Introduction to Electromagnetic and Electro-Optic Propagation

Introduction to Electromagnetic and Electro-Optic Propagation

Describe the electromagnetic spectrum.
Identify the visible, infrared (near, middle, far), and radio wave portions

Describe the following effects on atmospheric propagation of EM and EO radiation:
Refraction Scattering Absorption

With respect to refraction of radar waves:

  • Define refractivity
  • Describe how N-units and M-units of refractivity are derived
  • Describe how weather features affect refractivity and result in anomalous propagation, including trapping and ducting.
  • Define super-, sub-, normal or trapping refractivity.
  • Describe how refractivity results in normal or anomalous propagation.
  • Given a vertical profile of refractivity, identify regions of super, sub, normal or trapping propagation.

With respect to propagation of visible light and infrared radiation:

  • Describe the basic physics of infrared and visible radiation
  • Define the properties of a “black body”
  • Describe Planck's law and its derivatives: Stephan-Boltzmann’s Law and Wien’s Displacement Law.
  • Describe Lambert’s Cosine Law and Kirchoff’s Law and their implications for infrared radiation.
  • Given the environment (aerosol and weather), describe the effects on EO propagation.
  • Describe the types and causes of scattering and their effect of EO propagation
  • Describe the factors that affect atmospheric absorption of EO radiation
  • Describe the different types of contrast (inherent, apparent, threshold)
  • Describe Beer’s Law