UPSC Previous Year Question | Prelims GS | 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.

  1. 1 only
  2. 2 and 3 only
  3. 3 only
  4. 1, 2 and 3

Answer

Correct Answer

1, 2 and 3

Explanation

Remote sensing can estimate vegetation chlorophyll content (spectral indices), map rice paddies and estimate associated greenhouse gas emissions, and measure land surface temperature. All three are correct.

Topics: applications of satellite data, remote sensing, science and technology, space technology