Alternate Precipitation of Auroral Electrons and Ions by Bipolar Field-Aligned Electric Fields: Characteristic Events of Low-Altitude Reimei Observations

This contains the original data used by the paper 'Alternate Precipitation of Auroral Electrons and Ions by Bipolar Field-Aligned Electric Fields: Characteristic Events of Low-Altitude Reimei Observations', which will appear in Geophysical Reseach Letters. The data were obtained by the Reimei satellite.

=====================================================================
EISA: electrostatic analyzer
[RE_ESA_*.sav (electrons), RE_ISA_*.sav (ions)]
=====================================================================

The file is in the IDL (Interactive Data Language) SAV format.
IDL> restore,'RE_ESA_******.L2.sav'   -- read sav file
IDL> help,eisa,/str
    VERSION      LONG     70317        -- version (not meaningful)
    SENSOR       INT      1            -- 1: ESA, -1: ISA
    KSTEP        DOUBLE   Array[29]    -- energy step [eV]
    JS           DOUBLE   Array[12794] -- second from 2000/1/1 00:00:00UT
              -- You can convert JS to year, month, day, and second of the day by the procedure JS2YMD in the JHU/APL/S1R library.
    FLUX         FLOAT    Array[12794,22,29]
                              -- energy flux (time, pitch angle, energy)
                              -- [eV/cm2 s str eV]
    PA           FLOAT    Array[12794,22] -- pitch angle [deg]
    GAS_ERR      LONG     Array[12794]
                              -- 0: ok,
                              -- nonzero: magnetic field data unavailable
                              --   (calculation of pitch angle is unsuccessful)
    KSTEPH       DOUBLE   Array[29]
                              -- higher energy boundary of energy bin in eV
    KSTEPL       DOUBLE   Array[29]
                              -- lower energy boundary of energy bin in eV

As of 2025-02-16, the same data files are also available at https://reimei.isee.nagoya-u.ac.jp/sav/

=====================================================================
MAC: auroral camera
[RE_MAC*]
=====================================================================

printf,11,epoch
printf,11,format='(i4)',yy_obs
printf,11,format='(i2)',mo_obs
printf,11,format='(i2)',dd_obs
printf,11,format='(i2)',hhh
printf,11,format='(i2)',mmm
printf,11,format='(i2)',sss
printf,11,format='(i3)',msec
printf,11,format='(Z8)',ti
printf,11,format='(f7.2)',mac_t(n)
printf,11,format='(f7.2)',mac_1t(n)
printf,11,format='(f7.2)',mac_f1t(n)
printf,11,format='(i1)',imode
printf,11,format='(f7.2)',expos(n)
printf,11,format='(f7.2)',timres
printf,11,format='(i3)',quality
printf,11,glat(*,*,n,ch)
printf,11,glon(*,*,n,ch)
printf,11,format='(f10.4)',footlatn(n)
printf,11,format='(f10.4)',footlonn(n)
printf,11,format='(f10.4)',footaltn(n)
printf,11,format='(2i4)',footpixx1n(n),footpixy1n(n)
printf,11,format='(3f12.8)',footdirxn(n),footdiryn(n),footdirzn(n)
printf,11,image1(*,*)

where 
epoch, yy_obs, mo_obs, dd_obs, hhh, mmm, sss, msec, ti represents the time of image data.

mac_t, mac_1t, mac_f1t are temperatures of imager elecgronics, CCD, and filter, respectively; 

imode is an observation mode;

timres is a time interval of successive images; 

quality is a data quality;

glat and glon are geographic latitudes and longitudes for each pixel of image;

footlatn, footlonn, footaltn are geographic latitude, longitude and altitude at footprint; 

footpixx1n and footpixy1n are (x,y) pixel numbers in image correspond to the footprints;

footdirxy, footdiryn, foordirzn are the vector of foorprint direction in J2000 coordinate system; 

image1(*,*) is an image data (usually 64x64 2-D array).

As of 2025-02-26, the same data files are also available at https://www.darts.isas.jaxa.jp/stp/data/index/Level-2/

=====================================================================
GAS: magentometer
[GAS_*]
=====================================================================

One line consists of 8 colums.
hh:mm:ss.sss dBn dBe dBd sigma(dBn) sigma(dBe) sigma(dBd) flag(1:MAC-on), where dBn, dBe, dBd are northward, eastward and downward, respectively.