LRO NAC DEM Apollo 15 26N004E 150cmp

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This is a digital elevation model (DEM) extracted from the Lunar Reconnaissance Orbiter Camera (LROC) Narrow Angle Camera (NAC) stereo images from the Lunar Reconnaissance Orbiter mission. The original data product is a DEM from stereo images acquired at approximately 0.5 meters/pixel resolution, which allows an output DEM resolution of 1.5 to 2.0 meters/pixel using a softcopy photogrammetry system. However, in some cases, LROC DEMs were also generated at lower resolutions. The DEM was registered horizontally and vertically to LRO's Lunar Orbiter Laser Altimeter (LOLA) data. Elevation values are in meters and referred to a radius of 1737400m.

Mimetype: image/tiff
Filename: LRO_NAC_DEM_Apollo_15_26N004E_150cmp.tif
Publisher: Jet Propulsion Laboratory (JPL)
Publication Date: 21 May 2011
Originator: USGS Astrogeology Science Center
Group: Astrogeology
Added to Astropedia: 24 October 2013
Modified: 3 November 2017

General

Purpose: The NASA Constellation Program (CxP) has identified 50 regions of interest on the Moon that the LROC NAC will image. A DEM is generated for each of these resgions using the acquired NAC images. High resolution DEMs will be essential for identifying potential landing sites, landing site hazards, placement of landed assets on the surface, as well as other surface operations and navigation needs. Site-specific DEMs will also serve as a foundation for ortho-projection and control of local/site mosaics.
Geospatial Data Presentation Form: Digital Elevation Model

Keywords

System: Earth
Target: Moon
Theme: Topography
Mission: Lunar Reconnaissance Orbiter
Instrument: LROC

Data Status and Quality

Currentness Reference: Ground condition
Progress: Complete
Update Frequency: None planned
Process Date: 21 May 2011
Process Description: The processing approach to generate DEMs uses both the USGS digital cartographic system Integrated Software for Imagers and Spectrometers (ISIS) and the commercial photogrammetric software SOCET SET (BAE Systems). ISIS provides an end-to-end system for the analysis of digital images and production of image maps. Its stereo capabilities are, however, limited. SOCET SET is tailored to aerial and Earth-orbital imagery but provides a complete workflow with modules for bundle adjustment (MST), automatic stereomatching (ATE), and interactive quality control/editing of DTMs with stereo viewing (ITE). Our processing approach for LROC stereo datasets has been to use ISIS to ingest images in an archival format, decompress them as necessary, and perform instrument-specific radiometric calibration. Software written in ISIS is used to translate the image and, more importantly, orientation parameters and other metadata, to the formats understood by SOCET SET. The commercial system is then used for "three-dimensional" processing: bundle-adjustment (including measurement of needed control points), DTM generation, and DTM editing. Final steps such as orthrectification and mosaicking of images can be performed either in SOCET SET or in ISIS after exporting the DTM data. Finally, the Geospatial Data Abstraction Library (GDAL) tools were used to convert the final products to GeoTIFF. > The shadows in the DEM were masked and images were used to fill in the shadowed areas where possible. > LROC Images used: M111571816LE.IMG, M111571816LE.IMG, M111571816RE.IMG, M111571816RE.IMG, M129262613LE.IMG, M129262613LE.IMG, M129262613RE.IMG, M129262613RE.IMG, M135161289LE.IMG, M135161289LE.IMG, M135161289RE.IMG, M135161289RE.IMG, M142238148LE.IMG, M142238148LE.IMG, M142238148RE.IMG, M142238148RE.IMG, M152852290LE.IMG, M152852290LE.IMG, M152852290RE.IMG, M152852290RE.IMG, M159929419LE.IMG, M159929419LE.IMG, M159929419RE.IMG, M159929419RE.IMG.
Horizontal Positional Accuracy Value: 24.1
Vertical Positional Accuracy Value: 10.3
Entity and Attribute Overview: Height (Elevation m) = DN; Planetary Radius = DN + 1737400m
Entity and Attribute Detailed Description: Archinal, B. A., et al., (2011). Report of the IAU Working Group on Cartographic Coordinates and Rotational Elements: 2009, Cel. Mech. and Dyn. Ast., 109, no. 2, 101, DOI 10.1007/s10569-010-9320-4. URL: http://www.springerlink.com/content/g272325h45517581/

Geospatial Information

Minimum Latitude: 25.4546163
Maximum Latitude: 26.76410221
Minimum Longitude: 3.02716656
Maximum Longitude: 3.84963785
Object Type: Pixel
Lines (pixels): 26472
Samples (pixels): 14944
Bit Type: 32
Quad Name: LQ-12
Bands: 1
Pixel Resolution (meters/pixel): 1.5
Scale (pixels/degree): 20215.5669
Map Projection Name: Equirectangular
Latitude Type: Planetocentric
Longitude Direction: Positive East
Longitude Domain: 0 to 360

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