Multiple detection cell sizes.

For each SASS processing, the source detection algorithm (the classical `sliding box') is run for detect cell sizes of 12 $^{\prime\prime}$, 24 $^{\prime\prime}$, 48 $^{\prime\prime}$, 72 $^{\prime\prime}$, and 120 $^{\prime\prime}$.

For strong isolated sources merging of these multiple detections should present no problems, but it is often found that a single large cell corresponds to two or more 12 $^{\prime\prime}$ detections.