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Elements Of Remote Sensing

Elements Of Remote Sensing
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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Elements Of Remote Sensing
The infrared portion of EMR lies between

0.5 mm to 1 μm
0.7 - 1.3 μm
0.7 to 14 μm
0.4 - 0.7 μm

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Elements Of Remote Sensing
The reflectance from a surface is called specular reflection if it follows:

Planktan
All of these
Snell’s law
Lambert

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Elements Of Remote Sensing
Critical angle of electromagnetic radiation takes place if

Angle of incidence is greater than the angle of refraction
Angle of incidence is equal to 90°
Angle of refraction is equal to 90°
Angle of incidence is equal to angle of refraction

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

230 km
500 km
130 km
250 km

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Elements Of Remote Sensing
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 area
Which one of the following statements is/are correct?

1, 3
1, 2, 3
1, 2
2, 3

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