The generation of a multi-temporal mosaic of SLC-Off data is one means to reduce the impact of the SLC-Off anomaly, as the mosaic will have less missing data than a single scene. However, the reduction in missing data in a mosaic is variable and the benefits of mosaicking any two scenes are difficult to predict.
Geoscience Australia is further examining the methods and results of filling the gaps of 'no data' by mosaicking various SLC-Off scenes. No such products are available at this stage.
Below are examples of a two SLC-Off scenes mosaic and a three SLC-Off scenes mosaic.
(a) Two SLC-Off scenes mosaic acquired at July and
December 2003)
Select for higher resolution 111KB)
(b) Three SLC-Off scenes mosaic: (acquired at July, August
and December 2003)
Select for higher resolution 118Kb_image)
The image above left (a) shows the increased unaffected area (no scan gaps) by mosaicking multiple images. Yellow lines show the limit of unaffected area in the July image, Red lines show the limit of unaffected area in the July/December mosaic.
The image above right (b) shows the increased unaffected area (no scan gaps) by mosaicking multiple images. Magenta lines show the limit of unaffected area in the August image, Yellow lines the limit of unaffected area in the August/July mosaic and Cyan lines the limit of unaffected area in the August/July/December mosaic.