DOI: 10.5281/zenodo.14928573
title: Alternate Precipitation of Auroral Electrons and Ions by Bipolar Field-Aligned Electric Fields: Characteristic Events of Low-Altitude Reimei Observations

description: 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 fileIDL> 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,epochprintf,11,format='(i4)',yy_obsprintf,11,format='(i2)',mo_obsprintf,11,format='(i2)',dd_obsprintf,11,format='(i2)',hhhprintf,11,format='(i2)',mmmprintf,11,format='(i2)',sssprintf,11,format='(i3)',msecprintf,11,format='(Z8)',tiprintf,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)',imodeprintf,11,format='(f7.2)',expos(n)printf,11,format='(f7.2)',timresprintf,11,format='(i3)',qualityprintf,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.