[Met_help] [rt.rap.ucar.edu #61228] History for Evaluation of NWP using A-train - or in-situ?

[John Halley Gotway via RT]

----------------------------------------------------------------
  Initial Request
----------------------------------------------------------------

>> Hi,
>>
>> My name is Cecilia and we met at your poster session at EGU a few weeks
>> ago. You had a very nice poster and I am interested in using some of
>> your tools. I checked your website on the Model Evaluation Tools, but I
>> have some questions that you might be able to answer (or maybe knows
>> someone who could help me).
>>
>> Is it possible to use your tools for comparing in-situ measurements from
>> for example a ship track with data from MODIS or any other A-train
>> satellite data? How do I do that? Can I specify the region somewhere? Do
>> I have to upload my in-situ data?
>>
>> If you could give me some first step advice, that would be very much
>> appreciated.
>>
>> Thank you in advance!
>>
>>
>> Kindly Regards,
>>
>> Cecilia Wesslén

----------------------------------------------------------------
  Complete Ticket History
----------------------------------------------------------------

Subject: Evaluation of NWP using A-train - or in-situ?
From: John Halley Gotway
Time: Thu May 02 13:26:13 2013

Hello Cecilia,

I'm one of the developers of the MET software.  I'm happy to help you
get going with using the tools.

Paul Kucera forwarded your email to me, and I created a met_help
support ticket for it.

Based on your email, it sounds like you'd like to compare ship-based
point observation data from MODIS.  In MET, you'd use the "point_stat"
tool to compare gridded data to point observation and compute
statistics.  Typically, the gridded data to be evaluated is gridded
NWP model output, but really there's no reason why your gridded data
couldn't be satellite observation data.

The current version of MET is v4.0, however v4.1 should be released in
the next couple of weeks.  METv4.1 will include a new tools named
"modis2nc".  That tool reads MODIS HDF data, regrids it to the user-
requested grid, and writes out a gridded NetCDF file that the other
MET tools can read.  So that's what I'd suggest for preparing the
MODIS data for use in MET.

For the point data, I assume your ship-based in-situ measurements are
in some ASCII format.  Is that correct?  If so, you could use the
"ascii2nc" tool to reformat and prepare you point observation data for
use in MET.  You'd just need to get your ascii data into the format
expected by ascii2nc.

Then you'd set up a configuration file for the "point_stat" tool
describing the field(s) to verify and type of statistics to compute.

For reference, I'd suggest you take a look at the METv4.0 online
tutorial:
  http://www.dtcenter.org/met/users/support/online_tutorial/METv4.0/index.php

If you need to send me some data, you can post it to our anonymous ftp
site following the instructions here:
   http://www.dtcenter.org/met/users/support/met_help.php#ftp

Hope that helps!

Thanks,
John Halley Gotway
met_help at ucar.edu

------------------------------------------------
Subject: Evaluation of NWP using A-train - or in-situ?
From: John Halley Gotway
Time: Thu May 02 13:27:09 2013

Hello Cecilia,

I'm one of the developers of the MET software. I'm happy to help you
get going with using the tools.

Paul Kucera forwarded your email to me, and I created a met_help
support ticket for it.

Based on your email, it sounds like you'd like to compare ship-based
point observation data from MODIS. In MET, you'd use the "point_stat"
tool to compare gridded data to point observation and compute
statistics. Typically, the gridded data to be evaluated is gridded NWP
model output, but really there's no reason why your gridded data
couldn't be satellite observation data.

The current version of MET is v4.0, however v4.1 should be released in
the next couple of weeks. METv4.1 will include a new tools named
"modis2nc". That tool reads MODIS HDF data, regrids it to the user-
requested grid, and writes out a gridded NetCDF file that the other
MET tools can read. So that's what I'd suggest for preparing the MODIS
data for use in MET.

For the point data, I assume your ship-based in-situ measurements are
in some ASCII format. Is that correct? If so, you could use the
"ascii2nc" tool to reformat and prepare you point observation data for
use in MET. You'd just need to get your ascii data into the format
expected by ascii2nc.

Then you'd set up a configuration file for the "point_stat" tool
describing the field(s) to verify and type of statistics to compute.

For reference, I'd suggest you take a look at the METv4.0 online
tutorial:
http://www.dtcenter.org/met/users/support/online_tutorial/METv4.0/index.php

If you need to send me some data, you can post it to our anonymous ftp
site following the instructions here:
http://www.dtcenter.org/met/users/support/met_help.php#ftp

Hope that helps!

Thanks,
John Halley Gotway
met_help at ucar.edu

------------------------------------------------