This contains the original data used by the paper 'Ion Inverted-V Precipitation Adjoining Auroral Arc: Low-Altitude Observations with High Time/Space Resolution by the Reimei Microsatellite', 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 2025-01-11, 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 2025-01-11, 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.