ESA's Jupiter Icy Moons Explorer (Juice) has successfully deployed its magnetometer boom (J-MAG), now actively collecting magnetic field data. The initial data suggests a successful deployment with the instrument soon to enter a more detailed commissioning phase. J-MAG will contribute to the study o
and activation of its antennas, booms, sensors, and instruments ongoing over the next months in a dedicated check-out period known as the commissioning phase.Data collected by J-MAG captured the moment of deployment itself.
The plot shows the magnitude of the magnetic field from two sensors, as indicated by the red and turquoise lines, before and during the deployment . The two sensors are mounted on the outer segment of the boom and separated by about 3 m. The labels OBS and IBS indicate the data from the outboard and inboard sensors , respectively. OBS is mounted close to the end of the 10.6 m boom.
The plot lines change as the boom deployment occurs, starting just after 14:29:38 UT and taking approximately two seconds. The plot has been put together using very preliminary calibrations. Detailed instrument commissioning will start next week, including operation in its more sensitive ranges. It will also see the first switch-on of the third J-MAG sensor that will measure the magnetic field magnitude.
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