Physics, Instrumentation and Sensing
Ultra-Sensitive Accelerometry and Space Projects
Microgravity with MicroSTAR
Drawing on experience with the ASTRE accelerometer that was successfully operated on the Columbia space shuttle in 1996 and 1997, DMPH proposes a version of this electrostatic accelerometer that is downscale in size, weight, and power consumption. Called µ-Star, its performance is optimized for measuring the micro-vibratory environment of orbital laboratories, and its use is to be examined by ESA for the European contribution to the international space station.
By its compactness and range of performance, this same instrument is also appropriate for probe requirements for measuring the density and winds of the Martian thermosphere, as is proposed for the Termopac instrument on the Memo mission
(Mars Escape and Magnetic Orbiter). It could also contribute to the aero-capture of certain planetary probes, or be of use in improving autonomous positioning of satellites, with electric propulsion. In addition, it can be used as an angular accelerometer and
combined
with star sensors to improve considerably the fine pointing stability of satellites, especially those flying in formation, as has now been shown by the GRACE satellites.
