REQUIREMENTS

Requirements fall into three areas: (1) sensitivity - zero or minimal loss of sensitivity when doing polarization observations; (2) Fourier sampling - ability to obtain and include zero and short spacing polarization data in order to carry out full synthesis mapping; and (3) accuracy - the ability to calibrate instrumental polarization easily and accurately (0.1% or better) over the entire primary beam. We briefly describe these requirements in this section, and in section 4 discuss specifics of instrument design and calibration needed to meet these requirements.