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

STS-77 carried out the mission "Spacehab-4". During this flight the crew deployed and retrieved the SPARTAN satellite and deployed the PAMS/STU satellite. Several rendezvous maneuvers with both satellites were performed by the crew of Endeavour.

During the flight the crew performed microgravity research aboard the commercially owned and operated SPACEHAB module. The SPACEHAB single module carried nearly 3,000 pounds (1,400 kg) of experiments and support equipment for 12 commercial space product development payloads in the areas of biotechnology, electronic materials, polymers and agriculture as well as several experiments for other NASA payload organizations. One of these, the Commercial Float Zone Facility (CFZF) was developed through international collaboration between the U.S., Canada, and Germany. It heated various samples of electronic and semiconductor material through the float-zone technique. Another facility on SPACEHAB was the Space Experiment Facility (SEF) which grew crystals by vapor diffusion.