Large super pressure balloons have been under development by NASA as a low cost alternative to low Earth orbiting satellites. These pumpkin shaped balloons are planned to be in excess of 60 m in diameter and will cruise above 30,000 m. NASA is developing plans for ground testing a 15 m diameter balloon that is constructed using approximately 200 gores. Data on the deployed shape will be obtained using photogrammery. But the accuracy and quality of the data will depend on the number of cameras used, camera locations and the number of targets located on the balloon’s surface. Photogrammetry simulations are a valuable tool for test planning of large membrane structures such as the ULDB model. The simulations are used to determine the optimum number of cameras, camera locations, target spacing, and expected measurement accuracy. For this study the quality of the simulations was evaluated by comparing data obtained using simulations and actual photogrammetric analysis of a 3 m ULDB model. Once validated the simulations were used to plan the 15 m ULDB ground test. .