PROJECT NAME ESALL_MP1 Funding of DTM generation by the ESA Lunar Lander project for the characterization of potential landing sites LROC NAC SOURCE IMAGES M139912793 L/R M139919591 L/R M139926365 L/R M139933163 L/R M141086909 L/R M141093708 L/R M141100482 L/R M141107281 L/R TECHNICAL CONTACT INFORMATION NAME German Aerospace Center (DLR) INSTITUTION Institute of Planetary Research, Frank.Scholten@dlr.de DATE CREATED October 4, 2012 - ESA Lunar Lander products from DLR are tied to a set of LOLA elevations with RMS error of 0.5m (for MP1: ~100 LOLA orbit tracks), individual LOLA track correction (see Glaeser et al.,2013, 44th LPSC, #1967). LOLA elevations are based upon radio and cross-over corrected LRO orbits. The RMS error of is the root-mean-square of the elevation difference between the LOLA points and the DTM. This value is a combination of error from the LOLA points and the DTM, and may give a measure of the horizontal and vertical accuracy of the DTM. - The VICAR-based stereo-photogrammetric processing system at DLR was used to derive the DTM. - Image resolution is 1 m/pixel. Post spacing in DTM is 2.0 m. - DTM start time: 2010-09-23 20:25:26 and DTM stop time: 2010-10-07 16:14:12. - DTM extents: Min. Lat.: -86.05977243 Min. Lon.: 356.38919068 Max. Lat.: -85.88846091 Max. Lon.: 358.83078557 SPECIAL PROCESSING NOTES - Please note that the orthophotos, including the orthomosaic, have horizontal offsets relative to the DTM and to each other. These offsets vary over different areas of the images, and represent misalignments of up to 15m or greater. - The supplemental GeoTIFF products were generated from the NAC DTM by the LROC team at Arizona State University. KEY FEATURES - Polar Region REFERENCE For more information on the methodology and preliminary error analysis of the DTMs, see: Oberst, J., Scholten, F., Matz, K.-D., Roatsch, T., Wählisch, M., Haase, I., Gläser, I., Gwinner, K., Robinson, M.S., and the LROC Team, 2010. Apollo 17 Landing Site Topography from LROC NAC Stereo Data- First Analysis and Results. 41st Lunar and Planetary Science Conference, Houston, TX, March 2010, Abs #2051. http://www.lpi.usra.edu/meetings/lpsc2010/pdf/2051.pdf RDR SIS: http://lroc.sese.asu.edu/data/LRO-L-LROC-5-RDR-V1.0/LROLRC_2001/DOCUMENT/RDRSIS.PDF LINKS TO BROWSE IMAGES http://lroc.sese.asu.edu/data/LRO-L-LROC-5-RDR-V1.0/LROLRC_2001/EXTRAS/BROWSE/NAC_DTM/ESALL_MP1/NAC_DTM_ESALL_MP1_CLRDISC_LEGEND.BROWSE.PNG http://lroc.sese.asu.edu/data/LRO-L-LROC-5-RDR-V1.0/LROLRC_2001/EXTRAS/BROWSE/NAC_DTM/ESALL_MP1/NAC_DTM_ESALL_MP1_CLRDISC.BROWSE.PNG http://lroc.sese.asu.edu/data/LRO-L-LROC-5-RDR-V1.0/LROLRC_2001/EXTRAS/BROWSE/NAC_DTM/ESALL_MP1/NAC_DTM_ESALL_MP1_CLRGRAD_LEGEND.BROWSE.PNG http://lroc.sese.asu.edu/data/LRO-L-LROC-5-RDR-V1.0/LROLRC_2001/EXTRAS/BROWSE/NAC_DTM/ESALL_MP1/NAC_DTM_ESALL_MP1_CLRGRAD.BROWSE.PNG http://lroc.sese.asu.edu/data/LRO-L-LROC-5-RDR-V1.0/LROLRC_2001/EXTRAS/BROWSE/NAC_DTM/ESALL_MP1/NAC_DTM_ESALL_MP1_CONF.BROWSE.PNG http://lroc.sese.asu.edu/data/LRO-L-LROC-5-RDR-V1.0/LROLRC_2001/EXTRAS/BROWSE/NAC_DTM/ESALL_MP1/NAC_DTM_ESALL_MP1_P897S2037.BROWSE.PNG http://lroc.sese.asu.edu/data/LRO-L-LROC-5-RDR-V1.0/LROLRC_2001/EXTRAS/BROWSE/NAC_DTM/ESALL_MP1/NAC_DTM_ESALL_MP1_SHADE.BROWSE.PNG