20 Questions
What is the primary factor that determines the type and degree of relief displacement in a radar image?
Local slope of the ground
What occurs when the angle of radar-facing slope is less than θi?
Foreshortening
What happens when the local incident angle is 90º?
Shadow is formed
What is the pattern of horizontal displacement for a radar sensor?
Decreases with incident angle
What is the result when the angle of radar-facing slope is equal to θi?
Top and base occupy the same slant-range position
What is the direction of terrain distortion in radar imagery?
Perpendicular to the flight path
What is the term for the distortion of SAR imagery caused by the radar beam's interaction with the terrain?
Scene distortion
How are tall objects displaced in radar imagery?
Toward the sensor
What is the viewing perspective of imaging radars?
Side-looking
What type of relief displacement is inherent in aerial photography?
One-dimensional
What is radar shadowing in the context of radar imagery?
Appearance of dark areas where the radar signal is blocked
What is the effect of foreshortening on a radar image?
It results in a relatively brighter appearance of slopes facing the radar
At what incident angle is foreshortening at a maximum?
0°
What is the trade-off when selecting incident angle?
Between foreshortening and shadowing
What happens to foreshortening effects as incident angles increase?
They are reduced
What is the result of layover in radar image processing?
The top of the feature is displaced relative to its base
What is the main challenge in interpreting SAR images with layover?
Each pixel may contain scatter from more than one area
At what incident angle is layover more prevalent?
Small incident angles
What is the relationship between layover and foreshortening?
Layover is a type of foreshortening
What is the result of extreme horizontal displacement in layover?
The top of the mountain is mapped 'overlaying' the fore slope
Test your knowledge on the principles of remote sensing, including foreshortening and layover, which affect the accuracy of image interpretation. Learn how to identify and correct these errors in remote sensing data. This quiz is perfect for students and professionals in the field of geospatial science.
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