The next three panels show the progression of Ernesto over the 102 hours of the NCAR forecast.  Images on the left are actual satellite photos of the event.  Images on the right were synthesized from the forecast made without GPSRO data, while the images in the center are from the forecast that assimilated the 15 GPSRO profiles.  The elapsed time since the beginning of the forecast is shown on the left-hand images -- in this case, 6 and 30 hours.