Civil Services Prep

Prelims 2015 · Science and Technology · Question 71

In which of the following activities are Indian Remote Sensing (IRS) satellites used?

  1. Assessment of crop productivity
  2. Locating groundwater resources
  3. Mineral exploration
  4. Telecommunications
  5. Traffic studies

Select the correct answer using the code given below.

  1. 1, 2 and 3 only
  2. 4 and 5 only
  3. 1 and 2 only
  4. 1, 2, 3, 4 and 5

Answer

1, 2 and 3 only

1. Assessment of crop productivity — Correct. IRS satellites are widely used in agricultural remote sensing for crop acreage, condition and yield/productivity estimation.
2. Locating groundwater resources — Correct. Remote sensing helps identify groundwater potential zones through geomorphology, drainage and landform analysis.
3. Mineral exploration — Correct. IRS data are used in geological mapping and identifying mineral-bearing structures/alteration zones.
4. Telecommunications — Incorrect. Telecommunications is the role of communication satellites like INSAT/GSAT, not IRS remote sensing satellites.
5. Traffic studies — Incorrect. While satellite imagery can support urban planning, IRS satellites are not primarily used for telecommunications/traffic management in the standard UPSC sense.
Therefore, 1, 2 and 3 only are correct.

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