ISA accelerometer: new configuration and accomodation on the MPO (Mercury Planetary Orbiter)

Details ISA accelerometer: new configuration and accomodation on the MPO (Mercury Planetary Orbiter) ISA accelerometer: new configuration and accomodation on the MPO (Mercury Planetary Orbiter)

Apr 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003eaeja.....5368i&link_type=abstract

EGS - AGU - EUG Joint Assembly, Abstracts from the meeting held in Nice, France, 6 - 11 April 2003, abstract #5368

Computer Science

Performance

Scientific paper

In the ESA CORNERSTONE mission to Mercury, the measurement of the inertial accelerations acting on the MPO (Mercury Planetary Orbiter) is one of the principal task required by the Radio Science Experiments (RSE) aiming to performing planetary measurements (rotation state of Mercury, global structure of its gravity field, local gravitational anomalies) and to test some aspects of the General Relativity. We present an high sensitivity accelerometer named ISA (Italian Spring Accelerometer), developed in our institute with the financial supports of the ASI (Italian Space Agency). The three axis accelerometer has an accuracy of 10^-9 g/sqr(Hz) in a frequency band 10^-4 - 10^-1 Hz. To overcoming the thermal problems and to minimize the effects induced by the dynamic noise in the satellite, due to the angular velocity and angular acceleration, a new configuration of the accelerometer has been implemented. It will be presented the new ISA configuration with the analysis of its performances with particular attentions to its positioning inside the MPO.

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