Combined NOAA-WP-3D flight tracks for all missions flown during TOGA COARE. Red quadrilateral indicates location of IFA. (a) tracks for class 0 (gold) and class 1 (light blue) missions. (b) tracks for class 2 (purple), class 3 (blue) and class 4 (green) missions. Missions that investigated convective systems of more than one class are color coded according to the highest class investigated.