1 NIR and SWIR cameras typically detect scattered item radiation and need exterior irradiation supplied by the Sunshine. Many observed objects have temperatures down below one hundred°C (212°File). Their respective object radiation is too weak being detected by NIR and SWIR sensors, but MWIR and LWIR cameras commonly detect these https://erickwzywr.boyblogguide.com/27589243/fascination-about-infrared-thermal-imaging