Brightness temperature calculation

AI Thread Summary
The discussion highlights the lack of an exact general formula for calculating brightness temperature, noting that Wien's approximation is commonly used but considered too crude. It emphasizes that accurate brightness calculations require knowledge of the material's emissivity, which is an empirical parameter found in reference tables. Participants express the need for more precise methods beyond standard approximations. The conversation underscores the importance of understanding emissivity for accurate thermal measurements. Overall, the search for a more exact formula remains unresolved.
IMotelot
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Where to find an exact formula for brightness temperature caculation?
Only Wien's approximation is used everywhere. It is too crude for me.
 
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There is no exact "general" formula.
However, the brightness can be calculated if you know the emissivity of the material (an empirical parameter, which you need look it up in a table).
 

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