Re: [ldm-users] Reading GOES-16 data?

• To: "Herbster, Christopher G." <herbstec@xxxxxxxx>
• Subject: Re: [ldm-users] Reading GOES-16 data?
• From: Ryan May <rmay@xxxxxxxx>
• Date: Tue, 11 Apr 2017 16:46:53 -0600

Hi,

We currently have re-assembled the tiles on our test server:

http://thredds-test.unidata.ucar.edu/thredds/catalog/satellite/goes16/catalog.html

I wrote a Python script to do the assembly and stripping of header AND
footer directly piped from the LDM. That code is freely available here:

https://github.com/Unidata/ldm-alchemy (look at goes-restitch.py) This runs
only on Python 3.6.

The pqact being used for the data (which runs one instance of the script
for all 16 channels of a particular sector/time) is here:

https://github.com/Unidata/TdsConfig/blob/master/threddsDev/pqacts/pqact.satellite

I don't have any cycles to really support that script, but I haven't
noticed any problems with it on our server.

For the "true color" RGB imagery, you can see a sample of the simple
approach here:

http://nbviewer.jupyter.org/github/Unidata/unidata-python-workshop/blob/master/notebooks/GOES_RGB_Demo/GOES_RGB_Image.ipynb

With the veggie channel, things are too green on land, but otherwise not
too bad. I just wish they would fix the problem where the channel maxing
out ends up set to 0 instead of 255.

Ryan

On Tue, Apr 11, 2017 at 4:00 PM, Herbster, Christopher G. <herbstec@xxxxxxxx
> wrote:

> Hi folks,
>
>
>
> We have our LDM that feeds from our NOAAPort filing the raw tiles for the
> two Visible channels (and the “veggie channel” too).  Our goal was to try
> to build the “true color” images from these three channels.
>
>
>
> We have tried using the chomp.py script that was circulated, but
> regardless of whether we strip those leading bytes off or not, we cannot
> read the files with ncdump, ncl_filedump, or any other tools we have tried.
>
>
>
> What are other people using to decode these files?
>
>
>
> Does anyone know of any existing tools out there to merge/stitch the files
> together?  I found the “cdo” tools, but they cannot read the files that we
> have either.
>
>
>
> Any help or suggestions are greatly appreciated!
>
>
>
> Thanks,
>
> Chris Herbster
>
>
>
> --
>
>
>
> Dr. Christopher G. Herbster
>
> Associate Professor
>
> Director of Science and Technology
>
> for the ERAU Weather Center
>
> Applied Aviation Sciences
>
> Embry-Riddle Aeronautical Univ.
>
> 600 S. Clyde Morris Blvd.
>
> Daytona Beach, FL 32114-3900
>
>  386.226.6444 <(386)%20226-6444> Office
>
> 386.226.6446 <(386)%20226-6446> Weather Center
>
> http://wx.erau.edu/
>
>
>
> Schedule at:  http://wx.erau.edu/faculty/herbster/Schedules/
>
>
>
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-- 
Ryan May, Ph.D.
Software Engineer
UCAR/Unidata
Boulder, CO

• References:
  • [ldm-users] Reading GOES-16 data?
    • From: Herbster, Christopher G.