[gradsusr] gradsusr Digest, Vol 102, Issue 14
E Mobarak
mobarak_e at yahoo.com
Sat Aug 18 02:32:26 EDT 2018
Dear Charles Langton Vanya Thanks,Your answer is very helpful but it is the othder question about input file for location latitude and longitude, how i write lat andlon value for two different location?
for example:
point 1
lat1=32
lon1=42
pont 2
lat2=34
lon2=42
is it right?
Best regards
On Tuesday, August 14, 2018, 8:32:32 PM GMT+4:30, gradsusr-request at gradsusr.org <gradsusr-request at gradsusr.org> wrote:
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Today's Topics:
1. Re: extract station data (Charles Langton Vanya)
2. Re: extract station data (Walter Arnoldo Bardales Espinoza)
3. Frequency count (ISHIAKU IBRAHIM)
----------------------------------------------------------------------
Message: 1
Date: Mon, 13 Aug 2018 20:22:10 +0200
From: Charles Langton Vanya <dolesibeni at gmail.com>
To: GrADS Users Forum <gradsusr at gradsusr.org>
Subject: Re: [gradsusr] extract station data
Message-ID:
<CA+Y8gxYhSyY+wG5is8UPXA-kkar+pG5iyXzgaLfZ4_3+HL9fGQ at mail.gmail.com>
Content-Type: text/plain; charset="utf-8"
Dear,
I believe you are meaning extracting data from netcdf file.
The best way I do is to average data from a grid box of the area.
The reason for doing this is to make sure that your data is a
representation of the area you are interested inother than just
a single a single point.
This can be in so many ways. But the simolest I can remember is like this:
*****THIS SCRIPT EXTRACT SEA SURFACE TEMPERATURES FOR GRID BOX
**LONG 129E to 131E and LAT 20.0N to 24.0N
'reinit'
'sdfopen C:\fortran\sst\2018sst.nc'
'set x 1'
'set y 1'
** set your area1 here..If your data has high resoultion you can set your
area too closer
lon1 =129.0
lon2 =131.0
lat1 =20.0
lat2 =24.0
** Keep time fixed as below.. Here time is taken as starting from value 1
to 703
** you can also set your time by exactly setting 'set t hhddmmyy'
'set t 1 703'
** Here we are finding areal average of the grid.
'define ssst = aave(sst,lon = 'lon1',lon = 'lon2', lat = 'lat1',lat='lat2')'
** set file name to pring oout... Here we are saving data as 12 month data
table
'fprintf ssst C:\fortran\SST_EXTRACT\DJF\REG2\REG2\R2DJF_SJPAN.txt %g 12 1'
The data is save as a text file and in a single column. If you you want
the data to be extracted as monthly then you use 1 12 instead of 1 1
meaning
that you will have 12 columns representing months of the year.
Hope this helps.
Thank
Regards,
Charles Vanya
On Mon, 13 Aug 2018 at 15:12, Davide Sacchetti <
davide.sacchetti at arpal.gov.it> wrote:
> is file in station data format? if yes use gxout print
>
>
> * From: * E Mobarak <mobarak_e at yahoo.com>
> * To: * <gradsusr at gradsusr.org>
> * Sent: * 8/11/2018 6:09 PM
> * Subject: * [gradsusr] extract station data
>
> Hi
> how i can extract data for some station with different latitude and
> longitude, by loop or function in scripts
> thanks
>
>
> _______________________________________________
> gradsusr mailing list
> gradsusr at gradsusr.org
> http://gradsusr.org/mailman/listinfo/gradsusr
>
> _______________________________________________
> gradsusr mailing list
> gradsusr at gradsusr.org
> http://gradsusr.org/mailman/listinfo/gradsusr
>
--
Meteorological Services
P.O.Box 1808,
Blantyre,
Malawi
Cell:+265-888-980 545
00265111939610
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Message: 2
Date: Mon, 13 Aug 2018 12:58:50 -0600
From: Walter Arnoldo Bardales Espinoza <bardaleswa at gmail.com>
To: GrADS Users Forum <gradsusr at gradsusr.org>
Subject: Re: [gradsusr] extract station data
Message-ID:
<CAKHz5yJqS96-_-tAJMTO_wgy2jBHaqe1CQPnRNwTT_2qr6EOoQ at mail.gmail.com>
Content-Type: text/plain; charset="utf-8"
I share this example, I hope it serves you, I use it to extract the
forecast data of rain and temperatures.
