Elements of Remote Sensing MCQs

Question 1

The various stages occuring in GPS system are described below :1, Generation of an output to the user2. Detection of the GPS signal3. Processing the data in the built-in-computer4. Decoding the GPS signal.The correct sequence of the stages is :

Accepted Answer

2,4,3,1

Answer

1,2,3,4

Answer

2,3,4,1

Answer

3,1,2,4

Question 2

The most widely used antenna in GPS is

Accepted Answer

Microstrip antenna

Answer

Parabolid antenna

Answer

Horn antenna

Answer

Slotted antenna

Question 3

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

Accepted Answer

All the above

Answer

Satellite dependent baises due to uncertainty in the orbital parameters of the satellite.

Answer

Receiver-depandent biases due to clock stability with line

Answer

Signal propagation baises due to the sphere and troposphere propogation.

Question 4

DGPS is based on the concept that bais errors in the position of locations in a given local area, are same if their distances are within

Accepted Answer

100 km

Answer

25 km

Answer

50 km

Answer

75 km

Question 5

Which one of the following parameters is accurate for DGPS.

Accepted Answer

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

Answer

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

Answer

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

Answer

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

Question 6

GPS has been widely recognized as accurate, fast and cost-effective method for the following :

Accepted Answer

All of these

Answer

Collection of the geographic coordinate data used in GIS

Answer

for movement of navigation

Answer

For determination of precise orbit and altitude of low earth orbiting satellites

Question 7

Geodimeter is based on :

Accepted Answer

propogation of modulated light waves

Answer

propogation of infrared radiation

Answer

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

Answer

high frequency radio waves.

Question 8

The object of photo-intepretation is:

Accepted Answer

All of these

Answer

identification

Answer

recognition of objects

Answer

judging the significance of objects

Question 9

The range measurements in GPS are made with :

Accepted Answer

2L - band frequencies

Answer

3 L - band frequencies

Answer

2 C - band frequencies

Answer

3 C - band frequencies