Journal cover Journal topic
Annales Geophysicae An interactive open-access journal of the European Geosciences Union
Journal topic

Journal metrics

Journal metrics

  • IF value: 1.621 IF 1.621
  • IF 5-year value: 1.614 IF 5-year
    1.614
  • CiteScore value: 1.61 CiteScore
    1.61
  • SNIP value: 0.900 SNIP 0.900
  • SJR value: 0.910 SJR 0.910
  • IPP value: 1.58 IPP 1.58
  • h5-index value: 24 h5-index 24
  • Scimago H <br class='hide-on-tablet hide-on-mobile'>index value: 80 Scimago H
    index 80
Volume 26, issue 7
Ann. Geophys., 26, 1837-1850, 2008
https://doi.org/10.5194/angeo-26-1837-2008
© Author(s) 2008. This work is distributed under
the Creative Commons Attribution 3.0 License.
Ann. Geophys., 26, 1837-1850, 2008
https://doi.org/10.5194/angeo-26-1837-2008
© Author(s) 2008. This work is distributed under
the Creative Commons Attribution 3.0 License.

  03 Jul 2008

03 Jul 2008

Imaging radar observations of Farley Buneman waves during the JOULE II experiment

D. L. Hysell1, G. Michhue1, M. F. Larsen2, R. Pfaff3, M. Nicolls4, C. Heinselman4, and H. Bahcivan4 D. L. Hysell et al.
  • 1Earth and Atmospheric Sciences, Cornell University, Ithaca, NY, USA
  • 2Department of Physics, Clemson University, Clemson, SC, USA
  • 3NASA Goddard Space Flight Center, Greenbelt, MD, USA
  • 4SRI International, Menlo Park, CA, USA

Abstract. Vector electric fields and associated E×B drifts measured by a sounding rocket in the auroral zone during the NASA JOULE II experiment in January 2007, are compared with coherent scatter spectra measured by a 30 MHz radar imager in a common volume. Radar imaging permits precise collocation of the spectra with the background electric field. The Doppler shifts and spectral widths appear to be governed by the cosine and sine of the convection flow angle, respectively, and also proportional to the presumptive ion acoustic speed. The neutral wind also contributes to the Doppler shifts. These findings are consistent with those from the JOULE I experiment and also with recent numerical simulations of Farley Buneman waves and instabilities carried out by Oppenheim et al. (2008). Simple linear analysis of the waves offers some insights into the spectral moments. A formula relating the spectral width to the flow angle, ion acoustic speed, and other ionospheric parameters is derived.

Publications Copernicus
Download
Citation
Share