'open wrf_00z.ctl'
* imports a file with the location data of the stations
input='/home/meteorology/Documents/scripts/stations_pptmaxmin.txt'
'set t 2'
'query time'
say result
cdate=subwrd(result,3)
date=substr(cdate,4,12)
cont=1
while(cont<=3)
rec=read(input)
plat=subwrd(rec,3)
plon=subwrd(rec,2)
name_est=subwrd(rec,4)
'set lat 'plat
'set lon 'plon
'd apcpsfc(t=37)-apcpsfc(t=13)'
respuesta=result
lluvias=sublin(respuesta,1)
dpp1=subwrd(lluvias,4)
'd max(tmax2m-273.15,t=14,t=37)'
respuesta=result
tmaxs=sublin(respuesta,2)
tmax1=subwrd(tmaxs,4)
'd min(tmin2m-273.15,t=14,t=37)'
respuesta=result
tmins=sublin(respuesta,2)
tmin1=subwrd(tmins,4)
* Write a file
res=write('/home/meteorology/Documents/data/data_'date'.txt', plon-360'
'plat' 'name_est' 'dpp1' 'tmax1' 'tmin1)
cont=cont+1
endwhile
format of file stations
2018-08-13 12:22 GMT-06:00 Charles Langton Vanya <dolesibeni at gmail.com>:
> Dear,
> I believe you are meaning extracting data from netcdf file.
> The best way I do is to average data from a grid box of the area.
> The reason for doing this is to make sure that your data is a
> representation of the area you are interested inother than just
> a single a single point.
> This can be in so many ways. But the simolest I can remember is like this:
>
> *****THIS SCRIPT EXTRACT SEA SURFACE TEMPERATURES FOR GRID BOX
> **LONG 129E to 131E and LAT 20.0N to 24.0N
>
> 'reinit'
> 'sdfopen C:\fortran\sst\2018sst.nc'
> 'set x 1'
> 'set y 1'
> ** set your area1 here..If your data has high resoultion you can set your
> area too closer
> lon1 =129.0
> lon2 =131.0
> lat1 =20.0
> lat2 =24.0
>
> ** Keep time fixed as below.. Here time is taken as starting from value 1
> to 703
> ** you can also set your time by exactly setting 'set t hhddmmyy'
>
> 'set t 1 703'
> ** Here we are finding areal average of the grid.
>
> 'define ssst = aave(sst,lon = 'lon1',lon = 'lon2', lat =
> 'lat1',lat='lat2')'
>
> ** set file name to pring oout... Here we are saving data as 12 month data
> table
> 'fprintf ssst C:\fortran\SST_EXTRACT\DJF\REG2\REG2\R2DJF_SJPAN.txt %g 12
> 1'
>
> The data is save as a text file and in a single column. If you you want
> the data to be extracted as monthly then you use 1 12 instead of 1 1
> meaning
> that you will have 12 columns representing months of the year.
> Hope this helps.
> Thank
> Regards,
> Charles Vanya
>
> On Mon, 13 Aug 2018 at 15:12, Davide Sacchetti <
> davide.sacchetti at arpal.gov.it> wrote:
>
>> is file in station data format? if yes use gxout print
>>
>>
>> * From: * E Mobarak <mobarak_e at yahoo.com>
>> * To: * <gradsusr at gradsusr.org>
>> * Sent: * 8/11/2018 6:09 PM
>> * Subject: * [gradsusr] extract station data
>>
>> Hi
>> how i can extract data for some station with different latitude and
>> longitude, by loop or function in scripts
>> thanks
>>
>>
>> _______________________________________________
>> gradsusr mailing list
>> gradsusr at gradsusr.org
>> http://gradsusr.org/mailman/listinfo/gradsusr
>>
>> _______________________________________________
>> gradsusr mailing list
>> gradsusr at gradsusr.org
>> http://gradsusr.org/mailman/listinfo/gradsusr
>>
>
>
> --
> Meteorological Services
> P.O.Box 1808,
> Blantyre,
> Malawi
> Cell:+265-888-980 545
> 00265111939610
>
>
> _______________________________________________
> gradsusr mailing list
> gradsusr at gradsusr.org
> http://gradsusr.org/mailman/listinfo/gradsusr
>
>
--
Atte.
Walter Arnoldo Bardales Espinoza
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270.1336111 16.91472222 Flores_aeropuerto__Flores__Pet?n
269.5611111 16.06666667 San_Agust?n_Chixoy__Chisec__Alta_Verapaz
269.1955556 16.80111111 Bethel__La_Libertdad__Pet?n
------------------------------
Message: 3
Date: Mon, 13 Aug 2018 22:04:00 +0100
From: ISHIAKU IBRAHIM <ishiaku.ibrahim at fubk.edu.ng>
To: gradsusr at gradsusr.org
Subject: [gradsusr] Frequency count
Message-ID:
<CAKK-+TSG9z7hsryqd9rd=fvnB+coj9vwmQUcq0CbfT6thkmg4w at mail.gmail.com>
Content-Type: text/plain; charset="utf-8"
Dear GrADS user,
I have netcdf file with daily precipitation data. I intend to find
frequency of days with precipitation value <1 in JUNE, JULY and August
(JJA) months. Can anyone be of help with a script to enable me do this?
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