Sensing Systems Summary Quiz

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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?

256 Signup and view all the answers

Which system listed could potentially function as a geostationary system?

NOAA Signup and view all the answers

What is the primary purpose of remote sensing?

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

What is the role of the atmosphere in remote sensing?

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

What is the difference between passive and active remote sensing?

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

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

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

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

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

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

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

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

95 percent Signup and view all the answers

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

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

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

0.4 µm to 0.7 µm Signup and view all the answers

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

Infrared light Signup and view all the answers

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

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

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

0.7 µm to 1000 µm Signup and view all the answers

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

Its reaction control system fuel was depleted. Signup and view all the answers

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

Short wavelengths Signup and view all the answers

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

The abundance of particles or gases Signup and view all the answers

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

Rayleigh Scatter Signup and view all the answers

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

Blue wavelengths Signup and view all the answers

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

Radio telescope Signup and view all the answers

Why does the sky appear blue during daytime?

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

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

Rayleigh scattering Signup and view all the answers

Where does Mie scattering primarily occur?

In the lower atmosphere Signup and view all the answers

What makes clouds and fog appear white?

Nonselective scattering Signup and view all the answers

Which atmospheric constituents are major energy absorbers?

Carbon dioxide, Water vapor, and Ozone Signup and view all the answers

What type of scattering dominates when cloud conditions are overcast?

Mie scattering Signup and view all the answers

What factor(s) can affect water reflectance?

Turbidity, Vegetation, pH, Salt Concentration Signup and view all the answers

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

Specular Reflection Signup and view all the answers

What determines the type of reflection a surface will exhibit?

Surface roughness compared to the wavelength of the incoming radiation Signup and view all the answers

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

Image, Imagery Signup and view all the answers

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

Active Remote Sensing Signup and view all the answers

What is the range of wavelengths typically recorded on photographs?

$0.3$ μm to $0.7$ μm Signup and view all the answers