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Radar Environment

Radar Environment

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The atmosphere, also called the troposphere, produces losses in radar signal propagation due to atmospheric attenuation, and to beam spreading. Atmospheric attenuation. This loss is caused by molecular absorption by oxygen and water vapor in the atmosphere. The loss increases gradually with frequency in the microwave-frequency region, and has resonant peaks at 22.3 GHz due to water vapor and at 60 GHz due to oxygen. The attenuation decreases with altitude, and usually can be neglected above 10 km. For surface radars, the attenuation decreases with increasing elevation angle, and can usually be neglected at elevation angles above 10 degrees.

Chapter Contents:

  • 4.1 Atmospheric Losses
  • 4.2 Rain Loss
  • 4.3 Atmospheric Refraction
  • 4.4 Terrain Masking and Multipath
  • 4.5 Radar Clutter
  • 4.6 Ionospheric Effects
  • 4.7 Electronic Countermeasures (ECM)

Inspec keywords: radar signal processing; troposphere; millimetre wave radar

Other keywords: troposphere; beam spreading; radar signal propagation; radar environment; molecular absorption; oxygen; water vapor; atmospheric attenuation; microwave-frequency region; surface radars

Subjects: Signal processing and detection; Radar equipment, systems and applications

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