Naturally enhanced ion-acoustic lines at high altitudes (2008)
Ogawa, Y., Buchert, S. C., Fujii, R., Nozawa, S., Forme, F.
Naturally enhanced ion-acoustic lines (NEIALs) between 1200 and 1900 km altitude are investigated. The NEIALs were found in the background gates of data from the European Incoherent Scatter (EISCAT)...
Naturally enhanced ion-acoustic lines at high altitudes (2008)
Ogawa, Y., Buchert, S. C., Fujii, R., Nozawa, S., Forme, F.
Naturally enhanced ion-acoustic lines (NEIALs) between 1200 and 1900 km altitude are investigated. The NEIALs were found in the background gates of data from the European Incoherent Scatter (EISCAT)...
Sundkvist, D., Vaivads, A., André, M., Hobara, Y., Joko, S., ...
We present a detailed study of waves with frequencies near the proton gyrofrequency in the high-altitude cusp for northward IMF as observed by the Cluster spacecraft. Waves in this regime can be...
Simultaneous high- and low-latitude reconnection: ESR and DMSP observations (2008)
Pitout, F., Newell, P. T., Buchert, S. C.
We present EISCAT Svalbard Radar and DMSP observations of a double cusp during an interval of predominantly northward IMF on 26 November 2000. In the cusp region, the ESR dish, pointing northward,...
Frequency dependent power fluctuations: a feature of the ESR system or physical? (2008)
Ogawa, Y., Forme, F., Buchert, S. C.
The k-dependence of the received power in high signal-to-noise ratio (SNR) conditions, occurring for naturally enhanced ion-acoustic lines (NEIALs) and for real satellites, is investigated by using...
Effects of a kappa distribution function of electrons on incoherent scatter spectra (2008)
Saito, S., Forme, F. R. E., Buchert, S. C., Nozawa, S., Fujii, R.
In usual incoherent scatter data analysis, the plasma distribution function is assumed to be Maxwellian. In space plasmas, however, distribution functions with a high energy tail which can be well...
Effects of atmospheric oscillations on the field-aligned ion motions in the polar F-region (2008)
Oyama, S., Nozawa, S., Buchert, S. C., Ishii, M., Watari, S., Sagawa, E., ...
The field-aligned neutral oscillations in the F-region (altitudes between 165 and 275 km) were compared using data obtained simultaneously with two independent instruments: the European Incoherent...
Sundkvist, D., Vaivads, A., André, M., Hobara, Y., Joko, S., ...
We present a detailed study of waves with frequencies near the proton gyrofrequency in the high-altitude cusp for northward IMF as observed by the Cluster spacecraft. Waves in this regime can be...
Simultaneous high- and low-latitude reconnection: ESR and DMSP observations (2008)
Pitout, F., Newell, P. T., Buchert, S. C.
We present EISCAT Svalbard Radar and DMSP observations of a double cusp during an interval of predominantly northward IMF on 26 November 2000. In the cusp region, the ESR dish, pointing northward,...
Frequency dependent power fluctuations: a feature of the ESR system or physical? (2008)
Ogawa, Y., Forme, F., Buchert, S. C.
The k-dependence of the received power in high signal-to-noise ratio (SNR) conditions, occurring for naturally enhanced ion-acoustic lines (NEIALs) and for real satellites, is investigated by using...
Effects of a kappa distribution function of electrons on incoherent scatter spectra (2008)
Saito, S., Forme, F. R. E., Buchert, S. C., Nozawa, S., Fujii, R.
In usual incoherent scatter data analysis, the plasma distribution function is assumed to be Maxwellian. In space plasmas, however, distribution functions with a high energy tail which can be well...
Effects of atmospheric oscillations on the field-aligned ion motions in the polar F-region (2008)
Oyama, S., Nozawa, S., Buchert, S. C., Ishii, M., Watari, S., Sagawa, E., ...
The field-aligned neutral oscillations in the F-region (altitudes between 165 and 275 km) were compared using data obtained simultaneously with two independent instruments: the European Incoherent...
Observations of diverging field-aligned ion flow with the ESR (2008)
Buchert, S. C., Ogawa, Y., Fujii, R., Van Eyken, A. P.
We report on observations of a diverging ion flow along the geomagnetic field that is often seen at the EISCAT Svalbard radar. The flow is upward above the peak of the electron density in the...
Sugino, M., Fujii, R., Nozawa, S., Nagatsuma, T., Buchert, S. C., Gjerloev, J. W., ...
Attempting to derive the field-aligned current (FAC) density using the EISCAT radar and to understand the role of the ionosphere on closing FACs, we conducted special radar experiments with the...
Observation of isotropic electron temperature in the turbulent E region (2008)
Saito, S., Buchert, S. C., Nozawa, S., Fujii, R.
Using EISCAT radar data, we find that electrons are strongly heated in the magnetic field-line direction during high electric field events. The remote site data show that the electron temperature...
Ion upflow and downflow at the topside ionosphere observed by the EISCAT VHF radar (2008)
Endo, M., Fujii, R., Ogawa, Y., Buchert, S. C., Nozawa, S., Watanabe, S., ...
We have determined the MLT distribution and KP dependence of the ion upflow and downflow of the thermal bulk oxygen ion population based on a data analysis using the EISCAT VHF radar CP-7 data...
Ionospheric conductance distribution and MHD wave structure: observation and model (2008)
Budnik, F., Stellmacher, M., Buchert, S. C.
The ionosphere influences magnetohydrodynamic waves in the magnetosphere by damping because of Joule heating and by varying the wave structure itself. There are different eigenvalues and...
Observations of diverging field-aligned ion flow with the ESR (2008)
Buchert, S. C., Ogawa, Y., Fujii, R., Van Eyken, A. P.
We report on observations of a diverging ion flow along the geomagnetic field that is often seen at the EISCAT Svalbard radar. The flow is upward above the peak of the electron density in the...
Sugino, M., Fujii, R., Nozawa, S., Nagatsuma, T., Buchert, S. C., Gjerloev, J. W., ...
Attempting to derive the field-aligned current (FAC) density using the EISCAT radar and to understand the role of the ionosphere on closing FACs, we conducted special radar experiments with the...
Observation of isotropic electron temperature in the turbulent E region (2008)
Saito, S., Buchert, S. C., Nozawa, S., Fujii, R.
Using EISCAT radar data, we find that electrons are strongly heated in the magnetic field-line direction during high electric field events. The remote site data show that the electron temperature...
Ion upflow and downflow at the topside ionosphere observed by the EISCAT VHF radar (2008)
Endo, M., Fujii, R., Ogawa, Y., Buchert, S. C., Nozawa, S., Watanabe, S., ...
We have determined the MLT distribution and KP dependence of the ion upflow and downflow of the thermal bulk oxygen ion population based on a data analysis using the EISCAT VHF radar CP-7 data...
Ionospheric conductance distribution and MHD wave structure: observation and model (2008)
Budnik, F., Stellmacher, M., Buchert, S. C.
The ionosphere influences magnetohydrodynamic waves in the magnetosphere by damping because of Joule heating and by varying the wave structure itself. There are different eigenvalues and...
Thin electron-scale layers at the magnetopause (2004)
André, M., Vaivads, A., Buchert, S.C., Fazakerley, A.N., Lahiff, A.
We use data from the four Cluster satellites to examine the microphysics of a thin electron-scale layer discovered on the magnetospheric side of the magnetopause. Here the ion and electron motions...