Civil Engineering :: Elements of Remote Sensing
- The ratio of the total solar radiant energy returned by a planetary body to the total radiant energy incident on the body, the called:
- Which one of the following parameters is accurate for DGPS?
- Which one of the following errors is produced by platform characteristics of the sensor?
- If electric permittivity and magnetic permeability of the medium are respectively ‘ε’ and ‘μ’, then the velocity (Cm) of the electromagnetic wave in the medium is given by:
- The altitudinal distance of a geostationary satellite from the earth is about:
- Which one of the following statements is correct regarding the GPS satellites?
- For C band Synthetic Aperture Radar (SAR) with Doppler band width of 1300 Hz, the coherence length loch is:
- Remote sensing techniques make use of the properties of ___________ emitted, reflected or diffracted by the sensed objects:
- A perfectly black body:
- Which one of the following parameters is considered to determine the reflectance of a vegetation canopy?
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A.
Positional accuracies ~ 1 - 2 m if rover is less than 1-2 km from the reference station |
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B.
Positional accuracies ~ 2 - 5 m if rover is less than 2-5 km from the reference station |
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C.
Positional accuracies ~ 5 - 10 m if rover is less than 5-10 km from reference station |
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D.
Positional accuracies ~ 5 - 10 m if rover is less than 25 km |