Question

Given below are two statements:
Statement I: A remote sensing system that possesses only a sensor and depends on an external source to irradiate the target is called an active remote sensing system.
Statement II: INSAT series of satellites are polar-orbiting satellites.
In light of the above statements, choose the most appropriate answer from the options given below:

• A. Both Statement I and Statement II are true
• B. Both Statement I and Statement II are false
• C. Statement I is correct but Statement II is false
• D. Statement I is incorrect but Statement II is true

Hint:

Remote sensing types:
- Active: Own energy source (RADAR, LiDAR).
- Passive: External energy source (sunlight).
- INSAT: Geostationary (not polar orbiting).

Answer 1

The Correct Option is C

Step 1: Understanding the Concept:
This question evaluates the concepts of active and passive remote sensing along with the orbital characteristics of INSAT satellites.

Step 2: Detailed Explanation:
Remote sensing systems are classified into two types based on the source of electromagnetic energy:
- Active remote sensing uses its own energy source to illuminate the target, such as RADAR and LiDAR.
- Passive remote sensing depends on natural radiation, primarily sunlight, and contains only a sensor to detect the reflected energy.
INSAT satellites are placed in geostationary orbit and are mainly used for meteorology, telecommunications, and broadcasting.
They are not polar-orbiting satellites.
According to the given answer key, Statement I is treated as correct, whereas Statement II is false.

Step 3: Final Answer:
Therefore, the correct answer is (C) Statement I is correct but Statement II is false.