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Relation between brightness temperature TB and physical body temperatureTp is ____(a) TB=\((1-\mid\Gamma_s \mid^2) T_p\)(b) TB=\(T_p/(1-\mid\Gamma_s \mid^2)\)(c) TB=\((1-\mid\Gamma_s \mid)T_p\)(d) TB=\((1-\mid\Gamma_s \mid)^2 T_p\)I have been asked this question during an internship interview.Asked question is from Antenna Noise Temperature in portion Antenna Parameters – II of Antennas

Answer»

The CORRECT option is (a) TB=\((1-\mid\Gamma_s \mid^2) T_p\)

The explanation is: The relation between brightness temperature and the physical body temperature is GIVEN by TB=\((1-\mid\Gamma_s \mid^2) T_p\)

Here Γsis the reflection coefficient for a given POLARIZATION and emissivity =\(1-\mid\Gamma_s \mid^2.\)



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