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| public:chspubwiki:bcmmo:pwiofa:start [2026/03/23 12:02] – created chae-woo_isee.nagoya-u.ac.jp | public:chspubwiki:bcmmo:pwiofa:start [2026/03/23 17:18] (current) – chae-woo_isee.nagoya-u.ac.jp |
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| ====== Wiki for Onboard Frequency Analyzer (OFA)-Plasma Wave Investigation (PWI) onboard BepiColombo Mercury Magnetospheric Orbiter (BC/MMO) ====== | ====== Wiki for Onboard Frequency Analyzer (OFA)-Plasma Wave Investigation (PWI) onboard BepiColombo Mercury Magnetospheric Orbiter (BC/MMO) ====== |
| {{:public:chspubwiki:bcmmo:spm:bcmmo_spm_snapshot1.png?500}} \\ | {{:public:chspubwiki:bcmmo:pwiofa:pwi_sorbet.png?500}}\\ |
| 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). | 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). |
| | ------------- |
| |
| ===== Members ===== | ===== Members ===== |
| === Instrument team === | ==== Instrument team ==== |
| * Yasumasa Kasaba (Tohoku University, Japan) | * Yasumasa Kasaba (Tohoku University, Japan) |
| * Hirotsugu Kojima (Kyoto University, Japan) | * Hirotsugu Kojima (Kyoto University, Japan) |
| * Satoshi Yagitani (Kanazawa University, Japan) | * Satoshi Yagitani (Kanazawa University, Japan) |
| * Shoya Matsuda (Kanazawa University, Japan) | * Shoya Matsuda (Kanazawa University, Japan) |
| === Data contact at Mio-SC === | ==== Data contact at Mio-SC ==== |
| * Chae-Woo Jun (CHS, ISEE, Nagoya Univ., Japan) | * Chae-Woo Jun (CHS, ISEE, Nagoya Univ., Japan) |
| * Tomoaki Hori (CHS, ISEE, Nagoya Univ., Japan) | * Tomoaki Hori (CHS, ISEE, Nagoya Univ., Japan) |
| |
| ===== Instrument Specifications ===== | ===== Instrument Specifications ===== |
| * A pair of two identical pariticle monitors (SPM1 and SPM2) employing a 10 mm x 10 mm x 0.3 mm solid state dector (SSD) | * |
| * The energy range: >70 keV (as deposited energy, not incident energy) | |
| ===== Data release/version history ===== | ===== Data release/version history ===== |
| * TBD: the first release of Lv.2pre data (data ver.: r01-v03-00) to registered users. | * TBD: the first release of Lv.2pre data (data ver.: r01-v03-00) to registered users. |
| ===== Calibration Information ===== | ===== Calibration Information ===== |
| * | * |
| | |
| ===== Science Data Products ===== | ===== Science Data Products ===== |
| |
| | ==== Level-2pre (cruise phase) data products ==== |
| |
| ==== ==========Level-2pre (cruise phase) data products========== ==== | === File name convention === |
| * Would be reasonable to generate **two** types of spectral data sets (in CDF): | * bc_mmo_pwi-ofa_l2p_**Data mode**-spec-**Observation mode**_YYYYMMDD_rXX-vYY-ZZ.cdf |
| - **Data resolution**: low (L), medium (M), and high (H) modes. | * **Data mode**: low (L), medium (M), and high (H) modes. |
| - **Observation region**: magnetosphere (MS) and solar wind (SW) modes. | * **Observation mode**: magnetosphere (MS) and solar wind (SW) modes. |
| * Each dataset includes at least the following data variables. | * Version number: |
| | * XX: release version |
| | * YY: major version |
| | * ZZ: minor version |
| |
| === Level-2pre OFA (B) Data (calibrated B field) === | === Level-2pre OFA (B) Data (calibrated B field) === |
| | * For L-mode, |
| | * AA:18, 36, 72 pts |
| | * Nominal time resolutions: 2-8 sec |
| | * For M-mode, |
| | * AA: 90, 180, 360 pts |
| | * Nominal time resolution: 1-8.3 sec |
| | |
| | ^ Variable name ^ Description ^ Dimension ^ Remarks ^ |
| | | epoch_bAA | Time labels in TIME_TT2000, at the center of each data accumulation period (bAA) | (time) | | |
| | | epoch_eAA | Time labels in TIME_TT2000, at the center of each data accumulation period (eAA) | (time) | | |
| | | strtime_epoch | epoch values in YYYY-MM-DDThh:mm:ss.fff format. | (time) | | |
| | | epoch_delta1_bAA | Time diff. from the data accumulation start to epoch (bAA) | (time) | | |
| | | epoch_delta1_eAA | time diff. from the data accumulation start to epoch (eAA) | (time) | | |
