The two Narrow Angle Cameras (NACs) provide high-resolution (0.5 to 2.0 m/pixel) panchromatic images over a combined 5 km swath. NAC images acquired on consecutive orbits, or occasionally over non-consectutive orbits under very similar lighting conditions (e.g. less than 5° difference in incidence angle and the same sun direction), can be combined to create controlled mosaics. A control network is generated to tie the images to the most accurate ground truth available and a bundle adjustment is performed to correct for pointing errors and image alignment. The images are then map-projected using the GLD100 (WAC derived 100 m/pixel DTM) and LOLA derived crossover corrected ephemeris and mosaicked together into an almost seamless mosaic of the region.

RDR Name NAC_ROI_ALPHNSUSLOA_E129S3581
Site Name Alphonsus eastern vents
Center Lat -12.9
Center Lon 358.1
Pixel Scale 0.90 m/px
# Images 4
Incidence Low Sun

Images used, in order of layering from front to back:
Image ID Center Lat Center Lon Incidence Pixel Scale
M192967513R -12.94 357.90 72° 0.93 m/px
M192960364L -12.94 358.36 73° 0.95 m/px
M192960364R -12.94 358.20 73° 0.96 m/px
M192967513L -12.94 358.05 72° 0.93 m/px

Alphonsus eastern vents low-Sun controlled NAC mosaic (A)

Mosaic (0.90 m/px) (click for more information)


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