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 of the same feature across different incidence, emission, and phase angles make up a photometric site. To extract accurate photometric information from a sequence, a control network is generated to tie each image to a NAC Digital Terrain Model (DTM) [1] derived orthophoto (ground truth), facilitating precise photometric angle calculations using the NAC DTM [2]. A bundle adjustment is performed to correct for pointing errors and image alignment. The images are then map-projected onto high resolution local area NAC DTMs [3].

Browse PNG images for each of the images in the photometric series can be found at http://lroc.sese.asu.edu/data/LRO-L-LROC-5-RDR-V1.0/LROLRC_2001/EXTRAS/BROWSE/NAC_PHO/E018N3346

This page allows you to preview images based on photometric conditions. Azimuth are given as degrees clockwise from north, and incidence angle is arbitrarily signed so that negative indicates sunlight is from the west. Selecting an image in the list will display it on the left and its photometric angles on the 3D display. Images names highlighted in dark gray are a set with similar incidence angles. The sliders in the lower left will also preview different images. The incidence and phase sliders will select from all images, while the emission slider selects within the currently highlighted set.

When citing this product, use the following reference:

Martin, A. C., Boyd, A. K., Robinson, M. S. & the LROC Team (2018). Controlling LROC NAC Photometric Images. In Lunar and Planetary Science Conference (Vol. 49, abstract #1621). https://www.hou.usra.edu/meetings/lpsc2018/pdf/1621.pdf

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.

References:

1. Klem, S. M., Henriksen, M. R., Stopar, J., Boyd, A., & Robinson, M. S. (2014). Controlled LROC Narrow Angle Camera High Resolution Mosaics. In Lunar and Planetary Science Conference (Vol. 45, abstract #2885). https://www.hou.usra.edu/meetings/lpsc2014/pdf/2885.pdf

2. Woodham, R. J. (1980). Photometric method for determining surface orientation from multiple images. Optical engineering, 19(1), 191139.doi:10.1117/12.7972479

3. Henriksen, M. R., Gojic, D., Gray, P. E., Wagner, R. V., Robinson, M. S., & the LROC Team (2015). Regional LROC NAC Controlled Mosaic and Absolute Accuracy Assessment. In Second Planetary Data Workshop (Vol. 2, abstract #7033). https://www.hou.usra.edu/meetings/planetdata2015/pdf/7033.pdf

RDR Name	NAC_PHO_E018N3346
Site Name	Mare Impact Melt
Center Lat	1.0
Center Lon	334.0
Minimum Lat	1.75
Western-most Lon	334.39
Maximum Lat	2.70
Eastern-most Lon	334.59
DTM Used	NAC_DTM_MAREMELT1_E018N3346
# Images	54

Images used:

Image ID	Avg Incidence	Avg Emission	Avg Phase	Pixel Scale	Date
M107042466L	24°	2°	26°	1.10 m/px	2009-09-08
M107042466R	24°	1°	23°	1.10 m/px	2009-09-08
M1134366516L	11°	9°	20°	0.90 m/px	2013-09-21
M1134366516R	12°	6°	18°	0.89 m/px	2013-09-21
M1134373624L	10°	27°	37°	0.99 m/px	2013-09-21
M1134373624R	11°	24°	34°	0.98 m/px	2013-09-21
M1136719372L	39°	2°	41°	1.01 m/px	2013-10-18
M1136719372R	39°	1°	38°	1.01 m/px	2013-10-18
M1142603254L	69°	18°	87°	1.13 m/px	2013-12-25
M1142603254R	70°	15°	85°	1.12 m/px	2013-12-25
M1142610364L	70°	0°	70°	1.08 m/px	2013-12-25
M1142610364R	71°	3°	68°	1.08 m/px	2013-12-25
M1144963909L	42°	5°	46°	1.09 m/px	2014-01-21
M1144963909R	42°	2°	43°	1.09 m/px	2014-01-21
M1147324778L	14°	10°	4°	1.11 m/px	2014-02-18
M1147324778R	14°	13°	2°	1.11 m/px	2014-02-18
M1147331891L	15°	26°	11°	1.21 m/px	2014-02-18
M1147331891R	15°	29°	13°	1.23 m/px	2014-02-18
M1154385830L	70°	2°	71°	1.13 m/px	2014-05-10
M1154385830R	70°	1°	69°	1.13 m/px	2014-05-10
M1162625862L	16°	2°	18°	0.99 m/px	2014-08-14
M1162625862R	16°	1°	15°	0.99 m/px	2014-08-14
M116479947L	86°	2°	88°	0.90 m/px	2009-12-26
M116479947R	86°	1°	85°	0.90 m/px	2009-12-26
M1164981036L	12°	2°	13°	1.00 m/px	2014-09-10
M1164981036R	12°	1°	11°	1.00 m/px	2014-09-10
M1167326897L	40°	23°	18°	1.06 m/px	2014-10-07
M1167326897R	40°	26°	15°	1.07 m/px	2014-10-07
M1167333999R	39°	1°	38°	0.98 m/px	2014-10-07
M1167341111L	38°	17°	55°	1.01 m/px	2014-10-07
M1167341111R	38°	14°	52°	1.00 m/px	2014-10-07
M1173221925L	70°	2°	72°	2.17 m/px	2014-12-14
M1177933558L	13°	3°	11°	1.10 m/px	2015-02-07
M1177933558R	13°	5°	8°	1.10 m/px	2015-02-07
M1180285892L	15°	2°	17°	1.10 m/px	2015-03-06
M1180285892R	16°	1°	14°	1.10 m/px	2015-03-06
M1184994621L	71°	2°	73°	1.10 m/px	2015-04-30
M1184994621R	71°	1°	70°	1.10 m/px	2015-04-30
M1193232179L	14°	2°	16°	0.86 m/px	2015-08-03
M1193232179R	14°	1°	13°	0.86 m/px	2015-08-03
M1197970413L	37°	63°	99°	1.94 m/px	2015-09-27
M1197970413R	37°	59°	96°	1.81 m/px	2015-09-27
M1223830657L	11°	2°	13°	0.77 m/px	2016-07-22
M1223830657R	11°	1°	10°	0.77 m/px	2016-07-22
M1228535838L	44°	2°	46°	0.76 m/px	2016-09-14
M1228535838R	44°	1°	43°	0.76 m/px	2016-09-14
M1236774850R	37°	1°	36°	1.07 m/px	2016-12-19
M1239123789L	8°	2°	10°	1.04 m/px	2017-01-15
M1254410289L	6°	2°	8°	0.80 m/px	2017-07-11
M1254410289R	6°	1°	5°	0.80 m/px	2017-07-11
M166012457L	63°	2°	65°	0.48 m/px	2011-07-22
M166012457R	63°	1°	62°	0.48 m/px	2011-07-22
M177799377L	73°	1°	72°	0.80 m/px	2011-12-06
M183696581R	36°	1°	35°	1.17 m/px	2012-02-12

Mare Impact Melt Photometry Site