[gradsusr] HRAP precipitation grid

[Jennifer Adams]

Hi, Ryan -- 
I subtracted hrap.xor from 401 and hrap.yor from 1601 and now it seems to fit with this PDEF:
pdef 1051 813 nps 388 1591 -105.000000 4.7625
xdef 1500 linear -135 0.05
ydef 700 linear 20 0.05

Note the new XDEF and YDEF axes do not need to match the size of the original grid; I used 0.05 degrees as a grid increment which kind of matches the native grid size, and made the axes big enough to cover the whole domain:




--Jennifer

On Apr 9, 2014, at 5:14 PM, Maue, Ryan wrote:

> Greetings,
> 
> Does anyone have a control file handy for the netcdf files that are provided by NWS AHPS?  My control file is a little bit off.  The grid is the HRAP 4 km polar stereographic.
> 
> Any help or guidance would be great!
> 
> I've uploaded an example here as well as the ascii output from the conversion program:
> http://models.weatherbell.com/news/nws_precip_conus_20140101.nc
> http://models.weatherbell.com/news/20140101.txt
> 
> Location of the NWS Precip page:
> http://water.weather.gov/precip/
> ​
> dset ^nws_precip_conus_20140101.nc
> dtype netcdf
> title amountofprecip
> undef -1
> pdef 1051 813 nps 401 1601 -105.000000 4.7625
> xdef 1051 linear -131.402908 .06366019047619047619
> ydef 813 linear  20.761557  .04260785837438423645
> ydef 813 linear  20.749580    0.04262164576
> zdef 1 linear 1 1
> tdef 1 linear 00:00Z01jan2014 1dy
> vars 1
> amountofprecip=>pcp  1 y,x amountofprecip
> endvars
> 
> RYAN MAUE
> 
> 
> 
> 
> 
> 
> 
> 
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--
Jennifer M. Adams
Center for Ocean-Land-Atmosphere Studies (COLA)
111 Research Hall, Mail Stop 2B3
George Mason University
4400 University Drive
Fairfax, VA 22030 





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