| | | epoch_delta2_bAA | time diff. from epoch to the data accumulation end (bAA) | (time) | | |
| | | epoch_delta2_eAA | time diff. from epoch to the data accumulation end (eAA) | (time) | | |
| | | mdp_ti_bAA | TI values provided by MDP (bAA) | (time) | | |
| | | mdp_ti_eAA | TI values provided by MDP (eAA) | (time) | | |
| | | spec_Babs_AA | the magnetic field spectrum data with AA pts frequency channels | (time,freq_bAA) | | |
| | | spec_Eabs_AA | the electric field spectrum data with AA pts frequency channels | (time,freq_eAA) | | |
| | | freq_bAA | Frequency array (b_AA) | (freq_bAA) | | |
| | | freq_eAA | Frequency array (e_AA) | (freq_eAA) | | |
| | | bandwidth_bAA | Bandwidth array (b_AA) | (freq_bAA) | | |
| | | bandwidth_eAA | Bandwidth array (e_AA) | (freq_eAA) | | |
| | | quality_flag | quality flags for the data values | (time) | | |
| |
| For L-mode, | |
| ^ Variable name ^ Description ^ Dimension ^ Nominal Time Resolution ^ Remarks ^ | |
| | epoch_b18 | Time labels in TIME_TT2000, at the center of each data accumulation period (b18) | (time) | | | |
| | epoch_b72 | Time labels in TIME_TT2000, at the center of each data accumulation period (b72) | (time) | | | |
| | epoch_e18 | Time labels in TIME_TT2000, at the center of each data accumulation period (e18) | (time) | | | |
| | epoch_e72 | Time labels in TIME_TT2000, at the center of each data accumulation period (e72) | (time) | | | |
| | strtime_epoch | epoch values in YYYY-MM-DDThh:mm:ss.fff format. | (time) | | | |
| | epoch_delta1_b18 | Time diff. from the data accumulation start to epoch (b18) | (time) | | | |
| | epoch_delta1_b72 | time diff. from the data accumulation start to epoch (b72) | (time) | | | |
| | epoch_delta1_e18 | time diff. from the data accumulation start to epoch (e18) | (time) | | | |
| | epoch_delta1_e72 | time diff. from the data accumulation start to epoch (e72) | (time) | | | |
| | epoch_delta2_b18 | time diff. from epoch to the data accumulation end (b18) | (time) | | | |
| | epoch_delta2_b72 | time diff. from epoch to the data accumulation end (b72) | (time) | | | |
| | epoch_delta2_e18 | time diff. from epoch to the data accumulation end (e18) | (time) | | | |
| | epoch_delta2_e72 | time diff. from epoch to the data accumulation end (e72) | (time) | | | |
| | mdp_ti_b18 | TI values provided by MDP (b18) | (time) | | | |
| | mdp_ti_b72 | TI values provided by MDP (b72) | (time) | | | |
| | mdp_ti_e18 | TI values provided by MDP (e18) | (time) | | | |
| | mdp_ti_e72 | TI values provided by MDP (e72) | (time) | | | |
| | spec_Babs_18 | the magnetic field spectrum data (time res. = 2 sec) with 18 pts frequency channels | (time,freq_b18) | | | |
| | spec_Babs_72 | the magnetic field spectrum data (time res. = 8 sec) with 72 pts frequency channels | (time,freq_b72) | | | |
| | spec_Eabs_18 | the electric field spectrum data (time res. = 2 sec) with 18 pts frequency channels | (time,freq_e18) | | | |
| | spec_Eabs_e72 | the electric field spectrum data (time res. = 8 sec) with 72 pts frequency channels | (time,freq_e72) | | | |
| | freq_b18 | Frequency array (b_18) | (freq_b18) | | | |
| | freq_b72 | Frequency array (b_72) | (freq_b72) | | | |
| | freq_e18 | Frequency array (e_18) | (freq_e18) | | | |
| | freq_e72 | Frequency array (e_72) | (freq_e72) | | | |
| | bandwidth_b18 | Bandwidth array (b_18) | (freq_b18) | | | |
| | bandwidth_b72 | Bandwidth array (b_72) | (freq_b72) | | | |
| | bandwidth_e18 | Bandwidth array (e_18) | (freq_e18) | | | |
| | bandwidth_e72 | Bandwidth array (e_72) | (freq_e72) | | | |
| | quality_flag | quality flags for the data values | (time) | | | |
| |
| For M-mode, | ===== Data Inventory (Data Archive Status) ===== |
| ^ Variable name ^ Variable type ^ dimension ^ content ^ | * Data repository: TBD |
| | epoch_b90 | TIME_TT2000 | (time) | time labels in TIME_TT2000, at the center of each data accumulation period (b18) | | |
