After the atmopheric calibration that converts the measurement scale from
the correlator output (in counts) to the
scale, the output of the
correlator for one correlation is a power equivalent temperature (in the
Rayleigh-Jeans domain), which is sampled at a rate of
, where
is the frequency bandwidth over which the power is measured. As explained
in the previous section, the standard deviation of each power measurement
is given by the system temperature power (
). During the integration
time (
),
independent samples of the signal power are
measured to ensure the Nyquist sampling of the signal in the bandwidth
. The signal power is averaged over these independent samples. The
uncertainty on the averaged signal power, named sensitivity (
), is
thus standard deviation of the average or