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Elements of Remote Sensing

A and B are two towers of equal height diametrically opposite on either side of the nadir point, at 3 km and 5 km distances. Which one of the following statements is correct?

Elements of Remote Sensing /
A and B are two towers of equal height diametrically opposite on either side of the nadir point, at 3 km and 5 km distances. Which one of the following statements is correct?

A. Height displacement of A will be less than that of B
B. Height displacement of B will be less than that of A
C. Height displacement of A and B is equal
D. Height displacement of A and B will be towards each other

A and B are two towers of equal height diametrically opposite on either side of the nadir point, at 3 km and 5 km distances. Which one of the following statements is correct? Read More »

Elements of Remote Sensing

Consider the following statements regarding the satellite imaging_________________?

Elements of Remote Sensing /
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?
A. 1, 2, 3
B. 1, 3
C. 2, 3
D. 1, 2

Consider the following statements regarding the satellite imaging_________________? Read More »

Elements of Remote Sensing

The entire range of the electromagnetic spectrum spans a large spectrum of wave lengths varying from__________________?

Elements of Remote Sensing /
The entire range of the electromagnetic spectrum spans a large spectrum of wave lengths varying from__________________?

A. 10-10 to 106 m
B. 10-8 to 106 m
C. 10-10 to 1010 m
D. 10-8 to 108 m

The entire range of the electromagnetic spectrum spans a large spectrum of wave lengths varying from__________________? Read More »

Elements of Remote Sensing

Which one of the following residual biases involves the GPS accuracy ?

Elements of Remote Sensing /
Which one of the following residual biases involves the GPS accuracy ?

A. Satellite dependent biases due to uncertainty in the orbital parameters of the satellite
B. Receiver -dependent biases due to clock stability with line
C. Signal propagation biases due to the sphere and troposphere propagation
D. All the above

Which one of the following residual biases involves the GPS accuracy ? Read More »

Elements of Remote Sensing

Critical angle of electromagnetic radiation takes place if__________________?

Elements of Remote Sensing /
Critical angle of electromagnetic radiation takes place if__________________?

A. Angle of incidence is equal to angle of refraction
B. Angle of incidence is greater than the angle of refraction
C. Angle of incidence is equal to 90°
D. Angle of refraction is equal to 90°

Critical angle of electromagnetic radiation takes place if__________________? Read More »

Elements of Remote Sensing

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___________________?

Elements of Remote Sensing /
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___________________?

A. h = dp/(B/H)
B. h = (B/H) dp
C. h = dp/(H/B)
D. h = (H/B) dp

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___________________? Read More »

Elements of Remote Sensing

Pick up the correct statement from the following_________________?

Elements of Remote Sensing /
Pick up the correct statement from the following_________________?

A. When the electric field oscillates in the direction of the electric vector, a plane polarised wave is formed
B. When the electric vector is in the plane of incidence, vertical polarisation is formed
C. When the electric vector is at right angles to the plane of incidence, horizontal polarization wave is formed
D. All of these

Pick up the correct statement from the following_________________? Read More »

Elements of Remote Sensing

The arrangement of terrain features which provides attributes: the shape, size and texture of objects, is called_________________?

Elements of Remote Sensing /
The arrangement of terrain features which provides attributes: the shape, size and texture of objects, is called_________________?

A. Spectral variation
B. Spatial variation
C. Temporal variation
D. None of these

The arrangement of terrain features which provides attributes: the shape, size and texture of objects, is called_________________? Read More »

Elements of Remote Sensing