By R. S. Saunders, R. E. Arvidson, G. D. Badhwar, W. V. Boynton (auth.), Christopher T. Russell (eds.)
Mars, the main liveable of our sister planets, holds a different position in our imaginations and in our house exploration application. absolutely half NASA's planetary exploration attempt is now dedicated to Mars. Key questions comprise: Has Mars ever harbored existence? Is there existence on Mars now? Will people manage to continue to exist at the Martian floor? solutions to those questions lie in opting for the current position of water on Mars and its most probably stock some time past, and in selecting the current radiation atmosphere of Mars. The 2001 Mars Odyssey undertaking contributes significantly those solutions by way of detecting near-surface water via measurements of neutron flux, from the detection of carbonates, and the quantification of its radiation surroundings. This e-book captures the goals, the layout of the venture and the main points of the tools carried to Mars. it may be of curiosity to each scientist drawn to partaking within the on-going exploration of Mars from graduate scholars to senior scientists because it presents the history info necessary to interpret the various interesting effects now showing from the mission.
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Additional resources for 2001 Mars Odyssey
After the final orbit was achieved, the last major spacecraft event before the start of mapping was the deployment of the HGA, which was successfully performed on February 4, 2002. MARS ODYSSEY MISSION 35 References Badhwar, G. : 2004; Martian Radiation Environment Experiment (MARIE), Space Science Reviews, 110, 131-142. Boynton, W. , Feldman, W. , Squyres, S. , Prettyman, T. , Evans, L. , Arnold, J. , Drake, D. , Englert, P. A. , Metzger, A. , Trombka, J. , Hamara, D. , Janes, D. , Taylor, G. : 2002, 'Distribution of Hydrogen in the Near Surface of Mars: Evidence for Subsurface Ice Deposits', Science 297, 81-85, July 5,2002.
The third aerobraking exit maneuver (ABX3), conducted on January 17, 2002, reduced the orbit period and froze the orbit. This lowered apoapsis altitude to 450 km and rotated the argument of periapsis to the South Pole (w = 270°). This maneuver was conducted at apoapsis using a ~ V of 27 mls. Following these three aerobraking exit maneuvers, there were small orbit adjustments as well as the deployment of the high-gain antenna (HGA). Small, final orbit clean-up maneuvers on January 28 and 30, 2002 corrected residual biases and execution errors from the rocket burns associated with the three aerobraking exit maneuvers (ABXl, ABX2 and ABX3).
If this had occurred, the Odyssey spacecraft would have experienced a larger than expected drag force which could have overheated the spacecraft. With warning from TES, the Odyssey mission teams could adjust the height of orbit periapsis, raising Odyssey to a safe height. The THEMIS Mission Operations Team was prepared to turn on THEMIS and support atmospheric monitoring if the TES data were not available. Both the TES and THEMIS Atmospheric Sci- 34 R. S. SAUNDERS ET AL. ence teams supported Odyssey's Atmospheric Advisory Group data interpretation.