Empirically Normalized 7-Color Reflectance of the Moon This empirically normalized Wide Angle Camera (WAC) color mosaic covers an area from 60 degrees S to 60 degrees N and 0 degrees E to 360 degrees E and is composed of seven wavelength bands (321 nm, 360 nm, 415 nm, 566 nm, 604 nm, 643 nm, and 689 nm). The 7-band mosaic was constructed from 137,400 color WAC images acquired from January 21, 2010 to January 31, 2013 over a broad range of lighting and viewing geometries. Each pixel from the WAC observations was photometrically normalized to a standard geometry of 30 degrees incidence angle, 0 degrees emission angle, and 30 degrees phase angle using an empirically derived photometric function similar to that of Boyd et al. (2012), and local topography provided by the GLD100 WAC-derived 100m/pixel Digital Terrain Model (http://wms.lroc.asu.edu/lroc/view_rdr/WAC_GLD100; Scholten et al., 2012). The medians of normalized reflectance values (average n=142) for each 1600 m^2 area were computed and stored in an equal area projection. The final archive products were created by transforming this to a simple cylindrical projection in eight regional tiles that encompass 60 degrees latitude by 90 degrees longitude at 64 pixels/degree (~475 meters/pixel) and 304 pixels/degree (~100 meters/pixel). Spatial accuracy of each WAC image was ensured using ephemeris provided by the LOLA and GRAIL teams (Mazarico et al., 2012) and an improved geometric camera model (Speyerer et al., 2014). The semi-global 7-band mosaic at 64 pixels/degree is archived by each band with tiles of 60° latitude by 90° longitude tiles in equirectangular projection. A 3-band 8-bit/band RGB (R=689 nm, G=415 nm, B=321 nm) mosaic is also archived using the same tiling scheme. All tiled product files are named in following manner: WAC_EMP_[wavelength, e.g., 321NM|3BAND]_[projection, E for equirectangular][center latitude x10][N/S][center longitude x10]_[Pixels per Degree] Product Name Latitude Range Longitude Range Pixels/Degree WAC_EMP_*****_E300N0450_064P 0 to 60 0 to 90 64 WAC_EMP_*****_E300S0450_064P -60 to 0 0 to 90 64 WAC_EMP_*****_E300N1350_064P 0 to 60 90 to 180 64 WAC_EMP_*****_E300S1350_064P -60 to 0 90 to 180 64 WAC_EMP_*****_E300N2250_064P 0 to 60 180 to 270 64 WAC_EMP_*****_E300S2250_064P -60 to 0 180 to 270 64 WAC_EMP_*****_E300N3150_064P 0 to 60 270 to 360 64 WAC_EMP_*****_E300S3150_064P -60 to 0 270 to 360 64 The 643 band is also archived at a scale of 304 pixels/degree with tiles of 60° latitude by 90° longitude in equirectangular projection, as well as tiles in polar stereographic projection with data from 60° to 90°. These tiled products are named in the following manner: WAC_EMP_[wavelength, e.g., 643NM_[projection, E for equirectangular|P for Polar Stereographic][center latitude x10][N/S][center longitude x10]_[Pixels per Degree] Product Name Latitude Range Longitude Range Pixels/Degree Projection WAC_EMP_643NM_E300N0450_304P 0 to 60 0 to 90 304 Equirectangular WAC_EMP_643NM_E300S0450_304P -60 to 0 0 to 90 304 Equirectangular WAC_EMP_643NM_E300N1350_304P 0 to 60 90 to 180 304 Equirectangular WAC_EMP_643NM_E300S1350_304P -60 to 0 90 to 180 304 Equirectangular WAC_EMP_643NM_E300N2250_304P 0 to 60 180 to 270 304 Equirectangular WAC_EMP_643NM_E300S2250_304P -60 to 0 180 to 270 304 Equirectangular WAC_EMP_643NM_E300N3150_304P 0 to 60 270 to 360 304 Equirectangular WAC_EMP_643NM_E300S3150_304P -60 to 0 270 to 360 304 Equirectangular WAC_EMP_643NM_P900S0000_304P -90 to -60 0 to 360 304 Polar Stereographic WAC_EMP_643NM_P900N0000_304P 60 to 90 0 to 360 304 Polar Stereographic When citing this product, use the following reference: Boyd, A. K., Robinson, M. S., & Sato, H. (2012). Lunar Reconnaissance Orbiter wide angle camera photometry: An empirical solution. In Lunar and Planetary Science Conference (Vol. 43, abstract #2795). http://www.lpi.usra.edu/meetings/lpsc2012/pdf/2795.pdf References: Boyd, A.K., Robinson, M.S., and Sato, H. (2012), Lunar Reconnaissance Orbiter Wide Angle Camera Photometry: An Empirical Solution, In 43rd Lunar and Planetary Science Conference, Abstract #2795. http://www.lpi.usra.edu/meetings/lpsc2012/pdf/2795.pdf Mazarico, E., Rowlands, D.D., Neumann, G.A., Smith, D.E., Torrence, M.H., Lemoine, F.G., Zuber, M.T., (2012), Orbit determination of the Lunar Reconnaissance Orbiter, Journal of Geodesy , Volume 86, Issue 3, pp.193-207, https://doi.org/10.1007/s00190-011-0509-4 Scholten, F., J. Oberst, K.-D. Matz, T. Roatsch, M. Wählisch, E.J. Speyerer, M.S. Robinson (2012), GLD100: the near-global lunar 100 meter raster DTM from LROC WAC stereo image data, Journal of Geophysical Research, 117, https://doi.org/10.1029/2011JE003926 Speyerer, E.J., R.V. Wagner, M.S. Robinson, A. Licht, P.C. Thomas, K. Becker, J. Anderson, S.M. Brylow, D.C. Humm, M. Tschimmel (2014), Pre-flight and On-orbit Geometric Calibration of the Lunar Reconnaissance Orbiter Camera, Space Science Reviews, https://doi.org/10.1007/s11214-014-0073-3