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Annales Geophysicae An interactive open-access journal of the European Geosciences Union
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Volume 24, issue 5
Ann. Geophys., 24, 1333-1342, 2006
https://doi.org/10.5194/angeo-24-1333-2006
© Author(s) 2006. This work is distributed under
the Creative Commons Attribution 3.0 License.

Special issue: The 11th International Symposium on Equatorial Aeronomy (ISEA-11),...

Ann. Geophys., 24, 1333-1342, 2006
https://doi.org/10.5194/angeo-24-1333-2006
© Author(s) 2006. This work is distributed under
the Creative Commons Attribution 3.0 License.

  03 Jul 2006

03 Jul 2006

F-region electron density and Te / Ti measurements using incoherent scatter power data collected at ALTAIR

M. Milla and E. Kudeki M. Milla and E. Kudeki
  • Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, Illinois, USA

Abstract. The ALTAIR UHF radar was used in an incoherent scatter experiment to observe the low-latitude ionosphere during the Equis 2 rocket campaign. The measurements provided the first high-resolution electron density maps of the low-latitude D- and E-region in the Pacific sector and also extended into the F-region and topside ionosphere. Although the sampling frequency was well below the Nyquist frequency of F-region returns, we were able to estimate Te / Ti ratio and infer unbiased electron density estimates using a regularized inversion technique described here. The technique exploits magnetic aspect angle dependence of ISR cross-section for Te>Ti.

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