<DOC>
<DOCNO>
531
</DOCNO>
<TITLE>
the flow about a moving body in the upper ionosphere .
</TITLE>
<AUTHOR>
bird,g.a.
</AUTHOR>
<BIBLIO>
j. ae. scs. 29, 1962.
</BIBLIO>
<TEXT>
  a particle approach is used to study the flow pattern around a
body moving in the upper layers of the ionosphere .  the effects
of distant encounters between charged particles (dynamic friction)
and of the earth's magnetic field are taken into account .
it is shown that, when the magnetic lines of force are parallel
to the direction of motion of the body, there may be a marked
concentration of charged particles in the vicinity of the body
and a considerable fraction of the reflected or deflected charged
particles may reimpinge on the body surface .  a numerical example
is given for the size and shape of the charged-particledensity
contours in the flow field surrounding a circular disc,
and these are compared with the corresponding neutral-particle
contours .
</TEXT>
</DOC>
