The SRTM X-SAR Hillshade Mosaic is a greyscale shaded relief based on the SRTM X-SAR Elevation Mosaic. Combined with the latter, it can be used to add a 3d effect and enhance the visual resolution by pronouncing peaks and valleys.
Horizontal accuracy (absolute): ±20m 90% circular error
Horizontal accuracy (relative): ±15m 90% circular error
Vertical accuracy (absolute): ±16m 90% linear error
Vertical accuracy (relative): ±6m 90% linear error