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Earth, Planets and Space
Fig. 10 | Earth, Planets and Space

Fig. 10

From: Wire Probe Antenna (WPT) and Electric Field Detector (EFD) of Plasma Wave Experiment (PWE) aboard the Arase satellite: specifications and initial evaluation results

Fig. 10

PWE data on April 9, 2017, corresponding to the duration of Fig. 6 of Miyoshi et al. (2017). From the top, HFA spectrum (10 kHz to 10 MHz) (dt: 1 s), OFA-E spectrum (30 Hz to 20 kHz) (dt: 1 s), OFA-B spectrum (30 Hz to 20 kHz) (dt: 1 s), EFD Ev spectrum at 1–224 Hz (dt: 1 s), EFD |E u| (black) and |E v| (red) (dt: 8 s), and EFD spacecraft potential as the average of V u1, V u2, V v1, and V v2 (dt: 8 s) are shown. All data are tentatively calibrated. |E u| and |E v| data include (V spacecraft) × (background magnetic field). The gray-shaded area indicates eclipse. The solid and dashed black lines in the HFA and OFA-E/B panels indicate the local electron cyclotron frequency (f ce) and its half (0.5f ce), respectively, as calculated from the DC magnetic field measurement by MGF. The solid and dashed white lines in the HFA panel indicate the UHR frequency (f UHR) identified from the spectrum and the electron plasma frequency (f pe) derived from the MGF data, respectively

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