Level-1 Interferometric Wide Swath SLC Products
The IW SLC product contains one image per sub-swath, per polarisation channel, for a total of three or six images. Each sub-swath image consists of a series of bursts, where each burst was processed as a separate SLC image. The individually focused complex burst images are included, in azimuth-time order, into a single sub-swath image, with black-fill demarcation in between
Unlike SM and WV SLC products, which are sampled at the natural pixel spacing, the images for all bursts in all sub-swaths of an IW SLC product are re-sampled to a common pixel spacing grid in range and azimuth. The resampling to a common grid eliminates the need of further interpolation in case, in later processing stages, the bursts are merged to create a contiguous ground range, detected image.
The following properties are particular to each sub-swath of the IW mode.