The two Narrow Angle Cameras (NACs) provide high-resolution (0.5 to 2.0 m/pixel) panchromatic images over a combined 5 km swath. Images acquired over many orbits and multiple months can be combined to create mosaics. NAC images acquired under similar lighting conditions (e.g. high sun/low sun) were map-projected using the GLD100 (WAC derived 100 m/pixel DTM) and LOLA derived crossover corrected ephemeris. In some cases images with similar incidence angles and opposite solar azimuth angles (east and west) were used to increase areal coverage. After map projection, the images were shifted in latitude and longitude to minimize offsets in regions of overlap, and the pixel values were scaled to reduce brightness contrasts caused by differences in illumination angles.
Due to the large size of this NAC ROI mosaic, the highest-resolution tiffs and pyramidal tiffs were down-sampled from 0.70 m/px to 0.74 m/px to fit the size constraints of the TIFF format.
When citing this product, use the following reference:
Robinson, M. S., Speyerer, E. J., Boyd, A., Waller, D., Wagner, R. V., & Burns, K. N. (2012). Exploring the Moon with the lunar reconnaissance orbiter camera. Int. Arch. Photogramm. Remote Sens. Spat. Inf. Sci, 39, B4. https://doi.org/10.5194/isprsarchives-XXXIX-B4-501-2012
For more information about this and other RDRs, see the RDR Software Interface Specification (SIS) at http://lroc.sese.asu.edu/data/LRO-L-LROC-5-RDR-V1.0/LROLRC_2001/DOCUMENT/RDRSIS.PDF.
PDS PRODUCT NAMING CONVENTION
The PRODUCT_ID naming convention for LROC NAC ROIs is:
Example: NAC_ROI_APOLLO15LOC_E252N0018.IMG is a NAC ROI of the Apollo 15 landing site with low-Sun. C indicates it's the third low-Sun mosaic of the Apollo 15 landing site produced. This mosaic is centered at latitude=25.2N, longitude=1.8E and is in equirectangular projection.
|Site Name||Apollo Basin|
|Pixel Scale||0.70 m/px|
|Image Start Time (UTC)||2016-04-27 16:19:45.678+00|
|Image Stop Time (UTC)||2016-04-27 20:15:00.129+00|
|Image ID||Center Lat||Center Lon||Incidence||Pixel Scale|
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Digital Terrain Model