DAASM Project-High Latitude Aircraft HF Propagation Experiment

Abstract

The purpose of the DAASM project is to investigate the effects and limitations caused by the auroral and polar ionosphere on over-the-horizon HF propagation using a backscatter sounding system. The technique measures and records the complex amplitude of incoming, forward or backscatter signals, including noise, at each of the 12 elements of a broadside antenna array. The data is subsequently processed using sophisticated software on a CDC-6600 computer at AFCRL. This process, using Fourier analysis techniques, provides output in the form of Doppler frequency vs arrival-angle maps as well as coherence maps.

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Document Details

Document Type
Technical Report
Publication Date
May 19, 1975
Accession Number
ADA015764

Entities

People

  • Gary S. Sales
  • John I. Videberg
  • Rajan Varad

Organizations

  • Air Force Cambridge Research Laboratories

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Aircrafts
  • Angle Of Arrival
  • Antenna Arrays
  • Antenna Configurations
  • Computers
  • Data Processing
  • Frequency
  • Grids
  • High Latitudes
  • Instrumentation
  • Ionograms
  • Ionosphere
  • Latitude
  • Over The Horizon Radar
  • Power Spectra
  • Radar
  • Radio Frequency

Fields of Study

  • Physics

Readers

  • Phased Array Antenna Design.
  • Space/Atmospheric Physics.