Barkhans Comparison of the details provided by Viking and MOC images. On the left, the nature of the landforms is difficult to assess. On the right, MOC makes it clear that a dune field is present in this area and provide great details about the dunes morphology. The Viking image covers a region 38 by 35.3 kilometers.
North is up, illumination in the Viking image is from the lower left.
The MOC image is the slightly darker strip just left of center. The MOC image was taken in early Northern Spring, July 1998. MOC image 45205 subframe shown at full resolution of approximately 4 meters per pixel. The effective resolution of this image is less than the per pixel scale because the atmosphere was cloudy and the MOC has not yet been focussed. Features as small as 10-12 meters across are probably visible in this image.