Ørsted Satellite Magnetometer

    Description

    Although the contract with the Ørsted consortium has expired by the 1 of January 1996 the magnetometer project has continued throughout 1996, with tests and calibrations. The work has been supported financial by DTU, DSRI and DMI.
    The Ørsted magnetometer sensor was in collaboration with NBI-GA, Copenhagen University calibrated at the coil facility "Magnestrode"at the Technical University in Braunschweig in January 1996. The main purpose of this calibration was to determine the temperature variation of the calibration coefficients as part of the space qualification test of the magnetometer. The result from this calibration proved to be the best ever obtained for a space magnetometer with respect to linearity, stability and drift.The cost of using the the coil facility was covered by the German Space agency DASA.
    The first intercalibration of the magnetometer attitude and the Star Imager attitude as mounted on the optical bench was performed in February at the magnetic observatory in Brorfelde by using the real sky of stars and the known magnetic field of the earth. The data reduction was performed by NBI-GA in collaboration with DTU.
    The assembled Ørsted gondola with the optical bench was thermalvaccum tested in the solar simulator at the institute of spacephysics, Kiruna, Sweden in March 1996.
    As preparation for the final magnetic calibration on satellite level, a system test was performed at the large coil facility at IABG, Munich in June 1996. A number of sensor types was tested apart from the Ørsted CSC-type. From these measurements some general conclusions could be drawn about the sensor linearity.
    The final intercalibration between the magnetometer and the Star Imager was performed in October 1996 at the Table Mountain Observatory owned by Jet Propulsion Laboratory, California, USA. Prior to the intercalibration the gondola was demagnetized at IAU, DTU to minimize the magnetic interference between the two instruments.
    StatusActive
    Effective start/end date01/01/1996 → …