ErgSat/PreOrb

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Files

  1. Short-term (20 days): the files will be updated twice a week
    filename:erg_orb_spre_l2_yyyymmdd_v01.cdf
    directory: https://ergsc.isee.nagoya-u.ac.jp/data/ergsc/satellite/erg/orb/spre/
  2. Mid-term (210 days): the files will be updated every three months
    filename:erg_orb_mpre_l2_yyyymmdd_v01.cdf
    directory: https://ergsc.isee.nagoya-u.ac.jp/data/ergsc/satellite/erg/orb/mpre/
  3. Long-term (2 years): the files will be updated every year
    filename:erg_orb_lpre_l2_yyyymmdd_v01.cdf
    directory: https://ergsc.isee.nagoya-u.ac.jp/data/ergsc/satellite/erg/orb/lpre/

Science Data Products

Level-2 Data
Name Description Dimension Nominal Time Resolution Data Load Routine for SPEDAS
erg_pos_gse Spacecraft positions in GSE coordinates  3 6s
erg_pos_gsm Spacecraft positions in GSM coordinates 3 6s
erg_pos_sm Spacecraft positions in SM coordinates 3 6s
erg_pos_rmlatml R, magnetic latitude, and magnetic local time of spacecraft positions (using IGRF model) 3 6s
erg_pos_eq Spacecraft positions mapped onto the magnetic equator (using IGRF model) 2 6s
erg_pos_iono_north Geographic latidue and longitude of spacecraft footprints at 100 km in the northern hemisphere (using IGRF model) 2 6s
erg_pos_iono_south Geographic latidue and longitude of spacecraft footprints at 100 km in the southern hemisphere (using IGRF model) 2 6s
erg_pos_blocal Model B vector in the GSM coordinate system at the spacecraft position 3 6s
erg_pos_blocal_mag Magnetic field strength at spacecraft positions, using IGRF model 1 6s
erg_pos_beq Magnetic field in the GSM coordinate system at spacecraft positions mapped onto the magnetic equator, using IGRF model 3 6s
erg_pos_beq_mag Magnetic field strength at spacecraft positions mapped onto the magnetic equator, using IGRF model 1 6s
erg_pos_Lm McIlwain L (Lm) parameter for pitch angles of 30˚, 60˚, and 90˚ 3 6s
erg_vel_gse Spacecraft velocity in GSE coordinates 3 6s
erg_vel_gsm Spacecraft velocity in GSM coordinates 3 6s
erg_vel_sm Spacecraft velocity in SM coordinates 3 6s
erg_man_prep_flag Flag for maneuver preparation (final orbit file) 1 6s
erg_man_on_flag Flag for maneuver on/off (final orbit file) 1 6s
erg_eclflag Flag for eclipse (final orbit file) 1 6s


File download with SPEDAS

- load procedure is stored in the latest bleeding edge [[1]]

timespan,'2018-02-12’,14
erg_init
erg_load_orb_predict,datatype=[‘spre’,’mpre’,’lpre’]
tplot,['erg_orb_spre_l2_pos_gse','erg_orb_mpre_l2_pos_gse','erg_orb_lpre_l2_pos_gse']
timespan,'2018-05-01’,31
erg_load_orb_predict,datatype=’mpre’
tplot,['erg_orb_mpre_l2_pos_gse']

How to look at the source file and the file generation date

timespan,'2018-05-01’,31
erg_load_orb_predict,datatype=’mpre’
get_data,'erg_orb_mpre_l2_pos_gse',data=data,dlim=dlim
print,dlim.cdf.gatt.source_file; (showing the source file name)
print,dlim.cdf.gatt.generation_date; (showing the generation data of CDF)