The Multi-Magnetometer Facility – for DC magnetic characterisation The position of the magnetometers and the unit under test is accurately determined with a laser system. The AC Magnetic Facility can either be used with a set of 16 triaxial fluxgate sensors (DC - 2 kHz) or with a set of 8 triaxial search coil magnetometers (160 Hz - 50 kHz). The AC Magnetic Facility provides equipment to measure very low quasi-static magnetic fields in the frequency range 0 - 50 kHz and to predict the amplitude spectrum at the point of interest, e.g.the location of the sensitive instrument on the spacecraft. The frequency spectrum is derived from the time series, thus the lower limit on the frequency range is mainly driven by the acquisition duration required to capture the relevant operational mode changes of the unit under test.
#EMC TEST RAPORU VERIFICATION#
This allows rejecting ambient noise substantially and enables verification of demanding requirements for science missions, such as JUICE.
#EMC TEST RAPORU SOFTWARE#
The powered unit under test is placed fixed in a volume defined by 8 or 16 magnetometers and the facility software can discriminate between magnetic sources inside or outside this volume using spherical harmonic expansion models and Gaussian separation into inner and outer sources.
The AC Magnetic Facility allows the determination of low frequency magnetic emissions in time and frequency domain. The AC Magnetic Facility – for low frequency AC magnetic field measurements During rotational measurements, the magnetometers are oversampled synchronously at a typical 10 kHz frequency the signals are then filtered and decimated to obtain an angular resolution of 1 degree and an effective amplitude resolution in the order of 100 pT as inputs to the optimisation algorithms. The MCF consists of two pairs of squared Helmholtz coils for the open loop compensation of the ambient magnetic field, one pair of perm/deperm coils connected to a 4-quadrant amplifier, four 3-axis magnetometers (100 μT range), a turntable with motor drive and a computer for command, control, data processing and production of automatic test reports.
The MCF enables missions requiring tight magnetic cleanliness control (Swarm, BepiColombo, Solar Orbiter, JUICE, LISA).
It can also be used for the measurement of induced magnetic moment as a function of the applied field (up to 100 μT) and for the magnetisation and demagnetisation (perm / deperm) of parts and units, compliant to the ECSS-E-ST-20-07C. The Mobile Coil Facility (MCF) provides services for rotational measurement and multiple dipole modelling of the remanent magnetisation of units under test, in near-real time, using advanced non-linear optimisation algorithms. The Mobile Coil Facility – for DC magnetic characterisation and degaussing
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