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A variation in inductance of a coil caused by a 1 cm movement of a ferrite probe held in the coil and attached to a balanced leaf-spring seismometer causes a variation of 80 MHz in the transmitted signal from the oscillator sensor system at 420 C, which correlates to a 10 kHz mm sensitivity when the ferrite probe is located at the optimum location in the coil. This paper presents progress towards a seismometer sensor with wireless capabilities for Venus applications. Because Venus has an average surface temperature of 462 C and the challenge of providing cooling to multiple seismometers, a high temperature, wireless sensor using a wide bandgap semiconductor is an attractive option. Measuring the seismic activity of Venus is critical to understanding its composition and interior dynamics. Taylor, Brandt Beard, Steve Clougherty, Brian Meredith, Roger D. Due to the short allotted time for its development and low cost, the baseline was to apply the rules of spatial tribology and, when it was possible, to customize existing components for space applications. This paper deals with the mechanisms designed for this seismometer.

The seismometer must be capable of automatic leveling and automatic fitting to the local gravity. The mission requirements lead to very stringent constraints on power, volume, mass and shock resistance at the landing.

Within the framework of the Mars 94 mission, it was decided to design and build a new vertical axis seismometer in order to continuously record the seismic events occurring on the Mars planet.

Paulin, Nicolas Dumas, Pierre Pochard, Marc

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