GOES LEGEND INFORMATION

SPLIT ENHANCEMENT.—For split enhancements, two ranges are also selected. For each, the complete gray-shade and count value scale applies. This means that the complete gray shade scale is applied twice over the image, except for temperatures lying between the two defined ranges. Figure 1-18 displays a split enhancement curve for temperatures of +30°C to 0°C and -10°C to -30°C. Areas colder than the lower minimum temperature will appear white. Areas warmer than the higher maximum temperature will appear black. Areas which are temperatures between the upper and lower ranges will appear gray. Predefined Enhancement Curves application. One of the most common is the MB Curve. This is a very good, all-purpose curve, but was specifically designed for summertime convective activity. The MB curve has very distinct contours (thresholding) around specific temperatures, and is especially helpful in picking out thunderstorms. Figure 1-19 shows the configuration of the MB curve. The GOES User’s Guide contains detailed information on various predefined enhancement curves. Visible imagery can also be enhanced by adjusting brightness values vice temperature values as with IR imagery. Enhanced visible imagery is especially useful in cases of fog and thick stratus. GOES LEGEND INFORMATION Besides locally developed enhancement curves, Much information about a particular GOES there are several predefined enhancement curves satellite image is available from the GOES legend that available for GOES imagery that have been tested and appears at the top of each image received over the evaluated over many years. Each of these GOES Telecommunications Access Program (GOES- enhancements was developed for a specific TAP). An example of a GOES legend is shown at the Figure 1-18.—Split enhancement curve. 1-18