An upgraded Soyuz ferry ship, the second in a new series featuring improved avionics, navigation and other systems, glided to a flawless docking with the International Space Station early Friday, bringing three fresh crew members to the outpost and briefly boosting the lab’s crew back to six.

An atmospheric test article of Sierra Nevada Corp.’s Dream Chaser spaceship made a successful runway landing Saturday at Edwards Air Force Base in California after a glide test flight performed to verify the craft’s handling qualities and guidance systems before future resupply missions to the International Space Station.

Crew members on the International Space Station over the weekend continued trying to pinpoint the location of a small air leak in the research outpost’s Russian Zvezda service module, one of the oldest sections of the orbiting laboratory.