JPL News

Next Leap in Mars Exploration Ready for Launch

NASA's Mars Reconnaissance Orbiter was set for launch today (Aug. 11). The spacecraft is expected to arrive at Mars in March 2006 for a mission to understand the planet's water riddles and to advance the exploration of the mysterious red planet.

The mission's first launch opportunity window was 4:50 to 6:35 a.m. PDT, today. If the launch had to be postponed, additional launch windows would open daily at different times each morning throughout the month, according to the Jet Propulsion Laboratory in La Cañada Flintridge.

For trips from Earth to Mars, the planets move into good position for only a short period every 26 months. The best launch position is when Earth is about to overtake Mars in their concentric racing lanes around the Sun.

"The teams preparing this orbiter and its launch vehicle have done excellent work and kept to schedule. We have a big spacecraft loaded with advanced instruments for inspecting Mars in greater detail than any previous orbiter, and we have the first Atlas V launch vehicle to carry an interplanetary mission. A very potent and exciting combination," said NASA's Mars Exploration Program Director Doug McCuistion.

The mission was to lift off from Launch Complex 41, Cape Canaveral Air Force Station, Fla. It is the first government launch of Lockheed Martin's Atlas V launch vehicle.

"We're ready to fly, counting down through final procedures," said Chuck Dovale, director for expendable-launch-vehicle launches at NASA Kennedy Space Center, Fla.

When the Mars Reconnaissance Orbiter arrives in March, it begins a half-year "aerobraking" process. The spacecraft will gradually adjust the shape of its orbit by using friction from carefully calculated dips into the top of the Martian atmosphere. The mission's primary science phase starts in November 2006.

"Mars Reconnaissance Orbiter will give us several times more data about Mars than all previous missions combined," said James Graf, project manager for the mission at JPL.

Researchers will use the data to study the history and distribution of Martian water. Learning more about what has happened to the water will focus searches for possible past or present Martian life. Observations by the orbiter will also support future Mars missions by examining potential landing sites and providing a communications relay between the Martian surface and Earth.

The craft can transmit about 10 times as much data per minute as any previous Mars spacecraft. This will serve both to convey detailed observations of the Martian surface, subsurface and atmosphere by the instruments on the orbiter and enable data relay from other landers on the Martian surface to Earth. NASA plans to launch the Phoenix Mars Scout in 2007 to land on the far northern Martian surface.

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