In anticipation of the DRAT Workshop in Tucson next week, I have asked Frank Hill for a prioritized list of systematic effects from the data reduction and Jack Harvey for a prioritized list of instrumental systematic effects. Here is the result for your consideration.
Tests are underway wherein both methods are used over a range of l values, and results compared.
One goal is to devise a smoother transition. Needs to be improved, perhaps by better first guess tables. We now know that steps in the modulus of the spherical harmonic coefficient time series are present at the transitions between sites. The magnitudes of the steps appear to be correlated with the image spatial scale, and are a function of m in the time series for a given l. There is evidence that the steps may produce an artifact in the l-nu diagram.