and select Image Data Type M9, does this send an IMGLIST command to the 
> EUMETSAT ADDE server ?

It sends an ADDE ADIR request (which is what the McIDAS IMGLIST command
sends).  The actual request is:

EUM_AD M9 0  TRACE=0 BAND=ALL X AUX=YES VERSION=1

For any ADDE image server there are generally two types of servers -
an adir (directory) and aget (data) server.  For example, there
is an msgadir.for and msgaget.for in the core McIDAS distribution.
Depending on the type of request (directory or data) one or the
other gets called.  In this case, the adir server needs to fabricate
AREA directories for bands 13 and 14.

> The reason I ask is at this point, the Channel drop down menu becomes active 
> and shows the channels
> available for this Group/Descriptor, and this is where HP cannot select the 
> virtual channels 13 and 14.

Right.  The return from the ADIR request only lists bands that the
server returns.  Currently, it just returns bands 1-11.  We then 
use the returned list to populate the widgets.
 
> If a command is sent, can you tell me which one it is and how I can insert 
> the virtual channel information
> into the Mcidas structure returned by the server to the IDV.

Somewhere in the ADIR server, it generates a list of the available
bands.  It just needs to add in 13 and 14.  Once that happens
an IMGLIST in McIDAS should also show that bands 13 and 14 are 
available.

> Thanks of the support,

Let me know if you need more information.
 
> Peter Miu.
> 
> U-MARF and Internet Software Engineer
> Am Kavalleriesand 31
> 64295 Darmstadt
> Germany
> Tel : +49 6151 807 329
> Fax : +49 6151 807 741
> 
> >>> "Unidata IDV Support" <address@hidden> 07/01/08 20:55 >>>
> Hi HP-
> 
> Happy New Year.  I was off for a couple of weeks so am just now getting
> to this.  I'm also waiting for some fixes from SSEC for your other
> outstanding issues.
> 
> > You might remember my former emails and discussions in June about the
> > virtual channels 13 and 14 from MSG data. Up to now these 2 channels
> > were calculated only by Marianne's server version on my notebook. Up to
> > now I can only see them in McIDAS however. Obviously IDV does not get
> > forwarded with needed information.
> >
> > Pete Miu has now started to implement my local server on
> > adde.eumetsat.int. A first cut of the revised code puts the data into
> > dataset/imagetype M/T. I can see this data stream from my machines, but
> > only channels 1-11 of course because Pete's work is based on my local
> > server. Could you please advise what exactly IDV is expecting from the
> > server in order to link to the data of these 2 channels?
> 
> When a directory (adir) request is made to the server, it needs to
> include those band numbers in the list of bands that it sends
> back. The data server (aget) knows how to interpret BAND= keyword sent
> by McIDAS and calculate the correct data.  The directory server
> (e.g. what IMGLIST talks to) needs to know that it can calculate
> those (and any others) and send them back in the list of available
> bands.
> 
> You can have Peter contact me directly if he needs more specific
> information.
> 
> > In case you will be looking into the data set M/T be aware that the
> > temperature fields (channels 4-11) are wrong for the time being. All
> > other channels/units are correct.
> >
> > Hope you had a good start into 2008. We are expecting the first
> > low-level snow here for Thursday.
> 
> I was in Florida visiting family for Christmas and New Years. We
> had a great time and great weather.
> 
> > HP
> >
> > FYI: Channels 13 and 14 are derived from channel 4 (3.9micron) where the
> > solar and thermal signal respectively, are singled out
> >
> >
> 
> 
> Ticket Details
> ===================
> Ticket ID: SWA-509881
> Department: Support IDV
> Priority: Normal
> Status: Open
> 
> 
> 
> 


Ticket Details
===================
Ticket ID: SWA-509881
Department: Support IDV
Priority: Normal
Status: Open