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Triaxial Fluxgate Magnetometer

NSSDCA ID: 1981-100B-01

Mission Name: UOSAT 1
Principal Investigator:Dr. Mario H. Acuna


The magnetometer provided vector measurements of the earth's magnetic field. The output of the experiment consisted of a vector sample of the field approximately once every second. Each measurement cycle provided three analog signals representing the magnetic field components Bx, By, and Bz, as well as three 16-bit digital versions of these values. The onboard computer was sent a series of seven 10-ms strobe pulses. These seven strobe pulses occurred at 20-ms intervals giving a calibration word and the most significant byte (msb) and the least significant byte (lsb) of the magnetic field components, Bx msb, By msb, Bz msb, Bx lsb, By lsb, and Bz lsb. Thus the complete sample length was 160 ms of each s. Each vector component was represented by 16 bits of which 1 count equaled 2 nT and the dynamic range was 2 to the 15th power. The maximum sample rate at a spacecraft bit rate of 1.2 kbs was 6.25 vector samples per s.

Alternate Names

  • UOSAT1/TriaxialFluxgateMagnetometer


    Additional Information

    Questions and comments about this experiment can be directed to: Coordinated Request and User Support Office



    NameRoleOriginal AffiliationE-mail
    Dr. Mario H. AcunaPrincipal InvestigatorNASA Goddard Space Flight Center
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