The WAC nearside "no-slew" 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 under 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 available under "Supplementary Downloads".
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 (Speyerer, E.J. et al, 2014, Pre-flight and On-orbit 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, 2014, Resolved Hapke parameter maps of the Moon). 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° latitude by 90° longitude (90° latitude by 90° longitude for the 128 pixels/degree products). In addition, two polar stereographic projections are available for each pole from 60° to the pole.
Lower resolution products (at 64, 32, 16, 8, and 4 pixels/degree) are available in single equirectangular tiles, centered at 0° longitude (longitude range from -90° to 90°, latitude range from -90° to +90°). Additionally, orthographic products are available at all resolutions showing the hemisphere centered at the equator at 0° longitude, and the polar tiles described above are also available at all resolutions. Each file is named with the following pattern:
[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)
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).