In order to avoid restoration artifacts, the beam spacing and offset angle are VERY critical parameters. With additional data taken at different times, and hence at different parallactic angles and therefore different scanning angles, the 2-D distributions of noise in the spatial frequency domain will in general be very different. Different data sets, with different beam spacings or beam scanning angles, should be combined in such a way as to optimize each individual spatial frequency. The complication here is that the data are all originally observed in the az-el frame, with a parallactic angle which is changing during the observation. Regridding into RA-Dec.
Input parameters are how extensive a region at the end of each row to use to derive the baseline.
All the previous stages of analysis have retained a weighting array, and an LST array, for each data set. This option does not exist today. It must be easy to examine all the intermediate stages of data analysis. Research is needed into the special characteristics of multi-beam data which can be exploited to optimize data. The raw data are written 10 times per second.