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Introduction

This note follows on from previous memos by Cornwell (1995a, 1995b) on the Hamaker, Bregman, and Sault (1995) calibration formalism. Here I specify the capabilities demanded of the calibration and imaging software and lay out a development plan to cover activities for the next 12-18 months. I have worked from memo 115 in the AIPS++ User Specifications Memo series, authored by Bob Hjellming. My method has been as follows:

1.: Copy those relevant sections from that memo,
2.: Remove items that are irrelevant or out-dated,
3.: Consolidate items into re-statements relevant to the generic instrument

I have tried hard to adhere to the original specifications, but have simplified where possible. As an example of simplification, I have tried to remove most statements that VLBI processing is special in some way. Similarly, I have assumed that mosaic processing will be standard.

Next I enumerate the priorities from NFRA (for WSRT), ATNF (for ATCA), and NRAO (for the VLA and VLBA). All of these fit within the larger set of specifications so the most important thing is the priority given to these items.

Finally, I give a development plan designed to cover work in the Synthesis area within AIPS++ over the next 12-18 months.

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