12. Emissivity depends on following factors:-
If the emissivity of an object varies with wavelength, the object is said
to be a selective radiance.
A graybody has 𝜺<1 but is constant at all wavelength
A selectively radiating bodies has emissivity ranging 0 ≤ 1.
• Color
• Surface Roughness
• Moisture Contant
• Compaction
• Field of view
• Viewing angle
What is Emissivity:-
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13. Types of Thermal Sensors
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17. Applications of Thermal Remote Sensing:-
Tropical Cyclone Identification Forest Fire
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18. Advantages and Disadvantages of ‘TIRS’
Advantage
• We can detect true temperature
of an objects.
• Feature can’t be detected by
optical ‘RS’ may be detected
with thermal ‘IR’
Disadvantages
• It is pretty difficult to maintain
the sensors at required temp.
• Image Interpretation of thermal
is difficult.
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