ELEMENTS OF REMOTE SENSING QUIZ

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

The satellite transmits two L band signals (L1 with 1575.42 MHz and L2 with 1276.6 MHz)

The inclination of axis satellite is 55°

The nominal altitude is about 20,200 km

All of these

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Which one of the following helps to identify the objects on the earth surface?

Atmospheric window

None of these

Radiometric error

Signature

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Electromagnetic radiation:

Is capable to travel across space

All of these

Once generated, remains self-propagating

Produces a time varying magnetic field and vice versa

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Electromagnetic spectrum contains:

Gamma rays (wave length < 10⁻¹⁰ m)

Ultraviolet rays (wave length < 10⁻⁶ m)

All of these

Infrared rays (wave length < 10⁻⁴ m)

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Consider the following statements regarding the satellite imaging:<br/>1. The satellite orbit is fixed in the inertial space<br/>2. During successive across-track imaging, the earth rotates beneath the sensor<br/>3. The satellite images a skewed area<br/>Which one of the following statements is/are correct?

1, 2

1, 2, 3

1, 3

2, 3

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Which one of the following attributes is not associated with digital maps

Symbology

Legends

South arrow

Color

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The object of photo-interpretation is:

Recognition of objects

Identification

All of these

Judging the significance of objects

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Which one of the following geometric errors of satellite sensors is random?

Panoramic distortion

Earth rotation

Altitude variation

Scan skew

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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 reciprocal of the energy

The square of the frequency

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

None of these

Inversely proportional to the bandwidth

The square of the bandwidth

Directly proportional to the bandwidth

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