5. Active & Advanced Sensors

Radar Fundamentals — Quiz

Test your understanding of radar fundamentals with 5 practice questions.

Practice Questions

Question 1

Which of the following best describes the phenomenon of volume scattering in RADAR remote sensing?

Question 2

In the context of RADAR, what is the primary factor that determines the penetration depth of a radar signal into a medium?

Question 3

Consider a SAR system acquiring two images over the same area at different times. If there has been significant change in the scatterers (e.g., vegetation growth, soil moisture variation) between the acquisitions, what would be the expected effect on the interferometric coherence?

Question 4

Which of the following polarization combinations is generally most sensitive to surface roughness for bare soil surfaces, particularly at moderate incidence angles?

Question 5

The Rayleigh criterion is used to determine if a surface is considered rough or smooth for a given radar wavelength and incidence angle. A surface is considered 'smooth' if its root mean square (RMS) height variation ($h$) satisfies which of the following conditions?