Primdahl, Fritz5; Brauer, Peter2; Merayo, José M.G.2; Petersen, Jan Raagaard6; Risbo, T.7
1 Solar System Physics, National Space Institute, Technical University of Denmark2 National Space Institute, Technical University of Denmark3 Measurement and Instrumentation Systems, National Space Institute, Technical University of Denmark4 Department of Automation, Technical University of Denmark5 Office for Study Programmes and Student Affairs, Administration, Technical University of Denmark6 Center for Hyperpolarization in Magnetic Resonance, Center, Technical University of Denmark7 unknown
The reference coordinate axes of a magnetic vector field sensor are related to the instrument digital output vector (U) over bar by the calibration matrix C and the offset vector (O) over bar. In addition, this reference coordinate system must be related to (at least) two externally accessible optical or geometrical axes in order to be able to determine the precise orientation of the magnetic coordinate axes in an external reference system. Two methods for determining a reference axis in the sensor coordinates are discussed: (1) using a triaxial coil facility to measure the sensor orientation for two different positions, rotated about a fixed reference axis; (2) in the Earth's field the magnetometer sensor is rotated about a fixed axis into a number of (at least three) positions.
Measurement Science and Technology, 2002, Vol 13, Issue 12, p. 2094-2098