Remote Sensing Applications

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Remote Sensing Applications

• THE OCEANS
• Sea Floor Mapping

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Remote Sensing Applications

• LASER Airborne Depth Sounder
• (LADS)

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Remote Sensing Applications Sea Floor Mapping

• LADS
• Laser Airborne Depth Sounder
• Uses an IR laser to measure altitude from sea
  surface.
• Uses a Green laser to measure altitude from sea
  floor.
• Collects depth information
• Dependent on water quality

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Remote Sensing Applications Sea Floor Mapping
LADS
Comparison of area coverage for LADS boat-based
depth data collection.
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Remote Sensing Applications Sea Floor Mapping
LADS
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Remote Sensing Applications

• SONAR

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Remote Sensing Applications SONAR

• Sonar mapping of the ocean floor has three
  approaches
• Depth sounder
• Multi-beam sounder
• Side-scan

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Remote Sensing Applications SONAR

• Depth sounder
• Simple, vertical profile
• Cheap, easy to operate
• Grids required for area coverage
• Can be classified

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Remote Sensing Applications SONAR

• Depth sounder - Classification
• Uses return signal characteristics
• Ambiguous solutions (16million)
• Must be trained
• Grids required for area coverage

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Remote Sensing Applications SONAR

• Depth sounder - Classification

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Remote Sensing Applications SONAR

• Side-scan
• Similar to SLAR
• Positioning difficult
• Fish, cable, processing unit
• Provides picture of the sea floor

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Remote Sensing Applications SONAR

• Side-scan

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Remote Sensing Applications SONAR

• Side-scan

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Remote Sensing Applications SONAR

• Side-scan

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Remote Sensing Applications SONAR

• Side-scan

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Remote Sensing Applications SONAR

• Side-scan

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Remote Sensing Applications SONAR

• Side-scan

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Remote Sensing Applications SONAR

• Side-scan

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Remote Sensing Applications SONAR

• Side-scan

Scattering from the sea floor and surface
reflection.
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Remote Sensing Applications SONAR

• Side-scan

Material in the Water Column
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Remote Sensing Applications SONAR

• Side-scan

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Remote Sensing Applications SONAR

• Multi-beam SONAR
• Multiple beams give a swath coverage
• Records depth and position
• Must be motion corrected
• Can give 100 cover
• Expensive

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Remote Sensing Applications SONAR

• Multi-beam SONAR

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Remote Sensing Applications SONAR

• Multi-beam SONAR

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Remote Sensing Applications SONAR

• Multi-beam SONAR