Welcome to CORALL home page.
Yu.I.Yermolaev, A.O.Fedorov, O.L.Vaisberg, V.M.Balebanov, Yu.A.Obod
Space Research Institute, Russian Academy of Sciences, Russia
R.Jimenez, J.Fleites, L.Llera
Intercosmos, Republic Cuba
A.N.Omelchenko
Institute of Applied Geophysics, Russian Hydrometeorological Service, Russia
Hemispherical electrostatic ion energy spectrometer CORALL has fan-shaped field-of-view of 10 x 150 degrees. Satellite rotation with period about 2 min enables one to perform quasi-3D measurements of Energy/Charge ion distribution function in the range from 30 to 24200 eV/q with good energy resolution. The accumulation time on 1 energy step is 1/1024-th of the satellite rotation period, i.e. about 100 msec, and the scan period of 1 energy spectrum (32 steps) is equal to about 4 min. The main technical features of instrument are presented in Table.
Since August 14, 1995 the instrument is working. However, there were any problems with system BNS which provides pulse of satellite rotation (The CORALL uses this pulse for performance of measurements in inercia coordinate system). Since August 31, 1995 the complex BNS + CORALL is operating properly.
The following picture shows measurements of ion energy spectra with 3 polar channels of instrument during magnetopause crossing on 19:52 UT October 18.
Click picture to get big one.
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