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By E B Pritchard; Mars Exploration Past, Present, and Future Conference. <1991, Williamsburg, Va.>

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Additional info for Mars : past, present, and future; technical papers selected from the Mars Exploration Past, Present and Future Conference, Williamsburg, Virginia, July 1991

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Volume 1: Lander Design," NASA Reference Publ. 1027, Nov. 1980. Purchased from American Institute of Aeronautics and Astronautics This page intentionally left blank Purchased from American Institute of Aeronautics and Astronautics Chapter 6 Viking Mission Overview: Lessons Learned and Challenges for the Future E. A. Euler Martin Marietta Civil Space & Communications, Denver, Colorado 80201 N the 15th anniversary of the Viking landing, it is interesting to focus again on one of the most successful missions ever conducted by NASA.

Since one of the prime scientific objectives was the detection of life on Mars, the biology instrument contained three independent attempts to detect life under varying conditions of water availability. These were pyrolitic release (Horowitz), labeled release (Levine), and gas exchange (Oyama) experiments which were all packaged together in a less than 1-ft3 life detection laboratory. These are described in this chapter. The GCMS (Bieman) was built to determine surface composition and atmospheric gas content but was also relied upon to detect organic matter.

Major advances have been made in electronics, memory technology, computers, and materials. The packing density for electronics has about doubled every 3 years and composites are beginning to replace aluminum structures on many spacecraft. Without doing detail design, a best estimate is made herein as to how these advances could be employed to reduce launch weight and increase landed capability. Other choices are also possible such as increased redundancy, more automated operations, or longer launch windows.

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