SAR FUNDAMENTALS ADVANCED
EXAM QUESTIONS AND ANSWERS
100% VERIFIED. JUST RELEASED
1. Which factor primarily determines the slant range resolution in a Synthetic Aperture Radar
system?
A. The antenna length
B. The carrier frequency
C. The bandwidth of the transmitted pulse
D. The velocity of the platform
Answer: C
Conceptual Explanation: Slant range resolution is inversely proportional to the
bandwidth (B) of the transmitted pulse, according to the formula delta_r = c / (2 * B).
2. In SAR terminology, what is the theoretical limit for the finest achievable azimuth
resolution?
A. Half of the physical antenna length
B. Proportional to the wavelength
C. Twice the distance to the target
D. Independent of the antenna size
,Answer: A
Conceptual Explanation: In a focused SAR system, the azimuth resolution is theoretically
independent of range and wavelength, being approximately equal to half the physical
length of the antenna (L/2).
3. What geometric distortion occurs when the top of a tall object is closer to the radar than its
base in the slant range direction?
A. Foreshortening
B. Shadowing
C. Layover
D. Slant-range compression
Answer: C
Conceptual Explanation: Layover occurs when the radar pulse reaches the top of a high-
elevation feature before it reaches the base, causing the top to be mapped ‘ahead’ of the
base in the image.
4. Why must a SAR system be side-looking?
A. To increase the signal-to-noise ratio
B. To maximize the Doppler shift
C. To resolve targets symmetrically positioned about the nadir track
D. To reduce atmospheric attenuation
, Answer: C
Conceptual Explanation: A nadir-looking radar would see targets at equal distances on
either side of the track simultaneously, making it impossible to distinguish between left
and right based on range delay.
5. Which radar band corresponds to the approximate frequency range of 1.2 to 1.4 GHz?
A. X-Band
B. C-Band
C. Ku-Band
D. L-Band
Answer: D
Conceptual Explanation: L-Band operates in the 1-2 GHz range (wavelength approx 24
cm), which is useful for penetrating forest canopies.
6. The ‘Speckle’ effect in SAR imagery is physically caused by:
A. Constructive and destructive interference of coherent backscatter
B. Electronic thermal noise in the receiver
C. Atmospheric turbulence
D. Quantization errors in the Analog-to-Digital converter
Answer: A
EXAM QUESTIONS AND ANSWERS
100% VERIFIED. JUST RELEASED
1. Which factor primarily determines the slant range resolution in a Synthetic Aperture Radar
system?
A. The antenna length
B. The carrier frequency
C. The bandwidth of the transmitted pulse
D. The velocity of the platform
Answer: C
Conceptual Explanation: Slant range resolution is inversely proportional to the
bandwidth (B) of the transmitted pulse, according to the formula delta_r = c / (2 * B).
2. In SAR terminology, what is the theoretical limit for the finest achievable azimuth
resolution?
A. Half of the physical antenna length
B. Proportional to the wavelength
C. Twice the distance to the target
D. Independent of the antenna size
,Answer: A
Conceptual Explanation: In a focused SAR system, the azimuth resolution is theoretically
independent of range and wavelength, being approximately equal to half the physical
length of the antenna (L/2).
3. What geometric distortion occurs when the top of a tall object is closer to the radar than its
base in the slant range direction?
A. Foreshortening
B. Shadowing
C. Layover
D. Slant-range compression
Answer: C
Conceptual Explanation: Layover occurs when the radar pulse reaches the top of a high-
elevation feature before it reaches the base, causing the top to be mapped ‘ahead’ of the
base in the image.
4. Why must a SAR system be side-looking?
A. To increase the signal-to-noise ratio
B. To maximize the Doppler shift
C. To resolve targets symmetrically positioned about the nadir track
D. To reduce atmospheric attenuation
, Answer: C
Conceptual Explanation: A nadir-looking radar would see targets at equal distances on
either side of the track simultaneously, making it impossible to distinguish between left
and right based on range delay.
5. Which radar band corresponds to the approximate frequency range of 1.2 to 1.4 GHz?
A. X-Band
B. C-Band
C. Ku-Band
D. L-Band
Answer: D
Conceptual Explanation: L-Band operates in the 1-2 GHz range (wavelength approx 24
cm), which is useful for penetrating forest canopies.
6. The ‘Speckle’ effect in SAR imagery is physically caused by:
A. Constructive and destructive interference of coherent backscatter
B. Electronic thermal noise in the receiver
C. Atmospheric turbulence
D. Quantization errors in the Analog-to-Digital converter
Answer: A
