ErgSat/Lepi

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Low-Energy Particle Experiments - Ion Mass Analyzer (LEP-i)

Members

  • PI
    • Kazushi Asamura(JAXA)


Rules of the Road

  • For the general data policy for the ERG satellite, please refer to this webpage.
  • === Rules of the Road of LEP-i Level 2 data ===

Detail of the instrument can be found in the special issue of Earth, Planets and Space, doi:10.1186/s40623-018-0846-0. Further information on the data can be found at the following wiki page:

https://ergsc.isee.nagoya-u.ac.jp/mw/index.php/ErgSat/Lepi

If you have any questions, comments, and feedback relevant to the data, please send them to the LEPi team (E-mail: erg_lepi_info at isee.nagoya-u.ac.jp).


Updates on the Instrument Status, Data, Calibration, and Notes

  • mass table for CNT has been updated after 08:00UTC on Jan. 15, 2018.
  • MCP bias voltage was changed at 17:44UTC on Feb 22, 2018


Past articles archived here

Instrument Specifications

  • Detail of the instrument can be found in the special issue of Earth, Planets and Space, doi:10.1186/s40623-018-0846-0.

Observation Modes

  • CNT
  • TOF (outbound pass every 4 revolutions)


Observation Mode Changes

  • 2017/04 - 2017/09/04
* CNT observations
 * 32 sec 
* TOF observations
 * 16sec         
 * outbound pass every 4 revolutions.
  • 2017/09/05 - 2018/02/05
* CNT observations
 * 8 sec at L>4 MLAT<30
 * 16 sec 
* TOF observations
 * 16sec         
 * outbound pass every 4 revolutions.
  • 2018/02/05 - present
* CNT observations
 * 8 sec at L>4.5 
 * 32 sec 
* TOF observations
 * 16sec         
 * outbound pass every 4 revolutions.

