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COTS-Based Wireless Magnetic Sensor for Small Satellites

2010; Institute of Electrical and Electronics Engineers; Volume: 46; Issue: 2 Linguagem: Inglês

10.1109/taes.2010.5461640

2371-9877

Marina Díaz Michelena, Ignacio Arruego, Javier Martinez Oter, H. Guerrero,

Spacecraft Design and Technology

We report on the utilization of a commercial off-the-shelf (COTS) magnetic sensor for the mission NANOSAT-01 and the set of tests that have been developed to up-screen it. The magnetic sensor head is a Wheatstone bridge formed by four anisotropic magnetoresistances (AMR). AMR sensors are an adequate choice for medium- to high-sensitivity (~3 mV/V/G) and resolution (~ 3 ¿G) requirements, mostly due to their low weight and volume that are so interesting for the aerospace industry. The whole system installed in NANOSAT-01 is formed by two biaxial sensors with two redundant PCBs (printed circuit boards) of RAD-HARD proximity electronics, which conditions the AMR output signal, measure the temperature, and resets the AMR. This magnetic sensor belongs to the attitude control system (ACS) of the satellite.