- #1
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.
Only Wien's approximation is used everywhere. It is too crude for me.
Brightness temperature calculation is a method used to estimate the temperature of an object by measuring the amount of electromagnetic radiation it emits at specific wavelengths. It is often used in remote sensing and astronomy to determine the temperature of celestial objects and the Earth's surface.
Brightness temperature is calculated using the Planck's Law, which relates the amount of radiation emitted by an object to its temperature. This law takes into account the object's emissivity, or its ability to emit radiation, and its spectral radiance, which is the amount of radiation emitted at different wavelengths.
The accuracy of brightness temperature calculation can be affected by several factors, including the object's emissivity, the spectral response of the measuring instrument, and the atmospheric conditions. Additionally, surface properties such as roughness and composition can also affect the accuracy of the calculation.
Brightness temperature calculation has a wide range of applications in various fields such as remote sensing, astronomy, and climate studies. It is used to measure the temperature of celestial objects such as stars and planets, as well as the Earth's surface temperature, which can provide valuable information about weather patterns and climate change.
Brightness temperature is a measure of the amount of radiation emitted by an object, while actual temperature is a measure of the average kinetic energy of the particles in the object. In some cases, the two temperatures may be the same, but in others, they may differ due to factors such as emissivity, atmospheric conditions, and surface properties.