[gradsusr] NCEP global SST data and GrADS

[Bill Reilly]

James:

Thanks for your reply.

Attached is the control file (created by Degrib) from the GRIB file: 
ftp://ftpprd.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/sst.20180201/rtgssthr_grb_0.083.grib2

The output fom 'q dims' is:

X is varying   Lon = -179.958 to 180.04   X = 1.00002 to 4321
Y is varying   Lat = -89.958 to 89.9579   Y = 1.00007 to 2160
Z is fixed     Lev = 0  Z = 1
T is fixed     Time = 00Z01FEB2018  T = 1

Another problem is the white gap along the Greenwich Meridian, as you 
can see here: http://www.passageweather.com/maps/neurope/sstc.png, but 
that's a different problem which I'll get to afterwards.

Thanks for your help.

Bill

--

Bill Reilly

(+34) 686-110-748

bill at passageweather.com
www.passageweather.com

On 03/02/2018 03:23, James T. Potemra wrote:
> Bill,
>
> Can you provide the control file?  Or the URL?  If you enter "q dims" 
> it should show the legitimate lat/lon ranges available.  If these show 
> a global range you should be able to plot it.
>
> Jim
>
>
> On 2/2/18 2:38 PM, Bill Reilly wrote:
>> Hello:
>>
>> I'm trying to display the NCEP global SST data using GrADS but I 
>> can't get it to display data across the 180° meridian... It will 
>> either display west of this meridian or east of it, but not both.
>>
>> Using the North Pacific Ocean as an example, I want the plot to go 
>> from 110°E to 80°W.
>>
>> 'set lon 110 280' only displays data WEST of 180°.
>>
>> 'set lon -250 -80' only displays EAST of 180°.
>>
>> 'set lon 110 -80' doesn't display anything.
>>
>> 'set lon 470 640' doesn't display anything.
>>
>> Does anybody have any ideas how to fix this?
>>
>> Thanks,
>>
>> Bill
>>
>> -- 
>>
>> Bill Reilly
>>
>> (+34) 686-110-748
>>
>> bill at passageweather.com
>> www.passageweather.com
>>
>> bill at brwebworks.com
>> www.brwebworks.com
>>
>> _______________________________________________
>> gradsusr mailing list
>> gradsusr at gradsusr.org
>> http://gradsusr.org/mailman/listinfo/gradsusr
>
>

-------------- next part --------------
DSET ^sst.flt
OPTIONS big_endian
OPTIONS yrev
UNDEF 9999.000000
TITLE GrADS control file based on GRIB2 file.
XDEF 4321 LINEAR -179.958333 0.083333
YDEF 2160 LINEAR -89.958000 0.083333
ZDEF 1 LINEAR 0 1
TDEF 1 LINEAR 00:00Z01Feb2018 1MN
VARS 1
TMP 1 99 Temperature [K]
ENDVARS