<LI><A NAME="tex2html1" HREF="node2.html#57">Variations in the density and temperature of Earth's neutral 
atmosphere with altitude [Abell, 1982]. </A>
<LI><A NAME="tex2html2" HREF="node2.html#64">Regions of the atmosphere and associated variations in temperature [Fix, 1995]. </A>
<LI><A NAME="tex2html3" HREF="node2.html#92">Neutral atmospheric densities for various molecular and atomic species [Cravens, 1997]. </A>
<LI><A NAME="tex2html4" HREF="node2.html#96">International quiet solar year daytime ionospheric and atmospheric composition based on 
mass spectrometer measurements [Johnson, 1969; Luhmann, 1995]. </A>
<LI><A NAME="tex2html5" HREF="node4.html#138">Geometry of the ray path, showing the zenith angle  <IMG WIDTH=8 HEIGHT=14 ALIGN=MIDDLE ALT="tex2html_wrap_inline538" SRC="img1.gif"  >  and the height <I>z</I> (or <I>h</I>) 
[Luhmann, 1995]. </A>
<LI><A NAME="tex2html6" HREF="node9.html#341">Typical plasma density profile of Earth's ionosphere, showing the D, E, and F layers,  
as functions of altitude [Brand, 1998]. </A>
<LI><A NAME="tex2html7" HREF="node9.html#345">Typical ionospheric density profiles for the day and night [Cravens, 1997].</A>
<LI><A NAME="tex2html8" HREF="node10.html#359">Power spectrum of 4 GHz ionospheric scintillations for an event measured in Hong 
Kong in 1973 [Lanzerotti, 1979] . </A>
