Atmospheric Effects on Ultra High Frequency Radio Propagation.

Abstract

The dependence of received power on range within and below atmospheric ducts was measured in conditions of elevated, nonhomogeneous, multilayered ducts. An aircraft with UHF transmitter covered the range 0 to 150 nm. from a shore based receiver. Range dependent maxima and minima in received power were detected at the surface in elevated duct conditions. The results were compared to predictions from ray, waveguide multi-mode, and single mode theories. Ray and single mode theories were inadequate to predict power patterns over the horizon. Multi-mode theory yielded qualitative agreement for conditions of deep, low elevated ducts. Agreement for higher, thinner, ducts was poor. Multilayered duct systems were observed and produced interference patterns without recognizable period with range. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1982
Accession Number
ADA119581

Entities

People

  • Joseph Clent Boudreaux Iii

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Agreements
  • Aircraft Equipment
  • Aircrafts
  • Altitude
  • Automatic Gain Control
  • Coaxial Cables
  • Data Analysis
  • Digital Data
  • Electromagnetic Wave Propagation
  • Measurement
  • Power Levels
  • Power Meters
  • Temperature Inversion
  • Transmitters
  • United States
  • United States Naval Academy
  • Waveguides

Readers

  • Mathematics or Statistics
  • Radar Systems Engineering.
  • Wave Propagation and Nonlinear Chaotic Dynamics.