radar data plot

From: Li, Yongzuo <yongzuo.li_at_nyahnyahspammersnyahnyah>
Date: Mon Jan 18 2010 - 20:14:32 MST

Hi Dave,

I have made radar data plot and put it at

ftp://ftp.caps.ou.edu/users/yli/radar/

IDV radar plot is also available there.

Comparing them, NCL plot is not bad anyway.

Now radar data plot problem is absolutely solved.

Yongzuo

From: David Brown [dbrown@ucar.edu]

Sent: Thursday, January 14, 2010 1:17 PM

To: Li, Yongzuo

Cc: Dennis Shea; ncl-talk@ucar.edu

Subject: Re: NCEP stageIV grib data plot

On Jan 14, 2010, at 10:09 AM, Li, Yongzuo wrote:

Dennis,

I made an almost perfect plot

ftp://ftp.caps.ou.edu/users/yli/precip-ncep-stageIV.pdf

using

ftp://ftp.caps.ou.edu/users/yli/ncep-st4.ncl

with

ftp://ftp.caps.ou.edu/users/yli/ST4.2008091307.01h.grib

Questions:

(1) Is my "ZOOM" method good?

(2) The map tilts to right because the center longitude

is -105

res@mpProjection = "Stereographic"

res@mpLimitMode = "Corners"

res@mpCenterLonF = lat2d@Lov

res@mpCenterLatF = 90.

(3) What does lat2d@Lov, the reference longitude, come?

Hi Yongzuo,
The Lov value comes from the grid description in the GRIB file. See the table for polar stererographic grids at:
http://www.nco.ncep.noaa.gov/pmb/docs/on388/tabled.html
-dave

Yongzuo

________________________________________

From: Dennis Shea [shea@ucar.edu]

Sent: Thursday, January 14, 2010 8:54 AM

To: Li, Yongzuo

Cc: ncl-talk@ucar.edu

Subject: Re: NCEP stageIV grib data plot

If you did a

%> ncl_filedump ST4.2008091307.01h.grib

you would see that when NCL reads the grib file it

adds the long_name anf units attributes.

prc = a->A_PCP_GDS5_SFC_acc1h

delete(prc@long_name)

delete(prc@units)

Given your plot, maybe

"NCEP stageIV 1-h precip valid 20080913_"+HH

delete(prc@long_name)

delete(prc@units)

res@gsnCenterString = "1-h precip (mm)"

see gsnCenterString resources at:

http://www.ncl.ucar.edu/Document/Graphics/Resources/gsn.shtml

====

If you want to add a label to the label bar, see

http://www.ncl.ucar.edu/Applications/labelbar.shtml

Example 4

Good Luck

Li, Yongzuo wrote:

> Hi,

>

> I use

>

> ftp://ftp.caps.ou.edu/users/yli/ncep-st4.ncl

>

> to make

>

> ftp://ftp.caps.ou.edu/users/yli/precip-ncep-stageIV.pdf

>

> How can I remove "Total precipitation" and add description to color bar?

>

> I want to add subtitle.

>

> Thanks

>

> Yongzuo

>

>

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Received on Mon Jan 18 20:19:05 2010

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