Ulysse Io Torus data at AMDA

• Ulysse Io Torus data are taken from LESIA.
• The electron density measurements Ne are given in cm-3 and the given acquisition time for each value is dependant on three different measurement methods (flagged by 0,1 or 2). Ne_min and Ne_max stands for errors bars on the density measurements (which are also strongly depending on the measurements methods)
  • The method #0 corresponds to densities deduced from the upper hybrid frequency peak detection, in the HF band of the URAP/RAR receiver (firstly published in Hoang et al., Planet. Space Sci.,Vol. 41, No. 11/12, pp. 1011-1020, 1993, and references therein). The given acquisition time is the elapsed time (UT) of the sweeping receiver at the f_uh peak acquisition.
  • The method #1 corresponds to density obtained by the minimum chi-square fitting of theoritical dispersion curves of Bernstein modes to the experimental dispersion curves derived from the URAP/RAR spectra, Ne and Te being the two free fitted parameters (Moncuquet et al., J. Geophys. Res., 100, 21697-21708 , 1995 and references therein); The given acquisition time for each density measurement is the elapsed time (UT) at mid-time of the whole spectrum acquisition (the acquisition duration of a whole spectrum is 128s). In this case, the determination of Ne and Te are synchronized , but they are not independently determined.
  • The method #2 corresponds to density obtained from detection of Bernstein "fQ" frequencies (Moncuquet et al.,J. Geophys. Res., 102, 2373-2379, 1997 and references therein). The given acquisition time is the elapsed time (UT) of the sweeping receiver at the lowest fQ acquisition.
• The electron core temperature measurements Te are given in K and are obtained by the minimum chi-square fitting of theoritical dispersion curves of Bernstein modes to the experimental dispersion curves derived from the URAP/RAR spectra,(Moncuquet et al., J. Geophys. Res., 100, 21697-21708 , 1995 and references therein). There is two cases for the fitting:
  • from 15:02:30 UT to 17:06:59 UT, Ne is known independently and Te is the only free fitted parameter ;
  • from 17:09:06 UT to 17:50:37 UT, Ne and Te are the both free fitted parameters.
  The given acquisition time is the elapsed time (UT) of the sweeping receiver at mid-time of the whole spectrum acquisition (the acquisition duration of a whole spectrum is 128s). Te_min and Te_max stands for errors bars on the temperature measurements Te.
• The B magnitude measurements are given in nanoTesla and are obtained by the detection of power spectrum relative minima at the harmonics of the gyrofrequency (firstly published in Meyer et al., J. Geophys. Res., 98, 21163-21176,1993 and references therein) . The given acquisition time is the elapsed time (UT) of the sweeping receiver at the highest harmonic acquisition.