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DiFX2.0 is planned to include (at some stage) the ability to produce a phased array output, rather than a normal cross-correlation output. This will rely on the model provided to the correlator being perfect for phasing, and so will require a two-pass approach: one pass in normal cross-correlation mode to identify the delay/phase adjustments to phase up, and one pass in phased-array mode where the signals are added rather than multiplied.
It is planned that the phased array output will be capable of providing two kinds of data product:
It is envisaged that the time series style output will be written in VDIF format, and the filterbank style output will be written like a normal DiFX output (see the fileformats page for more details on these).