The WAC global mosaic is comprised of over 15,000 images acquired between November 2009 and February 2011. The WAC maps the whole Moon in one month, however the solar incidence angle at the equator changes about 28° from the beginning to the end of the month. To even out the incidence angle variations, the mosaic is comprised of data collected over three periods (1/20/2010 to 1/28/2010, 5/30/2010 to 6/6/2010, 7/24/2010 to 7/31/2010) (Table 1). Some gores were filled with data taken at other times. The non-polar images were map projected onto the GLD100 (WAC derived 100m/pixel DTM) while polar images were map projected on the LOLA shape model (80° to 90° N/S) and the GLD100 (60° to 80° N/S). Accurate positioning of each WAC image was ensured using ephemeris provided by the LOLA and GRAIL team and an improved camera geometry model (Speyerer, E.J. et al, 2012, In-flight geometric calibration of the Lunar Reconnaissance Orbiter Camera). To reduce brightness discrepancies across image boundaries, all images were corrected to a common photometric geometry using a Hapke model (Sato, H. et al, 2013, Precision of "tile-by-tile" photometric solutions from LROC WAC images). This mosaic uses only the 643 nm band of the WAC.
The WAC global mosaic is archived in ten regional tiles at three different resolutions: 100 meters/pixel, 256 pixels/degree, and 128 pixels/degree. Eight of the tiles are equirectangular projections that encompass 60° latitude by 90° longitude. In addition, polar stereographic projections are available for each pole from 60° to the pole.
|Product Name||Latitude Range||Longitude Range||Date Range||Beta Angle Range||Azimuth Range|
|WAC_GLOBAL_E300N0450||0° to 60°||0° to 90°||7/24/10 to 7/31/10||60-66||West|
|WAC_GLOBAL_E300S0450||-60° to 0°||0° to 90°||7/24/10 to 7/31/10||60-66||West|
|WAC_GLOBAL_E300N1350||0° to 60°||90° to 180°||1/20/10 to 1/28/10||61-69||West|
|WAC_GLOBAL_E300S1350||-60° to 0°||90° to 180°||1/20/10 to 1/28/10||61-69||West|
|WAC_GLOBAL_E300N2250||0° to 60°||180° to 270°||5/30/10 to 6/6/10||61-69||East|
|WAC_GLOBAL_E300S2250||-60° to 0°||180° to 270°||5/30/10 to 6/6/10||61-68||East|
|WAC_GLOBAL_E300N3150||0° to 60°||270° to 360°||7/30/10 to 8/7/10||55-61||West|
|WAC_GLOBAL_E300S3150||-60° to 0°||270° to 360°||7/30/10 to 8/7/10||53-61||West|
|WAC_GLOBAL_P900N0000||60° to 90°||0° to 360°||All above date ranges||53-69||-|
|WAC_GLOBAL_P900S0000||-90° to -60°||0° to 360°||All above date ranges||53-69||-|