Teams also are scanning all the tank’s stringers using a backscatter device, which bounces radiation off the tank allowing engineers to see below the foam insulation. Engineers at various NASA centers continue to analyze testing and imaging data. Managers will meet again Thursday to determine whether radius block modifications are needed on the remaining stringers.
Repairs to four cracks on three stringers on the opposite side of the tank from Discovery that were discovered on Dec. 29 began Monday and are expected to be completed mid-week. The repairs are similar to repairs made on cracks found on two stringers after Discovery's Nov. 5 launch attempt.
The next available launch date for Discovery's STS-133 mission to the International Space Station remains Feb. 3 at the opening of a window that extends through Feb. 10.