http://lroc.sese.asu.edu/data/LRO-L-LROC-5-RDR-V1.0/LROLRC_2001/EXTRAS/BROWSE/NAC_DTM/ESALL_MP1/NAC_DTM_ESALL_MP1_SLOPE_LEGEND.BROWSE.PNG http://lroc.sese.asu.edu/data/LRO-L-LROC-5-RDR-V1.0/LROLRC_2001/EXTRAS/BROWSE/NAC_DTM/ESALL_MP1/NAC_DTM_ESALL_MP1_SLOPE.BROWSE.PNG http://lroc.sese.asu.edu/data/LRO-L-LROC-5-RDR-V1.0/LROLRC_2001/EXTRAS/BROWSE/NAC_DTM/ESALL_MP1/NAC_DTM_ESALL_MP1_SLOPEBW.BROWSE.PNG http://lroc.sese.asu.edu/data/LRO-L-LROC-5-RDR-V1.0/LROLRC_2001/EXTRAS/BROWSE/NAC_DTM/ESALL_MP1/NAC_DTM_ESALL_MP1.BROWSE.PNG http://lroc.sese.asu.edu/data/LRO-L-LROC-5-RDR-V1.0/LROLRC_2001/EXTRAS/BROWSE/NAC_DTM/ESALL_MP1/NAC_DTM_ESALL_MP1_NACMOS_1M.BROWSE.PNG http://lroc.sese.asu.edu/data/LRO-L-LROC-5-RDR-V1.0/LROLRC_2001/EXTRAS/BROWSE/NAC_DTM/ESALL_MP1/NAC_DTM_ESALL_MP1_NACMOS_2M.BROWSE.PNG http://lroc.sese.asu.edu/data/LRO-L-LROC-5-RDR-V1.0/LROLRC_2001/EXTRAS/BROWSE/NAC_DTM/ESALL_MP1/NAC_DTM_ESALL_MP1_NACORT01_1M.BROWSE.PNG http://lroc.sese.asu.edu/data/LRO-L-LROC-5-RDR-V1.0/LROLRC_2001/EXTRAS/BROWSE/NAC_DTM/ESALL_MP1/NAC_DTM_ESALL_MP1_NACORT01_2M.BROWSE.PNG http://lroc.sese.asu.edu/data/LRO-L-LROC-5-RDR-V1.0/LROLRC_2001/EXTRAS/BROWSE/NAC_DTM/ESALL_MP1/NAC_DTM_ESALL_MP1_NACORT02_1M.BROWSE.PNG http://lroc.sese.asu.edu/data/LRO-L-LROC-5-RDR-V1.0/LROLRC_2001/EXTRAS/BROWSE/NAC_DTM/ESALL_MP1/NAC_DTM_ESALL_MP1_NACORT02_2M.BROWSE.PNG http://lroc.sese.asu.edu/data/LRO-L-LROC-5-RDR-V1.0/LROLRC_2001/EXTRAS/BROWSE/NAC_DTM/ESALL_MP1/NAC_DTM_ESALL_MP1_NACORT03_1M.BROWSE.PNG http://lroc.sese.asu.edu/data/LRO-L-LROC-5-RDR-V1.0/LROLRC_2001/EXTRAS/BROWSE/NAC_DTM/ESALL_MP1/NAC_DTM_ESALL_MP1_NACORT03_2M.BROWSE.PNG http://lroc.sese.asu.edu/data/LRO-L-LROC-5-RDR-V1.0/LROLRC_2001/EXTRAS/BROWSE/NAC_DTM/ESALL_MP1/NAC_DTM_ESALL_MP1_NACORT04_1M.BROWSE.PNG http://lroc.sese.asu.edu/data/LRO-L-LROC-5-RDR-V1.0/LROLRC_2001/EXTRAS/BROWSE/NAC_DTM/ESALL_MP1/NAC_DTM_ESALL_MP1_NACORT04_2M.BROWSE.PNG http://lroc.sese.asu.edu/data/LRO-L-LROC-5-RDR-V1.0/LROLRC_2001/EXTRAS/BROWSE/NAC_DTM/ESALL_MP1/NAC_DTM_ESALL_MP1_NACORT05_1M.BROWSE.PNG http://lroc.sese.asu.edu/data/LRO-L-LROC-5-RDR-V1.0/LROLRC_2001/EXTRAS/BROWSE/NAC_DTM/ESALL_MP1/NAC_DTM_ESALL_MP1_NACORT05_2M.BROWSE.PNG http://lroc.sese.asu.edu/data/LRO-L-LROC-5-RDR-V1.0/LROLRC_2001/EXTRAS/BROWSE/NAC_DTM/ESALL_MP1/NAC_DTM_ESALL_MP1_NACORT06_1M.BROWSE.PNG http://lroc.sese.asu.edu/data/LRO-L-LROC-5-RDR-V1.0/LROLRC_2001/EXTRAS/BROWSE/NAC_DTM/ESALL_MP1/NAC_DTM_ESALL_MP1_NACORT06_2M.BROWSE.PNG GENERAL NOTES: KNOWN ARTIFACTS These are known artifacts present in some, but not all, LROC NAC DTMs that are based upon DLR's processing. These artifacts may not be present in this DTM! Look at the terrain shaded relief and the confidence map to detect these before using the DTM! - NACL and NACR seams There are two NAC cameras (NACL & NACR) on board LRO. Stereo images are collected by acquiring images on two different orbits so the total parallax angle is greater than 12 degrees. The overlap between the four images (two pairs of NACL and NACR) provides three or four stereo models from which to collect elevation data. These stereo models are stitched together into one DTM. In some DTMs, the seams between the stereo models may be visible as long lines, usually up to 1 m difference. These seams