Podcast
Questions and Answers
What is the cause of the bright linear features that appear at approximately constant range in SAR images?
What is the cause of the bright linear features that appear at approximately constant range in SAR images?
- Diffuse reflection from vegetated areas
- Scattering returns from calm water surfaces
- Constructive interference from adjacent targets
- Specular reflection from targets within a very narrow slant range distance (correct)
What is the term used to describe the pattern of spatial tone variations in SAR images?
What is the term used to describe the pattern of spatial tone variations in SAR images?
- Tone
- Speckle
- Scattering returns
- Texture (correct)
What is the effect of pulse compression on nadir returns in SAR images?
What is the effect of pulse compression on nadir returns in SAR images?
- Eliminates the effect of scattering returns
- Restricts the bright return to a small number of range cells (correct)
- Reduces the strength of the returns
- Increases the range of the returns
What is the cause of scalloping in SAR images?
What is the cause of scalloping in SAR images?
What is the term used to describe the unwanted brightness variation in SAR images due to radar artifacts?
What is the term used to describe the unwanted brightness variation in SAR images due to radar artifacts?
What is the primary purpose of multi-looking in SAR image processing?
What is the primary purpose of multi-looking in SAR image processing?
What is the result of reducing speckle noise in SAR images?
What is the result of reducing speckle noise in SAR images?
What is the term for the statistical fluctuation or uncertainty associated with the brightness of each pixel in a radar image?
What is the term for the statistical fluctuation or uncertainty associated with the brightness of each pixel in a radar image?
What is the result of azimuth ambiguity in SAR images?
What is the result of azimuth ambiguity in SAR images?
In what environment is spatial filtering typically performed to reduce speckle noise in SAR images?
In what environment is spatial filtering typically performed to reduce speckle noise in SAR images?
What is the result of local constructive interference in a radar image?
What is the result of local constructive interference in a radar image?
In a radar image, what is the characteristic appearance of speckle noise?
In a radar image, what is the characteristic appearance of speckle noise?
What is the primary cause of fading in a coherent imaging system?
What is the primary cause of fading in a coherent imaging system?
What is the term for the fixed relationship between waves in a beam of electromagnetic radiation?
What is the term for the fixed relationship between waves in a beam of electromagnetic radiation?
What type of imagery is inherently prone to speckle noise?
What type of imagery is inherently prone to speckle noise?
