Selected as an astronaut candidate by NASA in December 1994, Melroy reported to the Johnson Space Center in March 1995. She completed a year of training and evaluation and was qualified for flight assignment as a shuttle pilot. Initially assigned to astronaut support duties for launch and landing, she also worked Advanced Projects for the Astronaut Office. She also performed CAPCOM duties in mission control. Melroy served on the Columbia Reconstruction Team as the lead for the crew module and served as deputy project manager for the Columbia crew survival investigation team. In her final position, she served as branch chief for the Orion branch of the Astronaut Office. Melroy served as pilot on two flights, and was the mission commander on STS-120 in 2007, making her the second woman to command a space shuttle mission. The STS-120 crew visited the station during Expedition 16, commanded by Peggy Whitson. Whitson was the first female ISS commander, making the STS-120 mission the first time that two female mission commanders were in orbit at the same time. She has logged over 924 hours in space.
Spaceflight experience
Discovery was launched from the Kennedy Space Center, Florida and returned to land at Edwards Air Force Base, California. During the 13-day flight, the seven member crew attached the Z1 Truss and Pressurized Mating Adapter 3 to the International Space Station using Discovery's robotic arm and performed four space walks to configure these elements. This expansion of the ISS opened the door for future assembly missions and prepared the station for its first resident crew. The STS-92 mission was accomplished in 202 orbits, traveling 5.3 million miles in 12 days, 21 hours, 40 minutes and 25 seconds. STS-112 Atlantis launched from and returned to land at the Kennedy Space Center, Florida. STS-112 was an International Space Station assembly mission during which the crew conducted joint operations with the Expedition-5 by delivering and installing the S1 Truss. It took three spacewalks to outfit and activate the new component, during which Melroy acted as internal spacewalk choreographer. STS-112 was the first shuttle mission to use a camera on the External Tank, providing a live view of the launch to flight controllers and NASA TV viewers. The mission was accomplished in 170 orbits, traveling 4.5 million miles in 10 days, 19 hours, and 58 minutes. STS-120 Discovery launched from and returned to land at the Kennedy Space Center, Florida. During the mission, the Node 2 element named Harmony was delivered to the International Space Station. This element opened up the capability for future international laboratories to be added to the station. In addition, the P6 Solar Array was re-located from the Z1 Truss to the end of the port side of the Integrated Truss Structure. During the re-deploy of the array, the array panels snagged and were damaged. An unplanned spacewalk was successfully performed to repair the array. The mission was accomplished in 238 orbits, traveling 6.2 million miles in 15 days, 2 hours, and 23 minutes.
Personal life
Melroy is married to Douglas Hollett, a geologist, who is vice president for Southeast Asia exploration at Marathon Oil Corp.