Satellite image characteristics of intense tropical cyclones
Water vapor eye temperatures were found to increase as the storm intensity increased. Although no special rate of intensification per degree of warming was found, water vapor eye temperatures themselves were found to correlate with storm intensities. R Squared values for various storm sets ranged from .60 to .80 for the water vapor eye temperatures vs. the storm intensities. IR eye temperatures for the same sets ranged from .49 to .64. There were problems with using the water vapor eye temperatures. If the eye was too small in diameter, the satellite was unable to view the lower parts of the eye because of the angle of view. Different satellites have narrow and wide band water vapor instruments. The wide band satellites yield warmer eye temperatures. And, there appeared to be major problems after a storm reached maximum intensity.
Finally, tables converting estimated storm intensities from water vapor eye temperatures were derived from trend lines of wide and narrow band storm sets. These were applied to respective band width storms for the full periods of the storms before and after maximum intensity. Average error for the period prior to reaching maximum