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 Sect.
, 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
| (2) |