Extra Wide Swath
Similar to the IW mode, the Extra Wide (EW) swath mode employs the TOPSAR technique to acquire data over a wider area than for IW mode using five sub-swaths. EW mode acquires data over a 400 km swath at 20 m by 40 m spatial resolution.
EW SLC products contain one image per sub-swath and one per polarisation channel, for a total of five (single polarisation) or 10 (dual polarisation) images in an EW product.
The EW mode is aimed primarily for use over sea-ice, polar zones and certain maritime areas, in particular for ice, oil spill monitoring and security services. Like IW, EW mode can also be used for interferometry since it shares the same characteristics for burst synchronisation, baseline and Doppler stability.
The table below shows the main characteristics of the Extra Wide swath mode.
Table 1: Characteristics of Extra Wide swath mode
The table below shows the incidence and off-nadir angles for Extra Wide swath mode beams.
Table 2: Angles for Extra Wide sub-swaths