[Met_help] [rt.rap.ucar.edu #48226] History for MET Obs ASCII Help.
RAL HelpDesk {for John Halley Gotway}
met_help at ucar.edu
Tue Sep 13 14:40:10 MDT 2011
----------------------------------------------------------------
Initial Request
----------------------------------------------------------------
Juan Camilo,
I see that you recently posted a MET-related question (see below) to the WRF-Users mailing list. I went ahead and cr
eated a MET-Help ticket for this, and wanted to check in to see if you're still have questions about formatting your
data for ASCII2NC. Just let us know - we're happy to help.
Thanks,
John Halley Gotway
met_help at ucar.edu
Hello everyone,
I built a database with information obtained from surface weather
stations (Six months of hourly data); with the following variables,
temperature (2m), relative humidity(2m), wind speed (10m) and wind
direction (10m) percent.
I want to use the MET tool to verify the results of my simulations, but
do not quite understand how to prepare ASCII files for the tool
ASCII2NC. I tried to find an example that can apply to my case but I
have not been successful (Only the example included in the source code)
Does anyone can provide me an example for my case?
Thank you very much.
----------------------------------------------------------------
Complete Ticket History
----------------------------------------------------------------
Subject: MET Obs ASCII Help.
From: camilo.hernandez at gmail.com
Time: Fri Jul 08 10:39:15 2011
John Halley.
Thank you very much for your response.
Of course I'm interested in getting help for my problem.
As we proceed?
On Fri, Jul 8, 2011 at 11:32 AM, RAL HelpDesk {for met_help at ucar.edu}
<
met_help at ucar.edu> wrote:
> Greetings,
>
> This message has been automatically generated in response to the
> creation of a trouble ticket regarding:
> "MET Obs ASCII Help.",
> a summary of which appears below.
>
> There is no need to reply to this message right now. Your ticket
has been
> assigned an ID of [rt.rap.ucar.edu #48226].
>
> Please include the string:
>
> [rt.rap.ucar.edu #48226]
>
> in the subject line of all future correspondence about this issue.
To do
> so,
> you may reply to this message.
>
> Thank you,
> met_help at ucar.edu
>
>
-------------------------------------------------------------------------
> Juan Camilo,
>
> I see that you recently posted a MET-related question (see below) to
the
> WRF-Users mailing list. I went ahead and cr
> eated a MET-Help ticket for this, and wanted to check in to see if
you're
> still have questions about formatting your
> data for ASCII2NC. Just let us know - we're happy to help.
>
> Thanks,
> John Halley Gotway
> met_help at ucar.edu
>
> Hello everyone,
>
> I built a database with information obtained from surface weather
> stations (Six months of hourly data); with the following variables,
> temperature (2m), relative humidity(2m), wind speed (10m) and wind
> direction (10m) percent.
>
> I want to use the MET tool to verify the results of my simulations,
but
> do not quite understand how to prepare ASCII files for the tool
> ASCII2NC. I tried to find an example that can apply to my case but I
> have not been successful (Only the example included in the source
code)
>
> Does anyone can provide me an example for my case?
>
> Thank you very much.
>
>
>
--
JUAN CAMILO HERNÁNDEZ DÍAZ
Investigador Grupo de Ingenieria y Gestion Ambiental GIGA
Ingeniero Sanitario
Universidad de Antioquia
http://www.jkoyo.net
------------------------------------------------
Subject: Re: [rt.rap.ucar.edu #48226] AutoReply: MET Obs ASCII Help.
From: John Halley Gotway
Time: Fri Jul 08 10:59:44 2011
Juan Camilo,
These 2m and 10m forecast fields that you want to verify are actually
treated in a somewhat special way within MET. They are considered
"surface" fields and are matched to any observations that have
a message type of "ADPSFC".
I'd recommend taking the following steps:
(1) If you haven't already done so, please make sure you're using the
latest set of patches for MET, which can be retrieved from here:
http://www.dtcenter.org/met/users/support/known_issues/index.php
Just click on the version you're using, and follow the instructions
at the top of the page for getting "All Recommended Updates".
(2) When you run ASCII2NC, you need to format your ascii point
observations in a certain way. I've listed the 10-column format below
with suggested entries. You will basically create one line in the
ascii file for each observation value you want to use:
- Message_Type: Use "ADPSFC" for these observations to tell MET
that they are surface obs.
- Station_ID: Doesn't really matter but you can put in a name for
each station if you'd like to be able to distinguish between them in
the matched pair output lines (MPR) from Point-Stat
- Valid_Time(YYYYMMDD_HHMMSS): List the date/time of the
observation.
- Lat(Deg North): Latitude of the observing location.
- Lon(Deg East): Longitude of the observing location.
- Elevation(msl): Elevation of the observing location - this isn't
currently used in Point-Stat so you could fill with -9999.
