The Ørsted Satellite Project

A Danish Microsatellite With a High Scientific Profile

Papers and reports


ØRSTED CALIBRATION MISSION: THE THIN SHELL METHOD AND SPHERICAL HARMONIC ANALYSIS

 

Risbo, T. (1), P. Brauer (2), J.M.G. Merayo (2), and F. Primdahl (2,3)

 

  1. Copenhagen University, Niels Bohr Institute, Department of Geophysics, Juliane Maries Vej 30, DK-2100 Copenhagen Ø, Denmark.
  2. Technical University of Denmark, Institute of Automation, Building 327, , DK-2800 Lyngby, Denmark.
  3. Danish Space Research Institute, Juliane Maries Vej 30, DK-2100 Copenhagen Ø, Denmark.

 

Abstract. The two sets of axes of a vector compensated magnetometer are defined. The definition of axes is carried over to define the axes of a single axis compensated vector magnetometer in a consistent way. Definitions of vector response, vector cleanliness and deviatoric response of a magnetometer is given. Methods of measurements and evaluation of properties of magnetometers has been developed for use in coil test facilities. The use of coordinate system covariant quantities essential for the consistent definition and use of calibration parameters. The Ørsted vector magnetometer systems capability is evaluated and demonstrated. The Ørsted preflight calibration is described in some detail and finally the need for a absolute scalar standard for in flight calibrations in future magnetic space missions is discussed.