Will the SuperPDC be expected to archive the data or just concentrate it and forward to the several destinations?
A SuperPDC should have the capability to do both if it is fast enough. The obvious problem of locally storing ALL the data would be the need to employ large disk drives and have a system in place to regularly transfer full disk phasor data to DVD for permanent storage. A rate of 30 or 60 samples per second fills up a disk drive very quickly.