Launch from Cape Canaveral (KSC); landing on Edwards AFB.

Second testflight of the Space Shuttle. A first launch attempt had to be delayed because of technical problems and bad weather.

Several scientific experiments including tests with the "Shuttle Imaging Radar" and of the 50-foot remote manipulator arm in space. The planned five day mission was cut, because fuel cell number one failed (producing eletricity and drinking-water). 90 % of mission objectives were achieved. Good results of the OSTA-1 (Office of Space and Terrestical Applications-1) Earth observation experiment, which was mounted in the Spacelab pallet in the payload bay.