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Elements Of Remote Sensing

Elements Of Remote Sensing
The object of photo-interpretation is:

Recognition of objects
Identification
Judging the significance of objects
All of these

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

Wind waves
Electromagnetic waves
Sound waves
Electric waves

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

All of these
4.2 to 5.0, 7.0 to 15.0 μm and 1 cm to 30 cm
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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Elements Of Remote Sensing
Orbital radius of GPS satellites is approximately:

15,200 km
36,000 km
18,400 km
26,600 km

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Elements Of Remote Sensing
The normal altitude of GPS satellite is about

24,400 km
36,100 km
20,200 km
16,200 km

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Elements Of Remote Sensing
The refractive index of the ocean water:

Decreases with temperature
Increases with salinity
Increases with temperature
Decreases with salinity

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