Elements of Remote Sensing MCQs

Question 1

Which one of the following frequencies is a GPS?

Accepted Answer

L1 with frequency 1575.42 MHz

Answer

L1 with frequency 1520 MHz

Answer

L1 with frequency 1227.6 MHz

Answer

L1 with frequency 1280.43 Hz

Question 2

The infrared portion of EMR lies between

Accepted Answer

0.7 to 14 gm

Answer

0.4 - 0.7 gm

Answer

0 5 mm to im

Answer

0.7- 1.3 gm

Question 3

Pick up the correct definition from the following with response to GIS.

Accepted Answer

All of these.

Answer

Common boundry between two areas of a locality is known as adjacency.

Answer

The area features which are wholly contained within another area feature, is known so containment.

Answer

The geometric property which describes the linkage between line features is defined as connectivity.

Question 4

Which one of the following statements is correct regarding the GPS satellites ?

Accepted Answer

All of these

Answer

The nominal altitude is about 20, 200 km

Answer

The inclination of axis satellite is 55?

Answer

The satellite transmits two L band signals (Li with 1575.42 MHz and L2 with 1276.6 MPT^)

Question 5

Which one of the following statements is correct ?

Accepted Answer

All of these

Answer

Each satellite of the GPS system transmits two L band signals.

Answer

The two L band signals are modulated by the Pseudorandom binary codes (PN).

Answer

The GPS receiver reads the specific code of the satellite.

Question 6

For obtaining accurate distance of the satellite

Accepted Answer

the carrier phase measurement technique is adopted

Answer

the GPS receiver slides its codes backwards until it synchronises with the satellite signals

Answer

the signal arrival time is corrected for tropospheric and ionospheric delays

Answer

All of these

Question 7

The code based GPS receivers are generally used for:

Accepted Answer

All of these

Answer

Vehicle tracking

Answer

Land navigation Cartography

Answer

Trans movement

Question 8

For accurate position fix, the three satellites :

Accepted Answer

must be widely separated and well distributed

Answer

must be along a common arc

Answer

must be in vertical line above the receiver

Answer

must be such that one satellite is overhead of the receiver and other two widely separated

Question 9

Due to pertubation of the orbit, satellite orbit parameters are frequently updated on measurements carried out by its

Accepted Answer

five ground stations

Answer

six ground stations

Answer

four ground stations

Answer

three ground stations