Status Stakeholders Mark Lacy John Tobin Amy Kimball  Outcome Keep the calibration and flagging as is, but "fail entire request" for images with artifacts due to outlying antennas Due date When does this decision need to be made by? Owner Mark Lacy

Background

During A→D move, there will be cases where observations were taken when most antennas are in the new (or old) configuration, and the others are in the other configuration, leading to a skewed distribution of baselines. Images can have serious artifacts (typically seen in the form of bright fringes) due to the odd baseline lengths.

Note from John Tobin: if more than 3-5 antennas are outlying, the self-cal masking will likely fail. However, although it may be possible to "save" the image by flagging the outlying antennas, this is not ideal given that: (1) we don't know the observers' goals (they knew they were asking for move time so it's possible a nice image isn't what they're going for)  (2) this may require flagging a large fraction of the data, and  (3) it takes up Operations resources to spend time on this.