ELEMENTS OF REMOTE SENSING QUIZ

36,000 km

18,400 km

15,200 km

26,600 km

Decreases with salinity

Decreases with temperature

Increases with salinity

Increases with temperature

Three ground stations

Six ground stations

Four ground stations

Five ground stations

Propagation of modulated light waves

High frequency radio waves

The visible light as carrier with frequency of the order of 5 × 1014 Hz

Propagation of infrared radiation

Radiant energy (Q)

All of these

Radiant intensity (I)

Radiant flux (φ)

Both (A) and (B)

Both the fields are at right angles to the direction of propagation

Directions of both the fields are orthogonal

Neither (A) nor (B)

All listed here

Satellite dependent biases due to uncertainty in the orbital parameters of the satellite

Receiver-dependent biases due to clock stability with line

Signal propagation biases due to the sphere and troposphere propagation

Positional accuracies ~ 1 - 2 m if rover is less than 1-2 km from the reference station

Positional accuracies ~ 5 - 10 m if rover is less than 5-10 km from reference station

Positional accuracies ~ 5 - 10 m if rover is less than 25 km

Positional accuracies ~ 2 - 5 m if rover is less than 2-5 km from the reference station

None of these

Passive sensors

Active sensors

Sensors

1, 2

2, 3

1, 3

1, 2, 3