RADARSAT Image Interpretation Challenges
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Questions and Answers

What is the primary cause of fading in a coherent imaging system?

  • Variation in the phase delay caused by multiple targets in a resolution cell with range variations differing by less than a wavelength (correct)
  • Changes in the polarization of the radar waves
  • Differences in the amplitude of the received signal
  • Variations in the frequency of the electromagnetic radiation

    • What is the characteristic appearance of speckle in radar images?

  • A grainy, 'salt and pepper' texture (correct)
  • A streaked, linear pattern
  • A smooth, uniform texture
  • A mottled, patchy appearance

    • What is the result of constructive interference in a coherent imaging system?

  • A complete loss of signal
  • Bright speckles in the image (correct)
  • Dark speckles in the image
  • No visible effect in the image

    • What is the term for the fixed relationship between waves in a beam of electromagnetic radiation?

    <p>Coherence</p> Signup and view all the answers

    What is the primary source of image artifacts in radar imagery?

    <p>Speckle and fading</p> Signup and view all the answers

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