Radar Imagery in Remote Sensing
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Questions and Answers

What is the main advantage of radar imagery over optical systems?

  • Radar imagery can capture images at a faster rate than optical systems
  • Radar imagery provides higher resolution images than optical systems
  • Radar imagery is less affected by atmospheric interference
  • Radar imagery does not require sunlight to produce an image (correct)

    • Which statement accurately describes the capabilities of Primary Surveillance Radar (PSR)?

  • It can locate the position of any aircraft within its coverage range (correct)
  • It is more effective in tracking moving targets than other radar systems
  • It has a coverage range of 220 Nautical Miles (NM)
  • It provides precise information about the size and location of the target

    • What is the primary benefit of radar's specific wavelength?

  • It allows penetration of cloud cover without affecting imagery (correct)
  • It enables real-time tracking of moving objects
  • It reduces the impact of electromagnetic interference on the radar system
  • It provides higher resolution images in comparison to other wavelengths

    • What is the primary function of RADAR systems?

    <p>To detect and locate target objects using electromagnetic radio waves</p> Signup and view all the answers

    What is the main function of Primary Surveillance Radar (PSR)?

    <p>Primary Surveillance Radar (PSR) is used for locating the position of aircraft within its coverage range.</p> Signup and view all the answers

    What is the primary advantage of radar as an active remote sensing system?

    <p>Radar provides its own source of energy to produce an image, so it does not require sunlight and can acquire data by day or night.</p> Signup and view all the answers

    What led to the development of imaging radar systems in the 1950s?

    <p>The need for a remote sensing system that does not rely on sunlight</p> Signup and view all the answers

    What is the specific benefit of radar's wavelength in terms of imagery acquisition?

    <p>Radar's specific wavelength allows it to penetrate cloud cover without affecting the imagery.</p> Signup and view all the answers

    When were imaging radar systems developed and by whom?

    <p>Imaging radar systems were developed in the 1950s mainly by the armed forces.</p> Signup and view all the answers

    What is the basic principle behind RADAR systems for detecting and locating target objects?

    <p>RADAR systems use electromagnetic radio waves to determine the angle, range, or velocity of objects that can reflect a signal back.</p> Signup and view all the answers

    What is the primary benefit of radar as an active remote sensing system?

    <p>Radar provides its own source of energy to produce an image.</p> Signup and view all the answers

    What is the specific benefit of radar's wavelength in terms of imagery acquisition?

    <p>Radar's specific wavelength allows it to penetrate cloud cover without any effect on the imagery.</p> Signup and view all the answers

    What is the main function of Primary Surveillance Radar (PSR)?

    <p>Primary Surveillance Radar (PSR) is used to locate the position of aircraft within its coverage range.</p> Signup and view all the answers

    What are the basic types of radar systems?

    <p>The basic types of radar systems are Primary RADAR and Secondary RADAR.</p> Signup and view all the answers

    When were imaging radar systems developed and by whom?

    <p>Imaging radar systems were developed in the 1950s mainly by the armed forces.</p> Signup and view all the answers

    Study Notes

    Radar Imagery vs. Optical Systems

    • Radar imagery has an advantage over optical systems due to its ability to operate in various environmental conditions, such as fog, smoke, and darkness.

    Primary Surveillance Radar (PSR)

    • PSR is capable of detecting and tracking targets, but it lacks Doppler frequency shift measurement, making it unable to determine target velocity.
    • The primary function of PSR is to detect and track targets, specifically for air traffic control.

    Radar Wavelength

    • Radar's specific wavelength allows it to penetrate atmospheric conditions, such as fog, smoke, and clouds, making it ideal for imagery acquisition.

    RADAR Systems

    • The primary function of RADAR systems is to detect and locate target objects using radio waves.
    • The basic principle behind RADAR systems is that they transmit radio waves, which bounce back when they encounter a target, allowing the system to detect and locate the object.

    Active Remote Sensing

    • Radar's primary advantage as an active remote sensing system is its ability to operate in various environmental conditions, including fog, smoke, and darkness.

    Development of Imaging Radar Systems

    • The development of imaging radar systems in the 1950s was driven by the need for accurate battlefield surveillance.

    Basic Types of Radar Systems

    • There are two basic types of radar systems: Primary Surveillance Radar (PSR) and Secondary Surveillance Radar (SSR).

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    Description

    Explore the principles and applications of radar imagery in remote sensing, including its development by the armed forces in the 1950s, its active sensing nature, and its ability to acquire data regardless of day or night. Learn about its capability to penetrate cloud cover due to its specific wavelength.

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