- Grib_Code: Here's you define the observation type based on the
GRIB tables: http://www.nco.ncep.noaa.gov/pmb/docs/on388/table2.html
Enter 11 for temperature in kelvin, 52 for relative humidity,
32 for wind speed in m/s, and 31 for wind direction.
- Level: This doesn't apply for surface observations so just fill
with -9999.
- Height(msl or agl): This doesn't apply for surface observations
so just fill with -9999 or you could put 0, I suppose.
- Observation_Value: The actual observation value for the Grib_Code
you specified for this line. Note that the value should match the
units specified by the GRIB spec.
(3) When you run Point-Stat, you'll set up the configuration file with
entries like this:
fcst_field[] = [ "TMP/Z2", "RH/Z2", "WIND/Z10" ]; // to verify 2-
m temperature and relative humidity and 10-m wind speed
message_type[] = [ "ADPSFC" ];
There are a lot of other settings in the Point-Stat config file that
you can read about.
Regarding wind direction, unfortunately, MET doesn't verify wind
direction directly very well. Once thing you could consider is using
the wind speed and wind direction observations to back out the U
and V components of the wind. Then you could include those U and V
obs in the set of ASCII2NC observations, and you could verify your U
and V model output. There is limited support for verifying
wind direction in Point-Stat and STAT-Analysis, but you have to start
with U and V to do it.
Hopefully this helps you get started. Just let me know if you run
into problems or get stuck.
Thanks,
John Halley Gotway
met_help at ucar.edu
On 07/08/2011 10:39 AM, RAL HelpDesk {for camilo.hernandez at gmail.com}
wrote:
>
> <URL: https://rt.rap.ucar.edu/rt/Ticket/Display.html?id=48226 >
>
> John Halley.
>
> Thank you very much for your response.
>
> Of course I'm interested in getting help for my problem.
>
> As we proceed?
>
>
> On Fri, Jul 8, 2011 at 11:32 AM, RAL HelpDesk {for
met_help at ucar.edu} <
> met_help at ucar.edu> wrote:
>
>> Greetings,
>>
>> This message has been automatically generated in response to the
>> creation of a trouble ticket regarding:
>> "MET Obs ASCII Help.",
>> a summary of which appears below.
>>
>> There is no need to reply to this message right now. Your ticket
has been
>> assigned an ID of [rt.rap.ucar.edu #48226].
>>
>> Please include the string:
>>
>> [rt.rap.ucar.edu #48226]
>>
>> in the subject line of all future correspondence about this issue.
To do
>> so,
>> you may reply to this message.
>>
>> Thank you,
>> met_help at ucar.edu
>>
>>
-------------------------------------------------------------------------
>> Juan Camilo,
>>
>> I see that you recently posted a MET-related question (see below)
to the
>> WRF-Users mailing list. I went ahead and cr
>> eated a MET-Help ticket for this, and wanted to check in to see if
you're
>> still have questions about formatting your
>> data for ASCII2NC. Just let us know - we're happy to help.
>>
>> Thanks,
>> John Halley Gotway
>> met_help at ucar.edu
>>
>> Hello everyone,
>>
>> I built a database with information obtained from surface weather
>> stations (Six months of hourly data); with the following variables,
>> temperature (2m), relative humidity(2m), wind speed (10m) and wind
>> direction (10m) percent.
>>
>> I want to use the MET tool to verify the results of my simulations,
but
>> do not quite understand how to prepare ASCII files for the tool
>> ASCII2NC. I tried to find an example that can apply to my case but
I
>> have not been successful (Only the example included in the source
code)
>>
>> Does anyone can provide me an example for my case?
>>
>> Thank you very much.
>>
>>
>>
>
>
------------------------------------------------
Subject: MET Obs ASCII Help.
From: camilo.hernandez at gmail.com
Time: Wed Jul 13 20:10:30 2011
Thanks for your help
Right now I'm organizing all my data according to the format required
by
MET.
On Fri, Jul 8, 2011 at 11:59 AM, RAL HelpDesk {for John Halley Gotway}
<
met_help at ucar.edu> wrote:
> Juan Camilo,
>
> These 2m and 10m forecast fields that you want to verify are
actually
> treated in a somewhat special way within MET. They are considered
"surface"
> fields and are matched to any observations that have
> a message type of "ADPSFC".
>
> I'd recommend taking the following steps:
>
> (1) If you haven't already done so, please make sure you're using
the
> latest set of patches for MET, which can be retrieved from here:
> http://www.dtcenter.org/met/users/support/known_issues/index.php
> Just click on the version you're using, and follow the
instructions at
> the top of the page for getting "All Recommended Updates".
>
> (2) When you run ASCII2NC, you need to format your ascii point
observations
> in a certain way. I've listed the 10-column format below with
suggested
> entries. You will basically create one line in the
> ascii file for each observation value you want to use:
> - Message_Type: Use "ADPSFC" for these observations to tell MET
that they
> are surface obs.
