Overview

rms noise in a single channel for a single visibility is: [math]\displaystyle{ \sigma_{ij}=\frac{2k}{A_{eff}} }[/math] [math]\displaystyle{ \sqrt{\frac{T_{sys,i} T_{sys,j}}{\Delta\nu_{ch} t_{ij}}} }[/math]

Where k is Boltzmann's constant, A_eff is the effective antenna area, &Delta&nnu is the channel width, and t_{ij} is the integration time per visibility.