Sensing Systems Summary Quiz
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Questions and Answers

Which system in the table has the highest radiometric resolution?

  • Hyperion (correct)
  • NOAA
  • Landsat 8
  • ENVS

    • Which system among the listed ones is capable of producing thermal images?

  • Hyperion
  • NOAA (correct)
  • ENVS
  • Landsat 8

    • How many digital numbers can be generated by the NOAA system?

  • 512 (correct)
  • 256
  • 255
  • 511

    • What is the maximum digital number that can be generated by the ENVS system?

    <p>256</p> Signup and view all the answers

    Which system listed could potentially function as a geostationary system?

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

    What is the primary purpose of remote sensing?

    <p>To acquire information about the Earth's surface without being in direct contact with it</p> Signup and view all the answers

    What is the role of the atmosphere in remote sensing?

    <p>The atmosphere absorbs and scatters the electromagnetic radiation from the Earth's surface</p> Signup and view all the answers

    What is the difference between passive and active remote sensing?

    <p>Passive sensing relies on external sources of electromagnetic radiation, while active sensing uses its own source</p> Signup and view all the answers

    What is the purpose of the electromagnetic spectrum in remote sensing?

    <p>The electromagnetic spectrum is used to study the Earth, solar system, and universe</p> Signup and view all the answers

    What is the role of the human eye in remote sensing?

    <p>The human eye can only detect a small portion of the electromagnetic spectrum used in remote sensing</p> Signup and view all the answers

    What is the purpose of data processing and analysis in remote sensing?

    <p>Data processing and analysis is used to interpret and apply the information collected by remote sensing</p> Signup and view all the answers

    What percentage of UV-B rays are absorbed by the Earth's ozone layer?

    <p>95 percent</p> Signup and view all the answers

    Which of the following best describes the relationship between electromagnetic radiation and visible light?

    <p>Visible light is a small portion of the electromagnetic spectrum that we can perceive.</p> Signup and view all the answers

    What is the range of wavelengths that make up the visible light spectrum?

    <p>0.4 µm to 0.7 µm</p> Signup and view all the answers

    What type of light does a remote control use to change channels on a TV?

    <p>Infrared light</p> Signup and view all the answers

    Which of the following best describes the thermal IR region of the electromagnetic spectrum?

    <p>The thermal IR region is the radiation emitted from the Earth's surface as heat.</p> Signup and view all the answers

    What is the wavelength range of the infrared (IR) region of the electromagnetic spectrum?

    <p>0.7 µm to 1000 µm</p> Signup and view all the answers

    What happened to the telescope after nine and a half years of operation?

    <p>Its reaction control system fuel was depleted.</p> Signup and view all the answers

    Which type of radiation does Earth's atmosphere block, including Gamma Ray, X-Ray, and 95% of UV?

    <p>Short wavelengths</p> Signup and view all the answers

    What determines how much scattering takes place in Earth's atmosphere?

    <p>The abundance of particles or gases</p> Signup and view all the answers

    What is the term for scattering that occurs when particles are much smaller than the wavelength of light?

    <p>Rayleigh Scatter</p> Signup and view all the answers

    Which type of energy does Rayleigh scattering cause to be scattered much more than longer wavelengths?

    <p><strong>Blue</strong> wavelengths</p> Signup and view all the answers

    What did China build in its search for aliens that is comparable in size to 30 soccer fields?

    <p><strong>Radio telescope</strong></p> Signup and view all the answers

    Why does the sky appear blue during daytime?

    <p>Due to Rayleigh scattering caused by smaller particles in the upper atmosphere</p> Signup and view all the answers

    What causes the sky to appear red or orange during sunrise or sunset?

    <p>Rayleigh scattering</p> Signup and view all the answers

    Where does Mie scattering primarily occur?

    <p>In the lower atmosphere</p> Signup and view all the answers

    What makes clouds and fog appear white?

    <p>Nonselective scattering</p> Signup and view all the answers

    Which atmospheric constituents are major energy absorbers?

    <p>Carbon dioxide, Water vapor, and Ozone</p> Signup and view all the answers

    What type of scattering dominates when cloud conditions are overcast?

    <p>Mie scattering</p> Signup and view all the answers

    What factor(s) can affect water reflectance?

    <p>Turbidity, Vegetation, pH, Salt Concentration</p> Signup and view all the answers

    Which type of reflection occurs when the surface is smooth and directs energy away in a single direction?

    <p>Specular Reflection</p> Signup and view all the answers

    What determines the type of reflection a surface will exhibit?

    <p>Surface roughness compared to the wavelength of the incoming radiation</p> Signup and view all the answers

    What term refers to any pictorial representation detected by remote sensing devices?

    <p>Image, Imagery</p> Signup and view all the answers

    Which type of remote sensing system provides its own energy source for illumination?

    <p>Active Remote Sensing</p> Signup and view all the answers

    What is the range of wavelengths typically recorded on photographs?

    <p>$0.3$ μm to $0.7$ μm</p> Signup and view all the answers

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