Studies of polar mesosphere summer echoes by VHF radar and rocket probes

Details Studies of polar mesosphere summer echoes by VHF radar and rocket probes Studies of polar mesosphere summer echoes by VHF radar and rocket probes

Sep 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994adspr..14..139h&link_type=abstract

Advances in Space Research, Volume 14, Issue 9, p. 139-148.

Physics

21

Scientific paper

At radar frequencies in the range 50 MHz to 250 MHz, at times even to over 1 GHz, strong enhancements of scattering cross section occur between ≅ 80km and ≅ 95km altitude in summer at high latitudes. These echoes, termed `` Polar Mesosphere Summer Echoes'' (PMSE), have attracted considerable experimental effort. Observations of this phenomenon are reviewed in the context of atmospheric dynamics and of scattering processes. Recent rocket and radar measurements indicate that a partial reflection from a multitude of ion layers and constructive interference causes at least some of the PMSE. It is discussed which further observations are necessary and some possible practical consequences of PMSE are pointed out.

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