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UPSC Prelims 2019 Paper-1 📅 02 Jun, 2019

For the measurement/estimation of which of the following are satellite images/remote sensing data used?
1. Chlorophyll content in the vegetation of a specific location
2. Greenhouse gas emissions from rice paddies of a specific location
3. Land surface temperatures of a specific location

Select the correct answer using the code given below.

A
1 only
B
2 and 3 only
C
3 only
D
1, 2 and 3
Result Summary
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UPSC Prelims
2019 • 02 Jun, 2019 • Paper-1
For the measurement/estimation of which of the following are satellite images/remote sensing data used?
1. Chlorophyll content in the vegetation of a specific location
2. Greenhouse gas emissions from rice paddies of a specific location
3. Land surface temperatures of a specific location

Select the correct answer using the code given below.
Correct Answer
1, 2 and 3
Application 1 Analysis: Modern multispectral and hyperspectral satellite sensors can measure the reflectance of light from plant leaves, which allows scientists......
Ref/Book : UPSC Prelims 2019
Ref. Subject Science and Technology
Chapter -
Ref. Topic Space Technology
Pg. No -
💡 Analysis & Explanation
Application 1 Analysis ▼
Modern multispectral and hyperspectral satellite sensors can measure the reflectance of light from plant leaves, which allows scientists to estimate the chlorophyll concentration and overall vegetation health (using indices like NDVI).
Application 2 Analysis ▼
Specialized remote sensing instruments can track and estimate the atmospheric concentrations and localized emissions of greenhouse gases, including methane generated from flooded agricultural lands like rice paddies.
Application 3 Analysis ▼
Thermal infrared sensors aboard satellites continually monitor and map precise Land Surface Temperatures (LST) across the globe.
Conclusion ▼
Remote sensing technology is incredibly versatile and applies to all three scenarios, making option D correct.
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