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Odyssey Deploys Main Link To Earth

Odyssey's high-gain antenna is 1.3 meters (4.3 feet) in diameter, with a parabolic shape. The antenna can transmit at data rates as high as 110 Kbits per second.
Pasadena (JPL) Feb 6, 2002
NASA's Mars Odyssey spacecraft deployed its high-gain communications antenna last night, marking a major technical milestone prior to the beginning of the science mapping mission.

At 7:29 p.m. Pacific Time, Tuesday, Feb. 5, mission controllers monitored changes in the radio signal from Odyssey, indicating that the release and deployment of the antenna boom were proceeding as planned.

The antenna boom was deployed to its latched position with a motor-driven hinge and locked into place as expected.

The antenna's position is controlled with a two-axis gimbal assembly that allows the spacecraft to communicate with Earth while the science instruments are simultaneously collecting data of Mars.

Overnight, flight controllers checked out the gimbals, which allow the antenna to be pointed in a variety of positions to track Earth.

"Successful deployment of the high gain antenna paves the way for Odyssey to achieve the real payoff of the mission, the science data return," said David A. Spencer, Odyssey's mission manager at NASA's Jet Propulsion Laboratory, Pasadena, Calif.

The science instruments are expected to begin collecting data later this month. Flight controllers first need to test the mapping orientation of the spacecraft, in which the instruments are pointed at Mars while the antenna tracks Earth.

The high-gain antenna is 1.3 meters (4.3 feet) in diameter, with a parabolic shape. The antenna can transmit at data rates as high as 110 Kbits per second.

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NASA's Mars Odyssey spacecraft completed two maneuvers this week, fine-tuning its orbit in preparation for the science mapping mission that will begin in late February.

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In 1979, NASA published Atlas Of Mars, edited by R.M. Batson, P.M. Bridges, and J.L. Inge, of the U.S. Geological Survey in Flagstaff, Arizona. This was a compendium of airbrushed shaded relief maps, controlled photomosaics, and in a few cases albedo (shading) maps, mostly assembled from Mariner 9 survey images, with some gaps filled by Viking orbiter images.

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