ELEMENTS OF REMOTE SENSING QUIZ

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

Signal propagation biases due to the sphere and troposphere propagation

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

All listed here

Receiver-dependent biases due to clock stability with line

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Remote sensing techniques make use of the properties of ___________ emitted, reflected or diffracted by the sensed objects:

Electromagnetic waves

Electric waves

Wind waves

Sound waves

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

Altitude variation

Panoramic distortion

Earth rotation

Scan skew

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The reflection of solar energy is characterized by the water content in the leaf, in the reflective optical infrared:

Visible (0.4 - 0.7 μm) region

Near-IR (0.7 - 1.3 μm) region

None of these

Short wave-IR (1.3 - 2.7 μm) region

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The basic requirement of any sensor system is:

Spectral resolution

All of these

Spatial resolution

Radiometric resolution

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

Flying height

None of these

Ground elevation

Focal length

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

All of these

Infrared frequency region

Radio frequency region

Ultraviolet frequency region

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

Look angle

All of these

Solar zenith angle

Azimuth angle

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The instruments which provide electromagnetic radiation of specified wave length or a band of wave lengths to illuminate the earth surface are called:

Sensors

Passive sensors

Active sensors

None of these

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

130 km

230 km

250 km

500 km

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