Figure 39.  Simulated TOPSAR coverages for A) Rabbit Ears ISA, B) North Park ISA, and C) Fraser ISA. Flight lines were simulated using the USGS 30-m DEM data as a base map. Color represents the DEM data and the shading represents the simulated radar image with near range appearing brighter than far range. In areas where the far range of the two flight lines is adjacent, it may appear that there is a gap, but there is really 3.5 km of overlap.