Here, is the number of frequency points per subband and is
the number of subbands.
A subband can be
thought of an IF in aips usage: different upper- or lower-sidebands
from each BBC count as subbands, but the number of polarizations does not
enter the picture.
is the subband bandwidth; for our station units and
correlator, the maximum is 16MHz (assuming at least Nyquist
is the total sampled bandwidth (
is the sky frequency (pick lower edge of lowest
SB for most conservative estimate), and
is the integration time.
Other parameters have mks units.
The parameters in eq.(1) that can be controlled during correlation
are , ,
and . The latter will be set in most cases by how you scheduled
your experiment (it is possible to correlate subsets of subbands in multiple
passes, with approval from the EVN Program Committee),
but the first two are entirely independent of the observations
and are limited by hardware/software characteristics of the correlator.