Calibration Information

Science Data Products

3-D flux data (12 Coarse Channels) (data file name: erg_lepi_l2_3dflux_YYYYMMDD_vAA_BB.cdf)
Name Description Unit Dimension Nominal Time Resolution Data Load Routine for SPEDAS
Epoch Time at the beginning of spin sector seconds (time) 8s erg_load_lepi_nml
3dflux_FPDU Unidirectional differential proton number flux /cm2 sec str keV (time)x32(energy)x8(sensor channel:0-7)x16(spin phase) 8s erg_load_lepi_nml
3dflux_FPDU_sub Unidirectional differential proton number flux /cm2 sec str keV (time)x32(energy)x7(sensor channel:8-e)x16(spin phase) 8s erg_load_lepi_nml
3dflux_FPEDU Unidirectional differential proton energy flux keV/cm2 sec str keV (time)x32(energy)x8(sensor channel:0-7)x16(spin phase) 8s erg_load_lepi_nml
3dflux_FPEDU_sub Unidirectional differential proton energy flux keV/cm2 sec str keV (time)x32(energy)x7(sensor channel:8-e)x16(spin phase) 8s erg_load_lepi_nml
3dflux_FPDU_COUNT_RAW Raw proton count 1/sample (time)x32(energy)x8(sensor channel:0-7)x16(spin phase) 8s erg_load_lepi_nml
3dflux_FPDU_COUNT_RAW_sub Raw proton count 1/sample (time)x32(energy)x7(sensor channel:8-e)x16(spin phase) 8s erg_load_lepi_nml
3dflux_FPDU_Quality Quality flag for each energy bin and channel (time)x32(energy)x15(sensor channel) 8s erg_load_lepi_nml
3dflux_FHEDU Unidirectional differential helium+ number flux /cm2 sec str keV (time)x32(energy)x8(sensor channel:0-7)x16(spin phase) 8s erg_load_lepi_nml
3dflux_FHEDU_sub Unidirectional differential helium+ number flux /cm2 sec str keV (time)x32(energy)x7(sensor channel:8-e)x16(spin phase) 8s erg_load_lepi_nml
3dflux_FHEEDU Unidirectional differential helium+ energy flux keV/cm2 sec str keV (time)x32(energy)x8(sensor channel:0-7)x16(spin phase) 8s erg_load_lepi_nml
3dflux_FHEEDU Unidirectional differential helium+ energy flux keV/cm2 sec str keV (time)x32(energy)x7(sensor channel:8-e)x16(spin phase) 8s erg_load_lepi_nml
3dflux_FHEDU_COUNT_RAW Raw helium+ count 1/sample (time)x32(energy)x8(sensor channel:0-7)x16(spin phase) 8s erg_load_lepi_nml
3dflux_FHEDU_COUNT_RAW_sub Raw helium+ count 1/sample (time)x32(energy)x7(sensor channel:8-e)x16(spin phase) 8s erg_load_lepi_nml
3dflux_FHEDU_Quality Quality flag for each energy bin and channel (time)x32(energy)x15(sensor channe) 8s erg_load_lepi_nml
3dflux_FODU Unidirectional differential oxygen+ number flux /cm2 sec str keV (time)x32(energy)x8(sensor channel:0-7)x16(spin phase) 8s erg_load_lepi_nml
3dflux_FODU_sub Unidirectional differential oxygen+ number flux /cm2 sec str keV (time)x32(energy)x7(sensor channel:8-e)x16(spin phase) 8s erg_load_lepi_nml
3dflux_FOEDU Unidirectional differential oxygen+ energy flux keV/cm2 sec str keV (time)x32(energy)x8(sensor channel:0-7)x16(spin phase) 8s erg_load_lepi_nml
3dflux_FOEDU Unidirectional differential oxygen+ energy flux keV/cm2 sec str keV (time)x32(energy)x8(sensor channel:8-e)x16(spin phase) 8s erg_load_lepi_nml
3dflux_FODU_COUNT_RAW Raw oxygen+ count 1/sample (time)x32(energy)x8(sensor channel:0-7)x16(spin phase) 8s erg_load_lepi_nml
3dflux_FODU_COUNT_RAW_sub Raw oxygen+ count 1/sample (time)x32(energy)x7(sensor channel:8-e)x16(spin phase) 8s erg_load_lepi_nml
3dflux_FODU_Quality Quality flag for each energy bin and channel (time)x32(energy)x15(sensor channel) 8s erg_load_lepi_nml
FIDU_Energy center energy of energy bin keV 1x32(energy step) (constant) erg_load_lepi_nml
FIDU_Channel The number of sensor channel 1x15(channel) (constant) erg_load_lepi_nml
FIDU_Angle_SGA Detector look-direction in SGA coordinates deg 2(elevation, azimuth)x15(sensor channel) (constant) erg_load_lepi_nml
  • The LEP-PI team recommends to use the data from ch0-ch7 (FPDU/FHEDU/FODU) for the primary analysis. If you use the data from ch8-che (FPDU/FHEDU/FODU_sub), please contact at erg_lepi_info at isee.nagoya-u.ac.jp.


Omni-directional flux data (data file name: erg_lepi_l2_omniflux_YYYYMMDD_vAA_BB.cdf)
Name Description Units Dimension Nominal Time Resolution Data Load Routine for SPEDAS
Epoch Time at the beginning of spin sector sec (time) 8s erg_load_lepi,datatype='omniflux'
FPDO Omni-directional differential proton number flux /cm2 sec str keV (time) x 32(energy) 8s erg_load_lepi,datatype='omniflux'
FHEDO Omni-directional differential helium+ number flux /cm2 sec str keV (time) x 32(energy) 8s erg_load_lepi,datatype='omniflux'
FODO Omni-directional differential oxygen+ number flux /cm2 sec str keV (time) x 32(energy) 8s erg_load_lepi,datatype='omniflux'
FIDU_Energy center energy of energy bin keV 1x32(energy step) (constant) erg_load_lepi_nml


Level-3 Data
Name Description Dimension Nominal Time Resolution Data Load Routine for SPEDAS

Data Inventory (Data Archive Status)

Data repository: http://ergsc.isee.nagoya-u.ac.jp/data/ergsc/satellite/erg/lepi/

Name Processed until Latest Calibration Version Remarks