EYE
determination (cont)
ODT analyzes temperatures on
concentric rings (1 pixel wide) centered on the eye between 24 km and 136 km from
the eye location (this range was empirically determined by many observations of coldest ring
radii).
For GOES data with 4km pixel resolution, this results in a
total of 28 rings that
are analyzed to determine the 'surrounding temperature'.
In addition, a continuous ring of cold temperatures surrounding
the eye is more indicative of
an organized (and more intense) storm than one with breaks in the convection.
Therefore, the warmest temperature
found on each ring is identified and stored, with the coldest of these retained as the final
surrounding temp value.
ODT does not reposition the storm center, since it has been
found that the subsequent
analysis of the surrounding temperature field may be improperly influenced by this adjustment in some cases ('false' eyes).