ELEMENTS OF REMOTE SENSING QUIZ

For C band Synthetic Aperture Radar (SAR) with Doppler band width of 1300 Hz, the coherence length loch is:

130 km

500 km

230 km

250 km

TRUE ANSWER : ?
YOUR ANSWER : ?

Who coined the term, ‘Remote sensing’.

Wilbur Wright, an Italian scientist

Gaspard Felix Tournachon, a French scientist

Evelyn L. Pruitt, a geographer

None of these

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A passive sensor uses:

None of these

Its own source of energy

Flash light as a source of energy

Sun as the source of energy

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The object of photo-interpretation is:

All of these

Recognition of objects

Judging the significance of objects

Identification

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Electromagnetic spectrum contains:

Ultraviolet rays (wave length < 10⁻⁶ m)

Infrared rays (wave length < 10⁻⁴ m)

All of these

Gamma rays (wave length < 10⁻¹⁰ m)

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Repetitive observations of the same area at equal interval of time are useful to monitor the dynamic phenomena:

Vegetative cover

Snow cover

All of these

Cloud evolution

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YOUR ANSWER : ?

Which one of the following frequency regions is a part of sun's radiation?

Radio frequency region

Infrared frequency region

All of these

Ultraviolet frequency region

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The coherence length over which there is a strong relationship between amplitudes is;

The square of the bandwidth

None of these

Inversely proportional to the bandwidth

Directly proportional to the bandwidth

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YOUR ANSWER : ?

Which one of the following relationship between the wave length (λ), and frequency and the speed (C) of the electromagnetic wave is correct?

C = λ/v

C = v + λ

C = 1/λv

C = vλ

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YOUR ANSWER : ?

The various stages occuring in GPS system are described below:<br/>1. Generation of an output to the user<br/>2. Detection of the GPS signals<br/>3. Processing the data in the built-in-computer<br/>4. Decoding the GPS signal.<br/>The correct sequence of the stages is:

2, 3, 4, 1

3, 1, 2, 4

2, 4, 3, 1

1, 2, 3, 4

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