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Let's assume that
;
then:
Mload-Matm |
= |
![$\displaystyle \eta_f T_{gr} e^{-\tau}$](img771.gif) |
|
Msou-Matm |
= |
![$\displaystyle \Delta T_{A}^* e^{-\tau}$](img772.gif) |
|
![$\displaystyle \Delta T_{A}^*$](img773.gif) |
= |
![$\displaystyle \frac{M_{sou}-M_{atm}}{M_{load}-M_{atm}} \eta_{f} T_{gr}$](img774.gif) |
(8.31) |
Note that in Eq.8.31, the measurement of the antenna temperature includes
the atmospheric opacity correction, but does not depend explicitly on an assumption
on the atmospheric opacity. We can write:
![\begin{displaymath}\Delta T_A^*= \frac{M_{sou}-M_{atm}}{M_{load}-M_{atm}}{\bf T_{cal}}
\end{displaymath}](img775.gif) |
(8.32) |
where we define Tcal as
.
Next: 8.5.2 More realistic case
Up: 8.5 Correction for atmospheric TA*
Previous: 8.5 Correction for atmospheric TA*
S.Guilloteau
2000-01-19