The Mission


Electrostatic Analyzer

Example ESA data illustrating accuracy of in-flight calibrations

THEMIS magnetopause crossing used to test calibrations. From top to bottom: magnetic field, electron spectrogram, ion spectrogram, ion velocity, density, and pressure. Good agreement of the electron (red) and ion (black) densities (panel e) indicates good cross-calibration. Nearly uniform pressure (panel f) across several magnetopause boundaries, on either side of flux transfer events, and within magnetosheath mirror modes, reveals accurate absolute calibrations (from McFadden et al., 2008a).