Introduction to Synthetic Aperture Radar: Homework 1
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1. What are the advantages of radar sensors?
they can “see” through clouds
they can “see” the surface of the earth day/night
they can penetrate through a medium
all of the above
2. Wavelength is inversely related to frequency.
3. What are the three radar parameters that need to be considered for any study?
wavelength, polarization, and dielectric
wavelength, incidence angle, and structure
wavelength, polarization, incidence angle
incidence angle, dielectric, and structure
4. What is the relationship between wavelength and penetration depth?
the longer the wavelength the lesser the penetration depth
the shorter the wavelength the greater the penetration depth
the longer the wavelength the greater the penetration depth
none of the above
5. What do radar images provide information on?
dielectric and roughness
dielectric and temperature
roughness and soil moisture
roughness and barometric pressure
6. What types of polarizations are commonly used in radar?
horizontal and trihedral
horizontal and vertical
triangular and vertical
vertical and trihedral
7. What are the three main backscattering mechanisms?
specular reflection, triple-bounce, double-bounce
volume scattering, triple-bounce, roof scattering
roof scattering, double-bounce, specular reflection
specular reflection, volume scattering and double-bounce
8. What is speckle?
triangular features in the image
salt and pepper texture in an image
circular features in the image
none of the above
9. How can speckle be reduced?
multilooking and spatial filtering
10. What wavelength does SENTINEL-1A/B SAR’s use?
11. How would you use radar remote sensing for your specific application?
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