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The EWO consists of three sets of receivers: EWO-EFD (Electric Field Detector), EWO-WFC/OFA(E) (Wave-Form Capture/Onboard Frequency Analyzer for Electric field), and EWO-WFC/OFA(B) (WFC/OFA for Magnetic field) [Sec.5 of Kasaba et al. (2020a)]. Those receivers observe waveforms and spectra in the frequency range from DC (very low frequency) to 120 kHz for the electric field and from 0.3 Hz to 20 kHz for the magnetic field. The EWO covers the frequency range of various plasma waves in and around the Hermean magnetosphere. The basic design is similar to that of the PWE EWO unit aboard the Arase PWE (Kasahara et al. 2018a; Kasaba et al. 2017).

• DOI: 10.34515/DATA.MMO-XXXXXX　 Level-2 spin-fit electric field data
• DOI: 10.34515/DATA.MMO-XXXXXX 　Level-2 spin-averaged potential data
• DOI: 10.34515/DATA.MMO-XXXXXX　 Level-2 potential waveform data
• DOI: 10.34515/DATA.MMO-XXXXXX　 Level-2 electric field waveform data
• DOI: 10.34515/DATA.MMO-XXXXXX　 Level-2 electric field spectrum data

• Jump to the "Rules of the Road" page for MMO data
• The data user is encouraged to inform to the PWI data team for mistakes, glitches, and problems found in the data. Questions, comments, and any feedback relevant to the data should also be directed to the PWI data team (mmo_pwi_info at isee.nagoya-u.ac.jp).

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• bc_mmo_pwi-efd_l2_Data mode-Date type_YYYYMMDD_rXX-vYY-ZZ.cdf
  • Data mode: low (L), medium (M), and high (H) modes.
  • Date type: E-field (e_spin, e_waveform_pwi, and e_waveform_msm), potential (pot, pot_waveform), and spectrum (spec).
  • Version number:
    • XX: release version
    • YY: major version
    • ZZ: minor version

• MMO_SPACECRAFT (PWI_MEF1, PWI_MEF2, PWI_WPT1, and PWI_WPT2) for no despun data
  • The PWI_MEF1 and PWI_SC frames – MMO_PWI_MEF1 – and – MMO_PWI_SC– are defined as a fixed offset with respect to the MMO_SPACECRAFT frame as follows:
    • +Z axis is nominally co-aligned to the +Zsc axis;
    • +X axis is nominally co-aligned to the +Xsc axis;
    • +Y axis completes the right hand frame;
    • The origin of this frame is located at the geometrical center of the detector.
• MMO_X_SUN_MEAS (MSM) for despun L2 data
  • The MMO Spin Axis Measured frame – MMO_X_SUN_MEAS – is a frame used in the science phase reconstructed CK files. This frame represents MM0_SPACECRAFT when Sun Pulse time is recorded (Phase = 0).
    • Data type
      • e_spin: spin-fitted electric field data
      • e_waveform_msm: waveform data
• Spin phase
  • The spin phase is 0 degree when Sun Sensor is toward Sun.
  • +X: +135 degrees, +Y: +225 degrees, -X: +315 degrees, -Y: +45 degrees when the spin phase is 0 degree.

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