MCQ_Lecture2_Remote sensing fundamentals

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What is the primary difference between FOV and IFOV?

FOV is the minimum distance, while IFOV is the maximum distance
FOV is the whole area visible, while IFOV is the smallest detail within that area (correct)
FOV is the area visible at a close distance, while IFOV is the area visible at a far distance
FOV is the area visible horizontally, while IFOV is the area visible vertically

What is the advantage of a small IFOV?

It is better suited for high spatial resolution (correct)
It is less sensitive to scene radiance
It can distinguish very slight energy differences
It is more sensitive to background electronic noise

What is the relationship between IFOV and signal-to-noise ratio?

IFOV is inversely proportional to signal-to-noise ratio
A large IFOV results in a higher signal-to-noise ratio (correct)
IFOV has no effect on signal-to-noise ratio
A small IFOV results in a higher signal-to-noise ratio

What is the trade-off in designing multispectral scanner systems?

Between high spatial resolution and high radiometric resolution (C) Signup and view all the answers

What is the benefit of a large IFOV?

It is more sensitive to scene radiance (B) Signup and view all the answers

What is not mentioned as a type of image resolution?

Temporal resolution (D) Signup and view all the answers

What is the main difference between FOV and IFOV?

FOV is the full field of view, while IFOV is the instantaneous field of view (A) Signup and view all the answers

What is the purpose of the Enhanced Thematic Mapper Plus (ETM+) sensor?

To collect data in multiple spectral bands (C) Signup and view all the answers

Which of the following satellites has a medium resolution sensor?

Landsat (D) Signup and view all the answers

What is the benefit of a higher repeat cycle in a satellite?

It allows for more frequent revisits of the same area (D) Signup and view all the answers

What is the main difference between a medium resolution satellite and a high resolution satellite?

The spatial resolution of the image (D) Signup and view all the answers

What is the main advantage of a smaller IFOV?

It increases the resolution of the image (D) Signup and view all the answers

What is the characteristic of a geostationary orbit in terms of its period of rotation?

Equal to the period of rotation of the Earth (A) Signup and view all the answers

What determines the ground track of a satellite in a polar orbit?

The satellite's inclination over the Earth's polar regions (D) Signup and view all the answers

What is the advantage of a geostationary orbit in terms of revisit time?

Multiple observations per day (D) Signup and view all the answers

What is the purpose of an oscillating mirror in an across-track scanner?

To scan the ground in a perpendicular direction (D) Signup and view all the answers

What is the relationship between the angular field of view (θ) and the swath of a scanner?

The swath is equal to 2H*tan(θ/2) (A) Signup and view all the answers

What type of scanner is characterized by a linear array of detectors?

Along-track scanner (A) Signup and view all the answers