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Cards In This Set
| Front | Back |
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Two Scanner Types
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Across Track (whiskbroom)
Along Track (Pushbroom) |
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Across Track Scanning
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Whisk Broom
Scan lines at right angle to flight line 2-D |
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IFOV
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Instantaneous Field of View
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What is IFOV
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Cone angle within which incident energy is focused on the detector
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IFOV Equation
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D=H'*B
D=diameter of circular ground area H'= Flying height above terrian B=IFOV of system (radians) |
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Where is the IFOV smallest?
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At the nadir
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What happens to spatial resolution as the scan moves away from the Nadir?
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It decreases (the smaller footprint on the ground results in more samples)
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What happens to radiometric resolution as the scan moves away from the NAdir?
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It increases (A larger IFOV collects more energy)
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As spatial resolution decreases....
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Radiometric resoltuion increases
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Dwell time....
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Increases radiometric resolution
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Spectral resolution decreases when
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Bandwidth increases
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Tangential Scale Distrotion occurs
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On across track scanners.
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