ELEMENTS OF REMOTE SENSING QUIZ

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 areaWhich one of the following statements is/are correct?

1, 2

1, 3

1, 2, 3

2, 3

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Coherence of two electromagnetic waves takes place if their phase difference is:

None of these

Constant in time

Constant in time and space

Constant in space

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The interaction of the electromagnetic radiation produced with a specific wave length to illuminate a target on the terrain for studying its scattered radiance, is called:

None of these

Neutral remote sensing

Passive remote sensing

Active remote sensing

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Spatial variation in horizontal and vertical directions is caused due to:

Chemical weathering of rocks

All of these

Physical weathering of rocks

Biological weathering of rocks

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The most widely used antenna in GPS is

Horn antenna

Microstrip antenna

Slotted antenna

Parabolic antenna

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The value of energy quantum for radiation of any frequency is proportional to:

The frequency

The square root of the frequency

The square of the frequency

The reciprocal of the energy

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

None of these

Temporal variation

Spectral variation

Spatial variation

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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 = vλ

C = 1/λv

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The remote sensing techniques applied for the earth's surface features, is generally confined to the following wave lengths:

2.2 to 2.6, 3.0 to 3.6, 4.2 to 5.0 μm

All of these

4.2 to 5.0, 7.0 to 15.0 μm and 1 cm to 30 cm

0.4 to 1.3, 1.5 to 1.8, 2.2 to 2.6 μm

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The altitudinal distance of a geostationary satellite from the earth is about:

26,000 km

36,000 km

30,000 km

44,000 km

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