Model predictions of the electromagnetic weather compared to actual observations. Four spherical probes on 3.6 m long wire booms in spin plane. Wire booms wound around satellite body. Measurements are made in 16 sectors in satellite spin plane. Star sensor mounted on stiff axial boom.
Figures Click on any of the small figures below to see a larger version.
The same information as above, but in two polar plots. Schematic picture of the Astrid-2 satellite with all booms and solar panels deployed. Schematic picture of the wire boom deployment mechanism carrying the EMMA electric field probes. The boom unfolds to protrude from the so Detail of satellite showing EMMA electronics box, boom deployment mechanism, nutation damper, and PIA-3 photometer.