Re: Question on plotting GOES IR imagery in NCL

Thanks Rick
to get rid of the blockiness in the GOES IR image I set

cnRasterSmoothingOn = True.

The images are now much smoother. If anyone is interested in seeing
the difference "cnRasterSmoothingOn = True" makes, I can send you
two images for comparison.

saludos,
Dave

On Thu, Apr 24, 2014 at 5:14 PM, David Adams <dave.k.adams@gmail.com> wrote:

> Hi NCLers,
>
> I am plotting GOES IR imagery using goes_2.ncl downloaded
> from http://www.ncl.ucar.edu/Applications/goes.shtml
>
> I have two questions.
>
> 1) The lat/lon coordinates have both y and x dimension, but the brightness
> temperature, d, is just d(time, lat, lon). So if I print, for example,
> print(d(0,300,300)) I get a single temperature value, but I don´t know what
> lat, lon it represents.
>
> This is what is printed out
>
> Variable: d (subsection)
> Type: float
> Total Size: 4 bytes
> 1 values
> Number of Dimensions: 1
> Dimensions and sizes: [1]
> Coordinates:
> Number Of Attributes: 8
> time : 1373746500
> units : K
> coordinates : lon lat
> type : GVAR
> long_name : Temperature
> _FillValue : 255
> lat2d : <ARRAY of 481280 elements>
> lon2d : <ARRAY of 481280 elements>
> (0) 279.2
>
> 279.2 being the temperature value. But what would the lat/lon be?
> I need to make averages over lat/lon boxes, so I need the lat/lon
> represented by these indices.
>
>
> 2) Why is the image produced so blocky looking? The guys at
> SSEC UW plotted the same images with Mc-IDAS at the same resolution and
> their images look smooth. I can pass on the image, if necessary.
>
>
> thanks in advance,
> Dave
>

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Received on Mon Apr 28 10:12:02 2014