IFOV describes what aspect of the image?

• A. The angle a single pixel sees
• B. The total field of view
• C. The camera's spectral range
• D. The resolution of the image

Answer: (A)

IFOV is the angle that a single pixel (detector) sees, the instantaneous field of view of one pixel. It determines the ground footprint of that pixel—the area of the scene it represents. A smaller IFOV means each pixel covers a smaller area on the ground, giving finer spatial detail; a larger IFOV covers a larger area, reducing spatial detail. The total field of view is the sensor’s overall viewing span, not the sight of one pixel. The spectral range is about which wavelengths the sensor detects. While IFOV influences spatial resolution (how much ground area each pixel covers), it’s specifically describing the per-pixel view, not the entire image size.