| | epoch_b360 | TIME_TT2000 | (time) | time labels in TIME_TT2000, at the center of each data accumulation period (b72) | | |
| | epoch_e90 | TIME_TT2000 | (time) | time labels in TIME_TT2000, at the center of each data accumulation period (e18) | | |
| | epoch_e360 | TIME_TT2000 | (time) | time labels in TIME_TT2000, at the center of each data accumulation period (e72) | | |
| | strtime_epoch | STRING | (time) | epoch values in YYYY-MM-DDThh:mm:ss.fff format. This may be required for PDS. | | |
| | epoch_delta1_b90 | REAL4 | (time) | time diff. from the data accumulation start to epoch (b90) | | |
| | epoch_delta1_b360 | REAL4 | (time) | time diff. from the data accumulation start to epoch (b360) | | |
| | epoch_delta1_e90 | REAL4 | (time) | time diff. from the data accumulation start to epoch (e90) | | |
| | epoch_delta1_e360 | REAL4 | (time) | time diff. from the data accumulation start to epoch (e360) | | |
| | epoch_delta2_b90 | REAL4 | (time) | time diff. from epoch to the data accumulation end (b90) | | |
| | epoch_delta2_b360 | REAL4 | (time) | time diff. from epoch to the data accumulation end (b360) | | |
| | epoch_delta2_e90 | REAL4 | (time) | time diff. from epoch to the data accumulation end (e90) | | |
| | epoch_delta2_e360 | REAL4 | (time) | time diff. from epoch to the data accumulation end (e360) | | |
| | mdp_ti_b90 | UINT4 | (time) | TI values provided by MDP (b90) | | |
| | mdp_ti_b360 | UINT4 | (time) | TI values provided by MDP (b360) | | |
| | mdp_ti_e90 | UINT4 | (time) | TI values provided by MDP (e90) | | |
| | mdp_ti_e360 | UINT4 | (time) | TI values provided by MDP (e360) | | |
| | spec_By_90 | REAL4 | (time,freq_b90) | the magnetic field spectrum data for By component (time res. = 1 sec) with 90 pts frequency channels | | |
| | spec_Bz_90 | REAL4 | (time,freq_b90) | the magnetic field spectrum data for Bz component (time res. = 1 sec) with 90 pts frequency channels | | |
| | spec_Ex_90 | REAL4 | (time,freq_e90) | the electric field spectrum data for Ex component (time res. = 1 sec) with 90 pts frequency channels | | |
| | spec_Ey_90 | REAL4 | (time,freq_e90) | the electric field spectrum data for Ey component (time res. = 1 sec) with 90 pts frequency channels | | |
| | spec_By_360 | REAL4 | (time,freq_b360) | the magnetic field spectrum data for By component (time res. = 8.3 sec) with 360 pts frequency channels | | |
| | spec_Bz_360 | REAL4 | (time,freq_b360) | the magnetic field spectrum data for Bz component (time res. = 8.3 sec) with 360 pts frequency channels | | |
| | spec_Ex_360 | REAL4 | (time,freq_e360) | the electric field spectrum data for Ex component (time res. = 8.3 sec) with 360 pts frequency channels | | |
| | spec_Ey_360 | REAL4 | (time,freq_e360) | the electric field spectrum data for Ey component (time res. = 8.3 sec) with 360 pts frequency channels | | |
| | freq_b90 | REAL4 | (freq_b90) | Frequency array (b_90) | | |
| | freq_b360 | REAL4 | (freq_b360) | Frequency array (b_360) | | |
| | freq_e90 | REAL4 | (freq_e90) | Frequency array (e_90) | | |
| | freq_e360 | REAL4 | (freq_e360) | Frequency array (e_360) | | |
| | bandwidth_b90 | REAL4 | (freq_b90) | Bandwidth array (b_90) | | |
| | bandwidth_b360 | REAL4 | (freq_b360) | Bandwidth array (b_360) | | |
| | bandwidth_e90 | REAL4 | (freq_e90) | Bandwidth array (e_90) | | |
| | bandwidth_e360 | REAL4 | (freq_e360) | Bandwidth array (e_360) | | |
| | quality_flag | UINT1 | (time) | quality flags for the data values | | |
| |
| | ^ Dataset name ^ Processed from ^ Latest CDF version ^ Remarks ^ |
| | | Level2 pre Spec CDF | TBD | r01-v03-00 | | |
| |
| ---- | -------- |
| * [[public:chspubwiki:bcmmo:start|Parent page]] | * [[public:chspubwiki:bcmmo:start|Parent page]] |
| * [[https://miosc.isee.nagoya-u.ac.jp/about/satellite/spm.php|the SPM page on the Mio-SC website]] | * [[https://miosc.isee.nagoya-u.ac.jp/about/satellite/pwi.php|The PWI page on the Mio-SC website]] |
| | * [[https://miosc.isee.nagoya-u.ac.jp/about/satellite/pwi_ewo.php|The PWI-EWO page on the Mio-SC website]] |
