Question

Indian remote sensing satellite - 1C (IRS-1C) operates in how many spectral bands?

• A. 2
• B. 3
• C. 4
• D. 5

Hint:

Modern multispectral satellites like those in the Landsat or Sentinel series often have numerous spectral bands. For exam purposes, knowing the key characteristics of major satellite series like IRS (e.g., LISS-III having 4 bands) is important.

Answer 1

The Correct Option is C

Step 1: Identify the sensors on the IRS-1C satellite.
IRS-1C, a significant satellite in the Indian Remote Sensing program, carried three main imaging sensors:
1. Panchromatic Camera (PAN)
2. Linear Imaging Self-Scanning Sensor (LISS-III)
3. Wide Field Sensor (WiFS)
Step 2: Determine the number of spectral bands for the primary multispectral sensor.
The question is likely referring to the primary operational multispectral sensor, which is LISS-III. The LISS-III sensor operates in four spectral bands:
- Band 2: Green (0.52 - 0.59 \(\mu\)m)
- Band 3: Red (0.62 - 0.68 \(\mu\)m)
- Band 4: Near-Infrared (NIR) (0.77 - 0.86 \(\mu\)m)
- Band 5: Short-Wave Infrared (SWIR) (1.55 - 1.70 \(\mu\)m)
The PAN sensor operates in a single, wide panchromatic band. The WiFS sensor operates in two bands (Red and NIR). Given the options, the question is best answered by considering the number of bands in the LISS-III sensor.