Space shuttle Discovery‘s astronauts are checking their ship for any signs of launch damage as they steer closer to the international space station for a Sunday linkup.

The routine survey began early Saturday evening and lasted until the wee hours of Sunday.

No fuel tank debris was observed hitting Discovery during Friday’s midnight liftoff, NASA officials say. But the wings and nose, he shuttle’s most vulnerable areas, still needed to be inspected with lasers and cameras on a boom attached to the robot arm. The images were beamed down for analysis.

The early indication was that the survey results looked good even if some of the images got held up because of a digital TV feed problem.

Flight director Tony Ceccacci said, “Nothing stood out that I saw.”

Right before the two crafts meet, the shuttle’s underside will be photographed in detail by the space station residents Sunday night.

(via the Associated Press)