Mars Reconnaissance Orbiter
The Mars Reconnaissance Orbiter (MRO) is a spacecraft designed to search for the existence of water on Mars and provide support for missions to Mars, as part of NASA's Mars Exploration Program. It was launched from Cape Canaveral on August 12, 2005, at 11:43 UTC and reached Mars on March 10, 2006, at 21:24 UTC. In November 2006, after six months of aerobraking, it entered its final science orbit and began its primary science phase.
Mission objectives include observing the climate of Mars, investigating geologic forces, providing reconnaissance of future landing sites, and relaying data from surface missions back to Earth. To support these objectives, the MRO carries different scientific instruments, including three cameras, two spectrometers and a subsurface radar. As of July 29, 2023, the MRO has returned over 450 terabits of data, helped choose safe landing sites for NASA's Mars landers, discovered pure water ice in new craters and further evidence that water once flowed on the surface on Mars.[3]
The spacecraft continues to operate at Mars, far beyond its intended design life. Due to its critical role as a high-speed data-relay for ground missions, NASA intends to continue the mission as long as possible, at least through the late 2020s. As of June 27, 2024, the MRO has been active at Mars for 6505 sols, or 18 years, 3 months and 17 days, and is the third longest-lived spacecraft to orbit Mars, after 2001 Mars Odyssey and Mars Express.
Pre-launch[edit]
After the failures of the Mars Climate Orbiter and the Mars Polar Lander missions in 1999, NASA reorganized and replanned its Mars Exploration Program. In October 2000, NASA announced its reformulated Mars plans, which reduced the number of planned missions and introduced a new theme, "follow the water". The plans included the Mars Reconnaissance Orbiter (MRO), to be launched in 2005.[4]
On October 3, 2001, NASA chose Lockheed Martin as the primary contractor for the spacecraft's fabrication.[5] By the end of 2001 all of the mission's instruments were selected. There were no major setbacks during the MRO's construction, and the spacecraft was shipped to John F. Kennedy Space Center on May 1, 2005, to prepare it for launch.[6]