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The radiometric equation (eq. 11) gives the thermal noise
as a function of observing bandwidth
, integration
time
, for an array with
antennas, where
is the
geometric surface of an antenna and
is the aperture
efficiency. It also depends on the correlator efficiency
and
the phase decorrelation factor
.
For a baseline, we have the following noise equation:

(10) 
The array point source sensitivity is given by:

(11) 
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