Question on plotting GOES IR imagery in NCL

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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