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 1.04 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_MAREFRIGLOA_E598N0261
Site Name Mare Frigoris
Center Lat 59.8
Center Lon 26.1
Pixel Scale 0.55 m/px
Image Start Time (UTC) 2009-09-04 11:48:50.51+00
Image Stop Time (UTC) 2010-11-15 12:16:22.557+00
# Images 52
Incidence Low Sun
Minimum Latitude 58.58
Maximum Latitude 60.93
Minimum Longitude 24.78
Maximum Longitude 27.45
Image ID Center Lat Center Lon Incidence Pixel Scale
M111428632L 59.70 26.25 64° 0.49 m/px
M111428632R 59.70 26.12 64° 0.49 m/px
M137372660L 59.62 27.11 67° 0.48 m/px
M137372660R 59.62 27.23 67° 0.47 m/px
M137386223L 59.95 25.13 67° 0.48 m/px
M137386223R 59.95 25.25 67° 0.48 m/px
M137379439L 59.94 26.12 67° 0.48 m/px
M137379439R 59.94 26.24 67° 0.48 m/px
M142095090L 59.66 26.72 63° 0.48 m/px
M142095090R 59.66 26.59 63° 0.48 m/px
M122035430L 59.63 26.35 62° 0.52 m/px
M122035430R 59.63 26.51 62° 0.52 m/px
M142101884L 59.05 25.40 62° 0.48 m/px
M142101884R 59.05 25.28 62° 0.48 m/px
M126759317L 59.95 25.36 62° 0.52 m/px
M126759317R 59.95 25.20 62° 0.51 m/px
M126752534L 59.97 26.44 62° 0.52 m/px
M126752534R 59.96 26.28 62° 0.52 m/px
M126745751R 59.96 27.36 62° 0.52 m/px
M139747240R 59.94 24.86 62° 0.48 m/px
M139733671L 59.87 26.57 62° 0.48 m/px
M139733671R 59.87 26.69 62° 0.47 m/px
M109072406L 59.68 26.25 61° 0.50 m/px
M109072406R 59.68 26.11 61° 0.50 m/px
M144449071L 59.93 26.96 71° 0.47 m/px
M144449071R 59.93 26.84 71° 0.47 m/px
M144462632L 60.46 24.99 71° 0.48 m/px
M144462632R 60.46 24.86 71° 0.48 m/px
M129107210L 59.96 27.24 72° 0.52 m/px
M129107210R 59.96 27.09 72° 0.52 m/px
M129113988L 59.66 25.73 72° 0.52 m/px
M129113988R 59.66 25.58 72° 0.52 m/px
M119680743L 59.58 25.08 73° 0.52 m/px
M119680743R 59.59 25.23 73° 0.52 m/px
M119673956L 59.58 26.15 73° 0.52 m/px
M119673956R 59.59 26.31 73° 0.52 m/px
M113784865L 59.19 27.13 73° 0.48 m/px
M113784865R 59.19 27.01 73° 0.48 m/px
M113791634L 59.87 26.08 73° 0.48 m/px
M113791634R 59.87 25.95 73° 0.48 m/px
M135024966L 59.96 25.53 77° 0.48 m/px
M135024966R 59.96 25.66 77° 0.48 m/px
M135018181L 59.95 26.53 77° 0.48 m/px
M135018181R 59.95 26.65 77° 0.47 m/px
M131475259L 59.98 25.92 84° 0.52 m/px
M131475259R 59.98 25.77 84° 0.51 m/px
M106711367L 58.32 26.09 64° 3.59 m/px
M106711367R 58.32 26.64 64° 3.58 m/px
M106718538L 58.31 25.02 64° 3.59 m/px
M106718538R 58.31 25.58 64° 3.59 m/px
M106725709R 58.29 24.51 64° 3.59 m/px
M106704195L 58.33 27.15 64° 3.58 m/px


Link to browse PNG
NAC_ROI_MAREFRIGLOA

Mare Frigoris low-Sun semi-controlled NAC mosaic (A)

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


Supplemental Downloads