Question

how does thermal cameras of satellite work?​

Answer 1

However, remote sensing of energy emitted from the Earth's surface in the thermal infrared (3 μm to 15 μm) is different than the sensing of reflected energy. Thermal sensors use photo detectors sensitive to the direct contact of photons on their surface, to detect emitted thermal radiation.

Answer 2

Explanation:

The thermography camera has a heat sensor called microbolometer. When it receives infrared radiation it warms and changes its electrical resistance. This change in resistance is measured and compared to a given temperature.

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