Elements of Remote Sensing problems
- 1. Consider the following statements regarding the satellite imaging :
1. The satellite orbit is fixed in the inertial space
2. During successive across-track imaging, the earth rotates beneath the sensor
3. The satellite images a skewed area
Which one of the following statements is/are correct?
Options- A. 1, 2, 3
- B. 1, 3
- C. 2, 3
- D. 1, 2 Discuss
Correct Answer: 1, 2, 3
- 2. The ratio of the total solar radiant energy returned by a planetary body to the total radiant energy incident on the body, the called:
Options- A. reflectance
- B. reflectance factor
- C. albedo
- D. none of these Discuss
Correct Answer: albedo
- 3. Formation of snow occurs if the cloud temperature is
Options- A. just above the freezing point
- B. at the freezing point
- C. below the freezing point
- D. None of these Discuss
Correct Answer: below the freezing point
- 4. Which one of the following factors does not affect the scale of the air photographs :
Options- A. focal length
- B. flying height
- C. ground elevation
- D. None of these Discuss
Correct Answer: None of these
- 5. Electromagnetic spectrum contains :
Options- A. gamma rays (wave length < 10-10 m)
- B. ultraviolet rays (wave length < 10-6 m)
- C. infrared rays (wave length < 10-4 m)
- D. radio rays (wave length > 1 m)
- E. All of these Discuss
Correct Answer: All of these
- 6. If flying height of a spacecraft is H, the length of air base is B and the parallax difference between two points is dp, then the difference in height
Options- A.
- B.
- C.
- D.
Discuss
Correct Answer:
- 7. In GPS, receivers are used are ;
Options- A. electronic clocks
- B. atomic clocks
- C. quartz clocks
- D. mechanical clocks Discuss
Correct Answer: quartz clocks
- 8. Which one of the following attributes is not associated with digital maps
Options- A. colour
- B. symbology
- C. legends
- D. south arrow Discuss
Correct Answer: south arrow
- 9. Which one of the following statement is incorrect regarding the electromagnetic radiation?
Options- A. These are produced by the motion of electric charge
- B. The oscillation of charged particles sets up changing electric fields.
- C. The changing electric fields induce the changing magnetic fields in the surrounding medium.
- D. None of these Discuss
Correct Answer: None of these
- 10. Which one of the following statements is correct?
Options- A. Each satellite of the GPS system transmits two L band signals.
- B. The two L band signals are modulated by the Pseudorandom binary codes (PN).
- C. The GPS receiver reads the specific code of the satellite.
- D. The PN code determines the time taken by the receiver to reach the receiver which is converted into distance
- E. All of these Discuss
Correct Answer: All of these
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