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Annales Geophysicae An interactive open-access journal of the European Geosciences Union
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Volume 15, issue 7
Ann. Geophys., 15, 935–941, 1997
https://doi.org/10.1007/s00585-997-0935-z
© European Geosciences Union 1997
Ann. Geophys., 15, 935–941, 1997
https://doi.org/10.1007/s00585-997-0935-z
© European Geosciences Union 1997

  31 Jul 1997

31 Jul 1997

First HF radar measurements of summer mesopause echoes at SURA

A. N. Karashtin, Y. V. Shlyugaev, V. I. Abramov, I. F. Belov, I. V. Berezin, V. V. Bychkov, E. B. Eryshev, and G. P. Komrakov A. N. Karashtin et al.
  • Radiophysical Research Institute (NIRFI), 25 B. Pecherskaya, Nizhny Novgorod 603600, Russia, e-mail: tolk@nir®.sci-nnov.ru

Abstract. HF sounding of the mesosphere was first carried out at SURA in summer 1994 at frequencies in the range 8–9 MHz using one of the sub-arrays of the SURA heating facility. The observations had a range resolution of 3 km. Almost all measurements indicated the presence of strong radar returns from altitudes between 83 and 90 km with features very similar to VHF measurements of mesopause summer echoes at mid-latitudes and polar mesopause summer echoes. In contrast to VHF observations, HF mesopause echoes are almost always present.

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