NSSDCA ID: 2007-004D-04
Mission Name: THEMIS-DThe Search Coil Magnetometer (SCM) extends magnetometer measurements beyond the 1 Hz range. The instrument was built by the French Centre National d'Etudes des Telecommunications (CETP) following the heritage of GEOS 1&2, Galileo, Ulysses, Cassini, and Freja instruments and it is identical to the one flown on the CLUSTER/STAFF instrument. The triaxial-sensor is mounted on a single-hinge, 1m graphite epoxy boom identical to the one flown on the Lunar Prospector. The signals from the three sensors are pre-amplified and then processed together with EFI data at the FAST-derived IDPU. Absolute amplitude and phase calibration is performed with calibration coils that create a known AC pseudo-random noise consisting of a series of discrete frequencies covering most of the bandwidth (10Hz-8kHz). The science requirements derive from the need to measure with appropriate sensitivity (< 1pT/Hz^0.5 at 10Hz) the cross-field current disruption waves (~0.1 f_LH) at least as close to Earth as 8 RE (f_LH=60Hz).
Questions and comments about this experiment can be directed to: Dr. Dieter K. Bilitza
Name | Role | Original Affiliation | |
---|---|---|---|
Dr. Alain Roux | Co-Investigator | CNRS-Centre de Recherches en Physique de l'Environment Terrestre et Pl | alain.roux@cetp.ipsl.fr |