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 0.88 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_PLATOEJCLOA_E534N3547
Site Name	Plato Ejecta
Center Lat	53.4
Center Lon	354.7
Pixel Scale	0.55 m/px
Image Start Time (UTC)	2009-08-10 12:38:40.339+00
Image Stop Time (UTC)	2010-11-17 18:58:00.717+00
# Images	44
Incidence	Low Sun
Minimum Latitude	52.68
Maximum Latitude	54.03
Minimum Longitude	353.35
Maximum Longitude	356.11

Image ID	Center Lat	Center Lon	Incidence	Pixel Scale
M119884226L	53.56	354.69	69°	0.48 m/px
M119884226R	53.57	354.79	69°	0.48 m/px
M119891006R	53.17	353.79	68°	0.48 m/px
M119877431L	53.16	355.69	68°	0.48 m/px
M119877431R	53.17	355.80	68°	0.48 m/px
M129324188L	53.55	354.64	69°	0.48 m/px
M129324188R	53.55	354.53	69°	0.48 m/px
M144659530L	53.51	354.51	68°	0.51 m/px
M144659530R	53.51	354.38	68°	0.51 m/px
M129317402L	53.52	355.65	69°	0.48 m/px
M129317402R	53.52	355.54	69°	0.48 m/px
M113988520L	52.62	355.48	71°	0.51 m/px
M113988520R	52.62	355.36	71°	0.51 m/px
M113995294L	53.24	354.78	71°	0.52 m/px
M113995294R	53.24	354.65	71°	0.51 m/px
M135228634L	53.54	353.96	73°	0.51 m/px
M135228634R	53.54	354.09	73°	0.51 m/px
M135221849L	53.53	355.02	73°	0.51 m/px
M135221849R	53.53	355.15	73°	0.51 m/px
M137576315L	53.53	355.67	61°	0.51 m/px
M137576315R	53.53	355.80	61°	0.51 m/px
M137583106L	53.21	354.61	61°	0.51 m/px
M137583106R	53.21	354.73	61°	0.51 m/px
M111632409L	53.28	354.99	60°	0.52 m/px
M111632409R	53.28	354.86	60°	0.51 m/px
M126955925L	54.07	355.90	58°	0.48 m/px
M126955925R	54.07	355.79	58°	0.48 m/px
M122245702L	53.18	354.41	56°	0.48 m/px
M122245702R	53.19	354.52	56°	0.48 m/px
M139944133L	53.49	354.21	55°	0.51 m/px
M139944133R	53.49	354.33	55°	0.51 m/px
M139937352L	53.19	355.27	55°	0.51 m/px
M139937352R	53.19	355.39	55°	0.51 m/px
M117529410L	53.17	353.96	85°	0.48 m/px
M117529410R	53.17	354.07	85°	0.48 m/px
M131685411L	53.37	354.41	85°	0.84 m/px
M131685411R	53.37	354.31	85°	0.84 m/px
M104561502L	52.88	353.60	69°	1.74 m/px
M104561502R	52.88	354.06	69°	1.73 m/px
M104554343L	52.96	354.72	69°	1.74 m/px
M104554343R	52.97	355.18	69°	1.74 m/px
M104547187L	52.94	355.84	69°	1.73 m/px
M132860606L	52.58	355.41	87°	0.51 m/px
M132860606R	52.58	355.53	87°	0.51 m/px

Link to browse PNG
NAC_ROI_PLATOEJCLOA

Plato Ejecta low-Sun semi-controlled NAC mosaic (A)