[Met_help] [rt.rap.ucar.edu #73527] History for MET-TC Intensity questions

[John Halley Gotway via RT]

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  Initial Request
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Hello,
I have questions for MET-TC.
When I try to gain the intensity errors, do I have to use
AMAX_WIND-BMAX_WIND?
Because I don't have AMAX_WIND information for some MODEL ouput. Is
AMSLP-BSMSLP also same meaning for intensity errors?

And when I try to gain the abs(AMSLP-BMSLP) it shows this sentences. (In
MET-TC user guide, I saw the abs( AMAX_WIND-BMAX_WIND) is used to Intensity
errors.)

  -bash: syntax error near unexpected token `('

How can I do?

Best,
Sujeong

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  Complete Ticket History
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Subject: MET-TC Intensity questions
From: John Halley Gotway
Time: Thu Sep 24 09:57:06 2015

Sujeong,

I've attached a sample data file to this message.  It's named
"alal2010.tcst" and contains some sample output from the MET tc_pairs
tool
for the Atlantic Hurricane basin in 2010.   Please save that file to
your
local machine and try running the following tc_stat jobs on the
command
line:

   tc_stat -lookin alal2010.tcst -job summary -column
AMAX_WIND-BMAX_WIND,ABS\(AMAX_WIND-BMAX_WIND\),AMSLP-BMSLP,ABS\(AMSLP-
BMSLP\)

This job reads that data file and computes 4 summary output columns...
the
wind difference, the pressure difference, and their absolute values.
Notice that I "escaped" the parenthesis on the command line by putting
a
backslash \ in front of them.  The parenthesis are special characters
in
Unix and need to escaped when used on the command line like this.

You should see 4 lines of summary output from tc_stat.  Notice that
there's
no valid data for the pressure difference.  That's because the AMSLP
column
is all missing data in that file, and so AMSLP-BMSLP results in
missing
data as well.

Now try running the same job, but add "-by AMODEL".  That'll give you
same
type of output but it'll be split out for each unique entry in the
AMODEL
column.  Instead of 4 lines of summary output, you should now have 44.

Then rerun the same job, but add "-by AMODEL,LEAD"... which should
give you
492 lines of summary output, which is 1 line for each unique
combination of
model name and lead time.

Hopefully that'll help get you going.  Feel free to play around with
the
"-by" option to subset your output in whatever way makes sense to you.

Please also take a look at the file named met-
5.0/data/config/README_TC.
It describes some shortcuts to getting several output statistics from
tc_pairs.  Specifying the "-column" option as TRACK, WIND, TI, AC, and
XY
gives you some predefined groupings of output.

Thanks,
John Halley Gotway
met_help at ucar.edu

On Thu, Sep 24, 2015 at 12:33 AM, Sujeong Lim via RT
<met_help at ucar.edu>
wrote:

>
> Thu Sep 24 00:33:14 2015: Request 73527 was acted upon.
> Transaction: Ticket created by sjlim1202 at gmail.com
>        Queue: met_help
>      Subject: MET-TC Intensity questions
>        Owner: Nobody
>   Requestors: sjlim1202 at gmail.com
>       Status: new
>  Ticket <URL:
https://rt.rap.ucar.edu/rt/Ticket/Display.html?id=73527 >
>
>
> Hello,
> I have questions for MET-TC.
> When I try to gain the intensity errors, do I have to use
> AMAX_WIND-BMAX_WIND?
> Because I don't have AMAX_WIND information for some MODEL ouput. Is
> AMSLP-BSMSLP also same meaning for intensity errors?
>
> And when I try to gain the abs(AMSLP-BMSLP) it shows this sentences.
(In
> MET-TC user guide, I saw the abs( AMAX_WIND-BMAX_WIND) is used to
Intensity
> errors.)
>
>   -bash: syntax error near unexpected token `('
>
> How can I do?
>
> Best,
> Sujeong
>
> --
>
>

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