Behavior of Metal Objects in
These articles address the remote
sensing of metallic space objects at radar, infra-red, and visible
This article (text, figures)
summarizes the geometric optics limit of the interaction
of electromagnetic waves with metals. The components of the description
are a complex index of refraction that depends on frequency and
conductivity, and the Fresnel equations describing the reflection and
transmission of a monochromatic wave incident on a planar surface. From
this follows a characterization of the heating and emissivity of metals
at frequencies below the visible. I address the specific case of the
heating and equilibrium of a metal surface exposed to earth and sun
radiation fields. A follow-on calculation provides the perpendicular and parallel components of the emissivity of a metal.
This article addresses in more detail the
thermal, emissive, and
reflective behavior of spheres in earth and sun radiation fields.
different emissivity models are considered. Specular and diffuse
reflection are considered, as are point and extended sources.
This article develops a description of radar cross
section in the physical optics limit. Analytical expressions are
developed for the
radar cross section of various simple shapes.
This article describes the electrical properties
of the fair weather atmosphere and considers the possibility of
electrical discharge on moving objects. It is a fun introduction to
the global electric field in which the surface of the earth and the
ionosphere form the two plates of a global capacitor.