The Viking Lander Monitor Mission (VLMM) is well beyond its planned 90-day landed Mars mission. It has been an established NASA goal to maintain an American presence on Mars for as long as possible. With healthy subsystems, the mission could conceivably last until December 5, 1994. At that time the radioisotope thermoelectric generator (RTG) power source output power would be marginal for support of the system electrical loads and for battery maintenance. The antenna pointing coefficients will also expire at that time, resulting in telecommunication system shutdown. Recently three of the four, 8 ampere-hour (AH) nickel-cadmium (NiCd) batteries onboard Viking Lander 1 (VL-1) have indicated signs of significant loss of energy storage capcity. An intensive program of deep-discharge battery reconditioning was begun in January 1982 in an attempt to return the batteries to levels of capacity approaching early mission values.
Final Viking NiCd battery conditioning
Schlusskonditionierung der Viking-Ni/Cd-Batterie
1983
6 Seiten, 2 Bilder, 5 Tabellen, 6 Quellen
Aufsatz (Konferenz)
Englisch
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