15 Questions
What is the cause of the bright linear features that appear at approximately constant range in SAR images?
Specular reflection from targets within a very narrow slant range distance
What is the term used to describe the pattern of spatial tone variations in SAR images?
Texture
What is the effect of pulse compression on nadir returns in SAR images?
Restricts the bright return to a small number of range cells
What is the cause of scalloping in SAR images?
Improper estimation of Doppler Centroid
What is the term used to describe the unwanted brightness variation in SAR images due to radar artifacts?
Speckle
What is the primary purpose of multi-looking in SAR image processing?
To reduce speckle noise in the final image
What is the result of reducing speckle noise in SAR images?
Decreased radiometric resolution
What is the term for the statistical fluctuation or uncertainty associated with the brightness of each pixel in a radar image?
Speckle
What is the result of azimuth ambiguity in SAR images?
Ghosting of the target image
In what environment is spatial filtering typically performed to reduce speckle noise in SAR images?
In a digital image analysis environment
What is the result of local constructive interference in a radar image?
Bright speckles
In a radar image, what is the characteristic appearance of speckle noise?
A grainy 'salt and pepper' texture
What is the primary cause of fading in a coherent imaging system?
Variation in the phase delay caused by multiple targets
What is the term for the fixed relationship between waves in a beam of electromagnetic radiation?
Coherence
What type of imagery is inherently prone to speckle noise?
SAR imagery
Test your understanding of RADARSAT image interpretation, including challenges such as detecting signals over variable backgrounds, ambiguities, and interference from adjacent targets. This quiz covers key concepts in remote sensing and radar imaging.
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