ELEMENTS OF REMOTE SENSING QUIZ

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

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

All of these

2.2 to 2.6, 3.0 to 3.6, 4.2 to 5.0 μm

0.4 to 1.3, 1.5 to 1.8, 2.2 to 2.6 μm

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

230 km

500 km

250 km

130 km

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Which one of the following factors does not affect the scale of the air photographs?

None of these

Flying height

Ground elevation

Focal length

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Pick up the important characteristic of a target which facilitates its identification from the following:

Spatial variation

Spectral variation

Temporal variation

All of these

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

The square of the frequency

The frequency

The square root of the frequency

The reciprocal of the energy

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Which one of the following parameters is considered to determine the reflectance of a vegetation canopy?

All of these

Solar zenith angle

Look angle

Azimuth angle

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Which one of the following statement is incorrect regarding the electromagnetic radiation?

These are produced by the motion of electric charge

None of these

The changing electric fields induce the changing magnetic fields in the surrounding medium

The oscillation of charged particles sets up changing electric fields

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

Receiver-dependent biases due to clock stability with line

All listed here

Signal propagation biases due to the sphere and troposphere propagation

Satellite dependent biases due to uncertainty in the orbital parameters of the satellite

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

100 km

50 km

25 km

75 km

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The normal altitude of GPS satellite is about

24,400 km

16,200 km

20,200 km

36,100 km

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