Atlantis shuttle lands safely in Florida

The space shuttle Atlantis landed safely at Kennedy Space Center in Florida on Wednesday morning, completing a nearly glitch-free 13-day construction mission to the International Space Station.

The seven-man crew delivered and installed the European-built Columbus laboratory module, underscoring the international contribution to the giant metal island floating 220 miles above Earth.

The importance of the mission “is beyond what we accomplished,” said German astronaut Hans Schlegel, after the touchdown at 9:07 a.m. EST.

Installation of the European lab serves as “a role model for international cooperation,” he said.

The landing, with shuttle commander Steve Frick at the controls, went off without a hitch, despite some concerns over a low-lying cloud bank over the central Florida coast.

Rex Walheim, an Air Force colonel making his second trip to the space station, said he was impressed by the sheer size of the station. “It’s great to see how big the station is now,” said Walheim, who helped install a truss segment during his first mission in 2002.

“It really gets your attention” when the station appears in the shuttle windshield before docking, he said. It takes effort now to travel from one end of the station to the other, he added.

With the installation of Columbus, the station is 57% complete, and weighs 567,856 pounds. When construction is complete, the space station will weigh just under a million pounds.

A lot of work remains, however. With less than three years to go before the shuttle fleet is retired, NASA must average four construction missions per year to finish on time. This year, five more are scheduled.

“These missions are extremely challenging, and a great deal of preparation and teamwork are required to get these vehicles ready to fly,” said William Gerstenmaier, NASA’s associate administrator for space operations.

Helping NASA along is the agency’s increasing confidence that engineers at last understand the debris problem that has bedeviled the craft since the loss of Columbia in 2003. The cause of that accident was traced to a chunk of insulating foam that came off the external fuel tank and hit the shuttle’s left wing, tearing a hole in it.

Even after returning to flight, recent shuttle missions have been dominated by concerns that pieces of foam and ice continued to come off the fuel tank during launch. To deal with this problem, engineers redesigned the fuel tank. Exhaustive engineering studies also showed that debris strikes would only be a concern during a narrow time period when atmospheric pressures and acceleration are at their peak.

For Atlantis’ mission, safety officials were able to declare the shuttle safe for landing early in the flight, enabling the crew to turn their full attention to the construction tasks that took place during three spacewalks.

Besides installing the Columbus lab, the Atlantis crew retrieved a failed gyroscope, one of three that keep the station properly oriented in space, and brought it back to Earth.

The crew also brought Daniel Tani home after his three-month stay in space as a member of the space station crew. Left behind at the station was European astronaut Leopold Eyharts.

Ground workers at Kennedy will now begin processing Atlantis for its next mission, an Aug. 28 flight to repair the Hubble Space Telescope.

The next shuttle launch will be the March 11 liftoff of Endeavor. It will attach the Japanese laboratory, called Kibo.

john.johnson@latimes.com