Question

At what distance from earth Indian Remote sensing satellites are placed?

• A. \(500 - 600 \text{ km}\)
• B. \(600 - 800 \text{ km}\)
• C. \(700 - 900 \text{ km}\)
• D. \(1000 - 1500 \text{ km}\)

Hint:

Remote sensing satellites are generally placed in:
• Sun-synchronous polar orbits
• Medium low Earth orbit ranges These orbits help capture consistent and repetitive Earth imagery for mapping and monitoring.

Answer 1

The Correct Option is C

Concept: Indian Remote Sensing (IRS) satellites are Earth observation satellites used for:
• Resource mapping,
• Environmental monitoring,
• Agriculture and forestry studies,
• Urban and regional planning,
• Disaster management. These satellites are generally placed in Sun-synchronous polar orbits to obtain consistent Earth imagery.

Step 1: Understand the orbital height of IRS satellites.
Indian Remote Sensing satellites are commonly placed at an altitude ranging between: \[ 700 - 900 \text{ km} \] above the Earth’s surface. This orbital range allows efficient remote sensing and repeated Earth coverage.

Step 2: Analyze the given options.
• \(\mathbf{500 - 600 \text{ km}}\) -- Lower than the common IRS satellite orbital range.
• \(\mathbf{600 - 800 \text{ km}}\) -- Partially correct but not the standard range generally associated with IRS satellites.
• \(\mathbf{700 - 900 \text{ km}}\) -- Correct orbital range for Indian Remote Sensing satellites. \checkmark
• \(\mathbf{1000 - 1500 \text{ km}}\) -- Much higher than the normal IRS satellite orbit. Therefore, the correct answer is: \[ {700 - 900 \text{ km}} \]