Modelling visibilities
hyperdrive uses a sky model when modelling/simulating visibilities. This means
that for every sky-model source, a visibility needs to be generated for each
observation time, baseline and frequency. Modelling visibilities for a source
can be broken down into three broad steps:
- Estimating a source's flux density at a particular frequency;
- Getting the baseline's beam response toward the source; and
- Applying these factors to the result of the measurement equation.
Beam responses are given by
mwa_hyperbeam. See more info
on the beam here.
The following pages go into further detail of how visibilities are modelled in
hyperdrive.