The WAC nearside "no-slew" low-sun (large incidence angle) monochrome (643 nm)
mosaic is comprised of 2257 images acquired between December 2010 and December
2011. The majority of the images used are from a three-week campaign in December
2010, during which the spacecraft did not slew, in order to build up a nearly
seamless map of the lunar nearside with consistent lighting. The remaining
images were selected to match the lighting as closely as possible, and were used
to fill small gores. The imaging periods used (from the top-most layer in the
mosaic to the bottom-most) were 2010-12-07 to 2010-12-27, 2011-12-07 to
2011-12-12, and 2011-06-02 to 2011-06-17. A complete image list ordered from
top-most to bottom-most is archived at WAC_ROI_NEARSIDE_DAWN_IMAGELIST.TXT.

All images were map projected onto the GLD100 (WAC derived 100m/pixel DTM) with
ephemeris provided by the LOLA and GRAIL team and an improved camera geometry
model [1]. To reduce brightness discrepancies across image boundaries, all
images were corrected to a common photometric geometry using a Hapke model [2].
This mosaic uses only the 643 nm band of the WAC.

The WAC nearside mosaic is archived in six regional tiles at three different
resolutions: 100 meters/pixel, 128 pixels/degree and 256 pixels/degree. Four of
the tiles are equirectangular projections that encompass 60 degrees latitude by
90 degrees longitude (90 degrees latitude by 90 degrees longitude for the 128
pixels/degree products). In addition, two polar stereographic projections are
available for each pole from 60 degrees to the pole.

Lower resolution products (at 64, 32, 16, 8, and 4 pixels/degree) are available
in single equirectangular tiles, centered at 0 degrees longitude (longitude
range from -90 to 90 degrees, latitude range from -90 to +90 degrees).
Additionally, orthographic products are available at all resolutions showing the
hemisphere centered at the equator at 0 degrees longitude, and the polar tiles
described above are also available at all resolutions. Each file is named with
the following pattern:
 WAC_ROI_NEARSIDE_DAWN_[E|P]###[N|S]????_***[M|P]
where:
 [E|P] indicates the map projection (E=Equirectangular or P=Polar Stereographic)
 ###[N|S] indicates the center latitude in 1/10th degrees North (N) or South (S)
 ???? indicates the center longitude in 1/10th degrees East
 ***[M|P] indicates the scale in meters/pixel (M) or pixels/degree (P)

Low-resolution 8-bit browse products in PNG format for this product, along with 
full-resolution 8-bit GeoTIFFs, are available at the following location, with 
names matching those of the full-resolution IMG files:
http://pds.lroc.asu.edu/data/LRO-L-LROC-5-RDR-V1.0/LROLRC_2001/EXTRAS/BROWSE/WAC_ROI/WAC_ROI_NEARSIDE_DAWN/

When citing this product, use the following reference:
Wagner, R. V., Speyerer, E. J., Robinson, M. S., & LROC Team. (2015).
    New Mosaicked Data Products from the LROC Team. In Lunar and Planetary
    Science Conference (Vol. 46, abstract #1473).
    https://www.hou.usra.edu/meetings/lpsc2015/pdf/1473.pdf

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, E. J., Wagner, R. V., Robinson, M. S., Licht, A., Thomas, P. C.,
    Becker, K., Anderson, J., Brylow, S.M., & Tschimmel, M. (2016). Pre-flight
    and on-orbit geometric calibration of the Lunar Reconnaissance Orbiter
    Camera. Space Science Reviews, 200(1-4), 357-392.
    https://doi.org/10.1007/s11214-014-0073-3

[2] Sato, H., Robinson, M. S., Hapke, B., Denevi, B. W., & Boyd, A. K. (2014).
    Resolved Hapke parameter maps of the Moon. Journal of Geophysical Research:
    Planets, 119(8), 1775-1805.
    https://doi.org/10.1002/2013JE004580