> - Station_ID: Doesn't really matter but you can put in a name for
each
> station if you'd like to be able to distinguish between them in the
matched
> pair output lines (MPR) from Point-Stat
> - Valid_Time(YYYYMMDD_HHMMSS): List the date/time of the
observation.
> - Lat(Deg North): Latitude of the observing location.
> - Lon(Deg East): Longitude of the observing location.
> - Elevation(msl): Elevation of the observing location - this isn't
> currently used in Point-Stat so you could fill with -9999.
> - Grib_Code: Here's you define the observation type based on the
GRIB
> tables: http://www.nco.ncep.noaa.gov/pmb/docs/on388/table2.html
> Enter 11 for temperature in kelvin, 52 for relative humidity,
32 for
> wind speed in m/s, and 31 for wind direction.
> - Level: This doesn't apply for surface observations so just fill
with
> -9999.
> - Height(msl or agl): This doesn't apply for surface observations
so just
> fill with -9999 or you could put 0, I suppose.
> - Observation_Value: The actual observation value for the
Grib_Code you
> specified for this line. Note that the value should match the units
> specified by the GRIB spec.
>
> (3) When you run Point-Stat, you'll set up the configuration file
with
> entries like this:
> fcst_field[] = [ "TMP/Z2", "RH/Z2", "WIND/Z10" ]; // to verify
2-m
> temperature and relative humidity and 10-m wind speed
> message_type[] = [ "ADPSFC" ];
>
> There are a lot of other settings in the Point-Stat config file that
you
> can read about.
>
> Regarding wind direction, unfortunately, MET doesn't verify wind
direction
> directly very well. Once thing you could consider is using the wind
speed
> and wind direction observations to back out the U
> and V components of the wind. Then you could include those U and V
obs in
> the set of ASCII2NC observations, and you could verify your U and V
model
> output. There is limited support for verifying
> wind direction in Point-Stat and STAT-Analysis, but you have to
start with
> U and V to do it.
>
> Hopefully this helps you get started. Just let me know if you run
into
> problems or get stuck.
>
> Thanks,
> John Halley Gotway
> met_help at ucar.edu
>
>
>
> On 07/08/2011 10:39 AM, RAL HelpDesk {for
camilo.hernandez at gmail.com}
> wrote:
> >
> > <URL: https://rt.rap.ucar.edu/rt/Ticket/Display.html?id=48226 >
> >
> > John Halley.
> >
> > Thank you very much for your response.
> >
> > Of course I'm interested in getting help for my problem.
> >
> > As we proceed?
> >
> >
> > On Fri, Jul 8, 2011 at 11:32 AM, RAL HelpDesk {for
met_help at ucar.edu} <
> > met_help at ucar.edu> wrote:
> >
> >> Greetings,
> >>
> >> This message has been automatically generated in response to the
> >> creation of a trouble ticket regarding:
> >> "MET Obs ASCII Help.",
> >> a summary of which appears below.
> >>
> >> There is no need to reply to this message right now. Your ticket
has
> been
> >> assigned an ID of [rt.rap.ucar.edu #48226].
> >>
> >> Please include the string:
> >>
> >> [rt.rap.ucar.edu #48226]
> >>
> >> in the subject line of all future correspondence about this
issue. To do
> >> so,
> >> you may reply to this message.
> >>
> >> Thank you,
> >> met_help at ucar.edu
> >>
> >>
>
-------------------------------------------------------------------------
> >> Juan Camilo,
> >>
> >> I see that you recently posted a MET-related question (see below)
to the
> >> WRF-Users mailing list. I went ahead and cr
> >> eated a MET-Help ticket for this, and wanted to check in to see
if
> you're
> >> still have questions about formatting your
> >> data for ASCII2NC. Just let us know - we're happy to help.
> >>
> >> Thanks,
> >> John Halley Gotway
> >> met_help at ucar.edu
> >>
> >> Hello everyone,
> >>
> >> I built a database with information obtained from surface weather
> >> stations (Six months of hourly data); with the following
variables,
> >> temperature (2m), relative humidity(2m), wind speed (10m) and
wind
> >> direction (10m) percent.
> >>
> >> I want to use the MET tool to verify the results of my
simulations, but
> >> do not quite understand how to prepare ASCII files for the tool
> >> ASCII2NC. I tried to find an example that can apply to my case
but I
> >> have not been successful (Only the example included in the source
code)
> >>
> >> Does anyone can provide me an example for my case?
> >>
> >> Thank you very much.
> >>
> >>
> >>
> >
> >
>
>
--
JUAN CAMILO HERNÁNDEZ DÍAZ
Investigador Grupo de Ingenieria y Gestion Ambiental GIGA
Ingeniero Sanitario
Universidad de Antioquia
http://www.jkoyo.net
------------------------------------------------
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