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 0.55 m/px to 0.64 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:

NAC_ROI_xxxxxxxxSSv_AyyyBzzzz[_##M].IMG where

  • NAC_ROI = indicating it's a NAC ROI product
  • xxxxxxx = words specifying the sitename (8 characters)
  • SS = LO for low Sun angle or HI for high Sun angle
  • v = incremental character for distinguishing multiple mosaics with similar lighting of the same region. Letters are used for individual mosaics and numbers are used for composite mosaics composed of mulitiple controlled mosaics.
  • A = projection type (E for equirectangular, P for polar stereographic)
  • yyy = center latitude to the nearest 10th of a degree
  • B = N for northern hemisphere, S for southern hemisphere
  • zzzz = center longitude to the nearest tenth of a degree. The longitude domain for all NAC DTMs is 360 positive east.
  • [_##M] = indicates the pixel scale in meters; used only for supplementary lower resolution products.

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.


Images used, in order of layering from front to back:
RDR Name NAC_ROI_HUMBOLT_LOA_E547N0772
Site Name Humboldtianum Basin
Center Lat 54.7
Center Lon 77.2
Pixel Scale 0.55 m/px
Image Start Time (UTC) 2009-08-04 05:32:35.003+00
Image Stop Time (UTC) 2010-11-11 10:16:53.962+00
# Images 27
Incidence Low Sun
Minimum Latitude 53.90
Maximum Latitude 55.50
Minimum Longitude 76.54
Maximum Longitude 77.84
Image ID Center Lat Center Lon Incidence Pixel Scale
M128788211L 54.55 77.61 66° 0.53 m/px
M128788211R 54.55 77.47 66° 0.53 m/px
M144109863L 54.90 76.79 67° 0.48 m/px
M144109863R 54.90 76.68 67° 0.48 m/px
M137033473L 54.64 76.91 64° 0.48 m/px
M137033473R 54.65 77.02 64° 0.48 m/px
M113438902L 54.46 77.33 70° 0.48 m/px
M113438902R 54.46 77.22 70° 0.48 m/px
M121716317L 54.35 76.80 60° 0.52 m/px
M121716317R 54.35 76.93 60° 0.52 m/px
M121709528L 54.37 77.63 60° 0.52 m/px
M121709528R 54.37 77.77 60° 0.52 m/px
M141749245L 53.87 76.94 57° 0.48 m/px
M141749245R 53.87 76.83 57° 0.48 m/px
M139387672L 54.82 77.56 57° 0.48 m/px
M139387672R 54.83 77.67 57° 0.48 m/px
M126433589L 55.04 77.37 56° 0.52 m/px
M126433589R 55.04 77.23 56° 0.52 m/px
M126426804R 55.09 78.26 56° 0.52 m/px
M119354856L 54.27 77.00 73° 0.52 m/px
M119354856R 54.28 77.14 73° 0.52 m/px
M134672200L 54.86 76.77 76° 0.48 m/px
M134672200R 54.87 76.88 76° 0.48 m/px
M104010378L 54.73 76.79 72° 1.71 m/px
M104010378R 54.74 77.27 72° 1.71 m/px
M104003221L 54.68 77.08 72° 1.71 m/px
M104003221R 54.69 77.56 72° 1.71 m/px


Link to browse PNG
NAC_ROI_HUMBOLT_LOA

Humboldtianum Basin low-Sun semi-controlled NAC mosaic (A)

Mosaic (0.55 m/px) (click for more information)


Supplemental Downloads