GISP Remote Sensing and Image Analysis

Question 1

Which type of remote sensing uses its own energy source to illuminate a target and record the reflected signal?

Accepted Answer

Active remote sensing

Answer

Passive remote sensing

Answer

Thermal remote sensing

Answer

Hyperspectral remote sensing

Question 2

What is the Normalized Difference Vegetation Index (NDVI) primarily used for in remote sensing?

Accepted Answer

Assessing vegetation health and density

Answer

Measuring water depth

Answer

Detecting urban heat islands

Answer

Mapping soil moisture levels

Question 3

In Landsat 8 imagery, which band combination is most commonly used for a standard true-color composite?

Accepted Answer

Bands 4-3-2

Answer

Bands 7-5-3

Answer

Bands 5-4-3

Answer

Bands 6-5-4

Question 4

What does spatial resolution refer to in the context of satellite imagery?

Accepted Answer

The smallest distinguishable ground feature size in an image

Answer

The number of spectral bands captured

Answer

The frequency of satellite revisit time

Answer

The radiometric bit depth of the sensor

Question 5

Which atmospheric correction method converts raw digital numbers to surface reflectance by removing atmospheric effects using sensor-measured path radiance?

Accepted Answer

Dark object subtraction (DOS)

Answer

Empirical line correction

Answer

MODTRAN radiative transfer

Answer

Histogram equalization

Question 6

What is the primary advantage of hyperspectral sensors over multispectral sensors?

Accepted Answer

Hundreds of narrow contiguous spectral bands enabling detailed material identification

Answer

Wider swath coverage

Answer

Higher spatial resolution

Answer

Faster revisit times