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NASA Mars Orbiter Speeds Past Data Milestone

By R&D Editors | March 9, 2010

NASA Mars Orbiter Speeds Past Data Milestone 

an inverted crater in the Arabia Terra region of Mars

This view of an inverted crater in the Arabia Terra region of Mars is among the images taken by NASA’s Mars Reconnaissance Orbiter in early 2010 as the spacecraft approached the 100-terabit milestone in total data returned. The orbiter’s High Resolution Imaging Science Experiment (HiRISE) camera recorded this image on January 29, 2010, and the spacecraft surpassed 100 terabits about three weeks later.

The inverted crater seen here spans about 250 meters in diameter. Sand in the dark dunes around the crater was probably derived from basalt, a black volcanic rock that is common on Mars. This image covers a swath of ground about 600 meters (about 2,000 feet) wide at about three degrees north latitude, five degrees east longitude. Courtesy of NASA/JPL-Caltech/University of Arizona

NASA’s newest Mars orbiter, completing its fourth year at the Red Planet next week, has just passed a data-volume milestone unimaginable a generation ago and still difficult to fathom: 100 terabits. That 100 trillion bits of information is more data than in 35 hours of uncompressed high-definition video. It’s also more than three times the amount of data from all other deep-space missions combined — not just the ones to Mars, but every mission that has flown past the orbit of Earth’s moon.

“What is most impressive about all these data is not the sheer quantity, but the quality of what they tell us about our neighbor planet,” said Mars Reconnaissance Orbiter Project Scientist Rich Zurek, of NASA’s Jet Propulsion Laboratory. “The data from the orbiter’s six instruments have given us a much deeper understanding of the diversity of environments on Mars today and how they have changed over time.”

The spacecraft entered orbit around Mars on March 10, 2006, following an August 12, 2005, launch from Florida. It completed its primary science phase in 2008 and continues investigations of Mars’ surface, subsurface and atmosphere.

The orbiter sports a dish antenna three meters (10 feet) in diameter and uses it to pour data Earthward at up to six megabits per second. Its science instruments are three cameras, a spectrometer for identifying minerals, a ground-penetrating radar and an atmosphere sounder.

The capability to return enormous volumes of data enables these instruments to view Mars at unprecedented spatial resolutions. Half the planet has been covered at six meters (20 feet) per pixel, and nearly one percent of the planet has been observed at about 30 centimeters (one foot) per pixel, sharp enough to discern objects the size of a desk. The radar, provided by Italy, has looked beneath the surface in 6,500 observing strips, sampling about half the planet.

Among the mission’s major findings is that the action of water on and near the surface of Mars occurred for hundreds of millions of years. This activity was at least regional and possibly global in extent, though possibly intermittent. The spacecraft also has observed that signatures of a variety of watery environments, some acidic, some alkaline, increase the possibility that there are places on Mars that could reveal evidence of past life, if it ever existed.

JPL, a division of the California Institute of Technology, Pasadena, manages the Mars Reconnaissance Orbiter for NASA’s Science Mission Directorate, Washington. Lockheed Martin Space Systems, Denver, is the spacecraft development and integration contractor for the project and built the spacecraft. The Shallow Radar instrument was provided by the Italian Space Agency, and its operations are led by the InfoCom Department, University of Rome “La Sapienza.” Thales Alenia Space Italia, in Rome, is the Italian Space Agency’s prime contractor for the radar instrument. Astro Aerospace of Carpinteria, CA, a business unit of Los Angeles-based Northrop Grumman, developed the instrument’s antenna as a subcontractor to Thales Alenia Space Italia.

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