Validation of the GOES-8 ABBA was attempted with one prescribed burn in the state of Washington during the Smoke Clouds and Radiation Experiment in California (SCAR-C, 1994) and two prescribed burns in Brazil during SCAR-B (1995). The prescribed burns ranged from 3 to 50 acres in size. Although limited in scope, the results indicated that the GOES-8 can identify fires that are on the order of a few acres in size and that the GOES-8 ABBA sub-pixel size and temperature estimates are within 30 to 40% of ground truth estimates. These case studies also demonstrated the importance of using high temporal resolution data to capture fires as they occur (Menzel and Prins, 1996; Prins et al., 1998). More validation activities are planned for the 1998 fire season in North and South America.