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/E041N1229

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_E041N1229
Site Name	King Crater Ejecta
Center Lat	4.0
Center Lon	122.0
Minimum Lat	3.23
Western-most Lon	122.72
Maximum Lat	4.47
Eastern-most Lon	122.83
DTM Used	NAC_DTM_KINGEJECTA_E041N1229
# Images	32

Images used:

Image ID	Avg Incidence	Avg Emission	Avg Phase	Pixel Scale	Date
M1113368103L	52°	2°	54°	1.17 m/px	2013-01-21
M1113368103R	52°	1°	51°	1.17 m/px	2013-01-21
M1122794110R	59°	1°	58°	1.22 m/px	2013-05-10
M1153417741L	58°	2°	60°	1.25 m/px	2014-04-29
M1153417741R	58°	1°	57°	1.25 m/px	2014-04-29
M1155773998L	85°	2°	87°	1.25 m/px	2014-05-26
M1156944941L	81°	2°	82°	1.14 m/px	2014-06-09
M1156944941R	81°	1°	80°	1.14 m/px	2014-06-09
M1189872676L	47°	63°	110°	2.33 m/px	2015-06-25
M1189872676R	48°	60°	107°	2.17 m/px	2015-06-25
M1189900794L	51°	18°	70°	1.07 m/px	2015-06-25
M1189900794R	51°	15°	67°	1.06 m/px	2015-06-25
M1189907824L	52°	2°	51°	1.02 m/px	2015-06-25
M1189907824R	52°	4°	48°	1.02 m/px	2015-06-25
M1189914853L	53°	21°	32°	1.09 m/px	2015-06-25
M1189914853R	53°	24°	30°	1.10 m/px	2015-06-25
M1189935943L	56°	56°	2°	1.91 m/px	2015-06-26
M1189935943R	57°	59°	3°	2.02 m/px	2015-06-26
M1192234117L	21°	57°	78°	1.77 m/px	2015-07-22
M1192234117R	22°	53°	75°	1.68 m/px	2015-07-22
M1192255206L	25°	18°	42°	0.97 m/px	2015-07-23
M1192255206R	25°	15°	39°	0.96 m/px	2015-07-23
M1192262236L	26°	2°	23°	0.92 m/px	2015-07-23
M1192262236R	26°	5°	21°	0.92 m/px	2015-07-23
M1192269266L	27°	21°	6°	1.00 m/px	2015-07-23
M1192269266R	27°	24°	4°	1.01 m/px	2015-07-23
M1192297386L	30°	62°	32°	2.26 m/px	2015-07-23
M1192297386R	31°	65°	35°	2.44 m/px	2015-07-23
M1222859998R	23°	1°	21°	0.95 m/px	2016-07-11
M1232270318R	89°	1°	88°	0.91 m/px	2016-10-28
M141458230R	13°	1°	12°	0.61 m/px	2010-10-11
M165041891R	74°	1°	73°	1.23 m/px	2011-07-11

King Crater Ejecta Photometry Site