ELEMENTS OF REMOTE SENSING QUIZ

Sensor IFOV is proportional to:

tan²

sec²

cos²

sin²

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

Constant in time and space

Constant in space

None of these

Constant in time

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

250 km

500 km

230 km

130 km

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

Spectral variation

All of these

Spatial variation

Temporal variation

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Which one of the following parameters is accurate for DGPS?

Positional accuracies ~ 5 - 10 m if rover is less than 25 km

Positional accuracies ~ 1 - 2 m if rover is less than 1-2 km from the reference station

Positional accuracies ~ 5 - 10 m if rover is less than 5-10 km from reference station

Positional accuracies ~ 2 - 5 m if rover is less than 2-5 km from the reference station

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

The nominal altitude is about 20,200 km

The inclination of axis satellite is 55°

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

All of these

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For interpolation of satellite data used for monitoring dynamic changes that occurs on the earth surface, the most suitable orbit for the satellite is:

Near polar orbit

Circular orbit

Sun-synchronous orbit

None of these

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The basic requirement of any sensor system is:

Spectral resolution

Spatial resolution

Radiometric resolution

All of these

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The maximum sun's radiation occurs around:

0.7 μ wave length

0.55 μ wave length

None of these

0.4 μm wave length

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A perfectly black body:

Absorbs all the radiations of every wave lengths

Is a diffuse emitter

All listed here

Emits power of every wave length

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