This one-month WAC global mosaic was created by mosaicking 3117 nadir-pointing WAC images acquired during orbits 10921 through 11350 (3 November 2011 through 7 December 2011) into a single global image with seamless lighting. The orbit tracks progress across the Moon from 360 degrees E to 0 degrees E over the course of the month of imaging, with beta angles (the angle between the orbital plane and a vector to the Sun) going from 39.3 degrees to 74.0 degrees. Some gores may be present due to spacecraft slews for observations by other instruments. This mosaic uses the 643 nm band of the WAC. It uses a simple cylindrical map projection from 0 to 360 degrees longitude and -90 to 90 degrees latitude. Each image was projected onto the GLD100 (WAC derived 100m/pixel DTM), with accurate positioning of each WAC image ensured using ephemeris provided by the LOLA and GRAIL team and an improved camera geometry model [1]. All images were corrected to a common photometric geometry using a Hapke model [2]. To minimize lighting discontinuities near the poles, the images were mosaicked on a per- pixel basis based on incidence angle (angle between the Sun and the zenith): for each pixel in the output, the data was selected from the image with the lowest incidence angle at that location. A note on timing: To get complete coverage at the poles, the source image list extends slightly beyond the nominal ~28 days for the orbit track to cover the entire Moon. At the equator, the first and last images with visible data will be about 40 orbits (~3 days) after or before the listed start and end times, respectively (roughly orbits 10961-11310). ## Image Selection Details ## Color and monochrome WAC images with: - data_quality_id < 16, - exposure time <= 0.1 seconds - incidence angle < 95 degrees (or image center within 5 degrees of a pole) - off-nadir slew angle < 5 degrees - and orbit between 10921 and 11350, inclusive. A complete image list can be downloaded separately. ## Naming Scheme and Additional Files ## The naming scheme for this product is WAC_ORBITS_XXXXX_YYYYY, where XXXXX is the first orbit number from which images were used, and YYYYY is the last orbit. A low-resolution 8-bit browse product in PNG format for this product is available at: http://pds.lroc.asu.edu/data/LRO-L-LROC-5-RDR-V1.0/LROLRC_2001/EXTRAS/BROWSE/WAC_ORBITS/10921_11350/WAC_ORBITS_10921_11350.BROWSE.PNG A full-resolution GeoTIFF version of this product is available at: http://pds.lroc.asu.edu/data/LRO-L-LROC-5-RDR-V1.0/LROLRC_2001/EXTRAS/BROWSE/WAC_ORBITS/10921_11350/WAC_ORBITS_10921_11350.TIF ## References ## For more information on LROC Reduced Data Records (RDRs), please refer to the Software Interface Specification (SIS): http://pds.lroc.asu.edu/data/LRO-L-LROC-5-RDR-V1.0/LROLRC_2001/DOCUMENT/RDRSIS.PDF [1] Speyerer et al. 2014, Pre-flight and On-orbit Geometric Calibration of the Lunar Reconnaissance Orbiter Camera. http://link.springer.com/article/10.1007%2Fs11214-014-0073-3 [2] Sato et al. 2014, Resolved Hapke parameter maps of the Moon. http://onlinelibrary.wiley.com/doi/10.1002/2013JE004580/abstract