Remote Sensing, Principles and Applications

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Remote Sensing, Principles and Applications

• Oceans 3 - SONAR

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Remote Sensing, Principles and Applications SONAR

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

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Remote Sensing, Principles and 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, Principles and 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, Principles and Applications SONAR

• Depth sounder - Classification

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Remote Sensing, Principles and 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, Principles and Applications SONAR

• Side-scan

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Remote Sensing, Principles and Applications SONAR

• Side-scan

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Remote Sensing, Principles and Applications SONAR

• Side-scan

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Remote Sensing, Principles and 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, Principles and Applications SONAR

• Multi-beam SONAR

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Remote Sensing, Principles and Applications SONAR

• Multi-beam SONAR

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Remote Sensing, Principles and Applications SONAR

• Multi-beam SONAR