Extra notes

• Side-Looking Airborne Radar (SLAR)


  The platform (aircraft or satellite) travels forward in the flight direction with the nadir directly beneath the platform. The microwave beam is transmitted obliquely at right angles to the direction of flight illuminating a swath.
• SLAR


  • Range refers to the across-track dimension perpendicular to the flight direction
  • Azimuth refers to the along-track dimension parallel to the flight direction
• Swath width


  The strip of the Earth's surface from which data are collected by a side-looking airborne radar. It is the width of the imaged scene in the range dimension.
• SLAR


  A real aperture radar primarily. Requires a reasonably large antenna for adequately angular resolution.
• With increasing altitude, the azimuthal resolution of SLAR decreases
• A very long antenna (i.e., large L) would be required to achieve a good resolution from a satellite
• Synthetic Aperture Radar (SAR)


  Used to acquire higher resolution
• Ground resolution cell


  The size increases on the side of the nadir as the distance between radar platform and the ground resolution cell increases. This causes a scale distortion, which must be accounted for.
• The same SLAR on a platform in a height of 600 km would achieve an azimuth-resolution of Ra = 4000 m
• Side-Looking Airborne Radar (SLAR)


  The platform (aircraft or satellite) travels forward in the flight direction with the nadir directly beneath the platform. The microwave beam is transmitted obliquely at right angles to the direction of flight illuminating a swath.

  
• SLAR


  • Range refers to the across-track dimension perpendicular to the flight direction
  • Azimuth refers to the along-track dimension parallel to the flight direction
• Swath width


  The strip of the Earth's surface from which data are collected by a side-looking airborne radar. It is the width of the imaged scene in the range dimension.
• SLAR


  A real aperture radar primarily. Requires a reasonably large antenna for adequately angular resolution.

  
• With increasing altitude, the azimuthal resolution of SLAR decreases
• A very long antenna (i.e., large L) would be required to achieve a good resolution from a satellite
• Synthetic Aperture Radar (SAR)

  Used to acquire higher resolution

  
• Ground resolution cell


  The size increases on the side of the nadir as the distance between radar platform and the ground resolution cell increases. This causes a scale distortion, which must be accounted for.
• The same SLAR on a platform in a height of 600 km would achieve an azimuth-resolution of Ra = 4000 m
• Side-Looking Airborne Radar (SLAR)


  The platform (aircraft or satellite) travels forward in the flight direction with the nadir directly beneath the platform. The microwave beam is transmitted obliquely at right angles to the direction of flight illuminating a swath.
• SLAR


  • Range refers to the across-track dimension perpendicular to the flight direction
  • Azimuth refers to the along-track dimension parallel to the flight direction
• Swath width


  The strip of the Earth's surface from which data are collected by a side-looking airborne radar. It is the width of the imaged scene in the range dimension.
• SLAR


  A real aperture radar primarily. Requires a reasonably large antenna for adequately angular resolution.
• With increasing altitude, the azimuthal resolution of SLAR decreases
• A very long antenna (i.e., large L) would be required to achieve a good resolution from a satellite
• Synthetic Aperture Radar (SAR)

  Used to acquire higher resolution
• Ground resolution cell


  The size increases on the side of the nadir as the distance between radar platform and the ground resolution cell increases. This causes a scale distortion, which must be accounted for.
• The same SLAR on a platform in a height of 600 km would achieve an azimuth-resolution of Ra = 4000 m