Which IR sensor can penetrate cloud coverage?Group of answer choicesLWIRMWIRSWIRNIR

To determine which infrared (IR) sensor can penetrate cloud coverage, we need to consider the specific wavelength ranges associated with the different IR categories mentioned:

1. LWIR (Long-Wave Infrared): This range typically spans from 8 µm to 15 µm. LWIR can penetrate clouds and is often used in thermal imaging applications, as it is sensitive to heat emitted by objects.

2. MWIR (Mid-Wave Infrared): This range is from about 3 µm to 5 µm. MWIR can partially penetrate clouds depending on the thickness and water vapor content but is not as effective as LWIR.

3. SWIR (Short-Wave Infrared): This range extends from approximately 1 µm to 3 µm. While SWIR can provide useful images in some conditions, it is generally absorbed by water vapor and does not penetrate clouds well.

4. NIR (Near-Infrared): Ranging from 0.7 µm to 1 µm, NIR capabilities are limited in cloud penetration as they are similarly affected by atmospheric conditions.

Conclusion:

LWIR sensors are the best choice for penetrating cloud coverage due to their longer wavelengths which can effectively transmit through clouds and other atmospheric conditions.