Articles | Volume 26, issue 12
Ann. Geophys., 26, 3999–4012, 2008

Special issue: 13th International EISCAT Workshop

Ann. Geophys., 26, 3999–4012, 2008

  08 Dec 2008

08 Dec 2008

First estimates of volume distribution of HF-pump enhanced emissions at 6300 and 5577 Å: a comparison between observations and theory

B. Gustavsson1, M. Kosch2, A. Wong3, T. Pedersen4, C. Heinselman5, C. Mutiso6, B. Bristow7, J. Hughes6, and W. Wang3 B. Gustavsson et al.
  • 1Dept. of Physics and Technology, University of Tromsø, Tromsø, Norway
  • 2Department of Communication Systems, Lancaster University, Lancaster, UK
  • 3HIPAS Observatory, Two Rivers AK, USA
  • 5Space Vehicles Directorate, Air Force Research Laboratory, Hanscom AFB, MA, USA
  • 4SRI International, Menlo Park, CA, USA
  • 6Physical Science Dept, Embry-Riddle Aeronautical Univ., FL, USA
  • 7Geophysical Institute, University of Alaska, Fairbanks, AK, USA

Abstract. We present bi-static observations of radio-wave induced optical emissions at 6300 and 5577 Å from a night-time radio-induced optical emission ionospheric pumping experiment at the HIPAS (Fairbanks) facility in Alaska. The optical observations were made at HIPAS and from HAARP located 285 km south-east. From these observations the altitude distribution of the emissions is estimated with tomography-like methods. These estimates are compared with theoretical models. Other diagnostics used to support the theoretical calculations include the new Poker Flat AMISR UHF radar near HIPAS. We find that the altitude distribution of the emissions agree with electron transport modeling with a source of accelerated electrons located 20 km below the upper-hybrid altitude.