Question

The Indian Remote Sensing Satellite (IRS):
(A) Look over a fixed point at the same local time
(B) Are at a low altitude ($<$1000 km)
(C) Are used for weathering forecasting?
(D) Have large agricultural and natural resources application
(E) Provide service to telecommunications

• A. (A), (B), and (D) only
• B. (A), (B), and (C) only
• C. (A), (B), (C), and (D)
• D. (A), (D), and (E) only

Hint:

Differentiate between IRS (resource satellites) and INSAT (communication/weather) systems in Indian remote sensing programs.

Answer 1

The Correct Option is A

IRS satellites are sun-synchronous and polar orbiting (low altitude), useful for fixed-time imaging and agricultural applications. They do not provide telecom services or weather forecasting.

Answer 2

Elimination approach: Examine each statement about IRS satellites individually.
(A) True - IRS satellites are sun-synchronous, so they cross the same latitude at the same local solar time on every pass.
(B) True - sun-synchronous orbits used by IRS are near-polar and low-altitude, well under 1000 km.
(C) False - weather forecasting is the job of geostationary meteorological satellites such as INSAT, not IRS.
(D) True - IRS was purpose-built for agricultural monitoring, forest cover assessment, and natural resource mapping.
(E) False - telecommunication relay is handled by INSAT/GSAT satellites, not IRS.
Since only (A), (B) and (D) hold up under this check, that combination is the correct option.