17.6 Concluding remarks

Mosaic observations are now routinely performed with the Plateau de Bure interferometer, at both $\lambda$ 3 mm and $\lambda$ 1.3 mm. It has proven to be a very efficient method to map extended sources, including using the most extended configuration of the array. The number of fields are usually $\leq 6$, but can be more important in some cases: as of the date of writing, the largest observed mosaic has 20 fields. Data processing requires a few more operations than normal observations, but does not present any specific difficulties. Reconstruction and deconvolution algorithms are available in the MAPPING software.