are difficult to remove from the whole DTM. - Noise DTMs have varying level of noise from low signal images, low incidence angle, and jitter. The amount of noise may be detected using the slope map or the confidence map. PDS PRODUCT NAMING CONVENTION The PRODUCT_ID naming convention for LROC NAC DTMs is: NAC_DTM_xxxxxxxxxxx_AyyyBzzzz.IMG where - NAC_DTM = indicating it's a NAC DTM product - xxxxxxxxxx = words specifying the sitename (up to 11 characters) - A = projection type (E for equirectangular, P for polar stereographic) - yyy = center latitude (the center latitude is multiplied by 10 to retain the geographic position to the nearest 10th of a degree, then rounded to the nearest integer). - B = N for northern hemisphere, S for southern hemisphere - zzzz = center longitude (the actual center longitude is multiplied by 10 to retain the geographic position to the nearest 10th of a degree, then rounded to the nearest integer). The longitude domain for all NAC DTMs is 360 positive east. Example: NAC_DTM_LINNECRATER_E280N0120.IMG is a NAC DTM of Linne Crater located at latitude=28.0N, longitude=12.0E in equirectangular projection. RELATED DTM PRODUCTS For each NAC DTM, we also produce several related products. The naming convention for these products is: _ where refers to NAC_DTM_xxxxxxxxxxx and refers to the type of product (see details below). - Ortho-rectified images We provide ortho-rectified image mosaics in two resolutions (DTM resolution and image resolution). The mosaics include images with different illumination directions in order to provide best possible coverage with highest possible solar elevation. The for the mosaics is NACMOS. - Colorshade and colorshade legend The colorshade image is the color-coded topography draped over the shaded relief. The colorshade legend explains what the color means. The for the colorshade image is CLRSHADE and the colorshade legend is CLRSHADE_LEGEND. - Color slope map and slope map legend The color slope map is the color-coded slope (in discrete increments) draped over the shaded relief. The slope map legend explains what the color means. The for the color slope map is SLOPE and the slope map legend is SLOPE_LEGEND. - Shaded Relief The shaded relief image is generated with the sun azimuth of 315 degrees (northwest) and sun altitude of 45 degrees. The for the shaded relief image is SHADE - Confidence map The confidence map gives users a little guidance on what elevation values to trust and not to trust. Refer to the CONFIDENCE MAP TABLE LOOKUP below for the description of the pixel values. The for the confidence map is CONF. - DTM in GeoTIFF format We also provide the DTM in GeoTIFF format to allow users more flexibility in using the DTM. There are no for this file, and the filename is simply .tif - Readme The readme file contains description of the DTM, precision and accuracy information, description of known artifacts, naming convention, related products, and confidence table lookup. The for the readme file is README. CONFIDENCE MAP TABLE LOOKUP Value Description 0 NoDATA, outside boundary (e.g. out of stereo pair overlap) 1 Shadowed 4 Interpolated / Extrapolated (e.g. from neighbor pixels) 14 DTM information based upon successful correlations