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Annales Geophysicae An interactive open-access journal of the European Geosciences Union
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Volume 26, issue 1
Ann. Geophys., 26, 59–75, 2008
https://doi.org/10.5194/angeo-26-59-2008
© Author(s) 2008. This work is distributed under
the Creative Commons Attribution 3.0 License.
Ann. Geophys., 26, 59–75, 2008
https://doi.org/10.5194/angeo-26-59-2008
© Author(s) 2008. This work is distributed under
the Creative Commons Attribution 3.0 License.

  04 Feb 2008

04 Feb 2008

Full profile incoherent scatter analysis at Jicamarca

D. L. Hysell1, F. S. Rodrigues1, J. L. Chau2, and J. D. Huba3 D. L. Hysell et al.
  • 1Earth and Atmospheric Science, Cornell University, Ithaca, NY, USA
  • 2Radio Observatorio de Jicamarca, Instituto Geof\'\i sico del Perú, Lima, Perú
  • 3Plasma Physics Division, Naval Research Laboratory, Washington, D.C., USA

Abstract. Incoherent scatter data from a hybrid long-pulse/double-pulse experiment at Jicamarca are analyzed using a full-profile analysis similar to the one implemented by Holt et al. (1992). In this case, plasma density, electron and ion temperatures, and light ion composition profiles in the topside are estimated simultaneously. Full-profile analysis is crucial at Jicamarca, since the long correlation time of the incoherent scatter signal at 50 MHz invalidates conventional gated analysis. Results for a 24 h interval in April of 2006 are presented, covering altitudes through 1600 km with 10 min time resolution, and compared with results from the NRL ionospheric model SAMI2. The analysis provides the first comprehensive assessment of ionospheric conditions over Jicamarca at sunrise as well as the first 24-h record of helium ion layers. Possible refinements to the experiment and the algorithm are discussed.

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