NSSDCA ID: PSPG-00805
Availability: Archived at NSSDC, accessible from elsewhere
These data are available online from PDS at: http://pds-imaging.jpl.nasa.gov/volumes/clementine.html#clmBASE
This description was generated automatically using input from the Planetary Data System.
Data Set Overview ================= The Clementine Basemap Mosaic is a full-resolution (100 meters per pixel) global mosaic produced by the U.S. Geological Survey from Clementine EDR Data. The 750 nanometer filter imaging data acquired by the Ultraviolet/Visible Camera were used to create the single-band basemap mosaic. The Clementine Basemap Mosaic is partitioned on the CD collection in the Sinusoidal Equal-Area Projection as 12 'zones', each 30 degrees wide in longitude and ranging from 70 degrees south latitude to 70 degrees north latitude. All tiles in a zone have the same center longitude of projection. Both polar regions between 70 degrees to 90 degrees latitude exist both as Sinusoidal and polar stereographic projections. Each zone and each polar region exist on one CD-ROM volume. This results in a 14-volume archive set containing the full resolution (0.1 km/pixel) mosaic. A fifteenth volume, containing reduced-resolution planetwide coverage at .5, 2.5, and 12.5 km/pixel and other ancillary data, complete the archive collection. For each full- and reduced- resolution image product, a sub-sampled 'browse' image is provided in Joint Photographic Experts Group (JPEG) format. Each 30 degree zone is further divided into smaller tiles. The tiling scheme, basic to digital cartography design, is similar to previous planetary global mosaics, and maintains reasonably sized image products. In general, this design consists of rectangular tiles that are roughly 2100 pixels on a side. The actual tile size varies with latitude. Near the equator, each tile covers 7 degrees of latitude and 6 degrees of longitude. A typical full-resolution tile required ~9 megabytes of digital storage and may contain approximately 35 raw Clementine images. Parameters ========== N/A
Processing ========== The Integrated Software for Imaging Spectrometers (ISIS) processing system, developed by the U.S. Geological Survey was used to generate the basemap mosaic. Processing within ISIS includes radiometric and geometric correction, spectral registration, photometric normalization, and image mosaicking. Radiometric correction applies 'flat fielding', dark current subtraction, non-linearity correction, and conversion to radiometric units. Geometric transformations tie each raw image with a ground control network and convert from raw image coordinates to the Sinusoidal Equal-Area projection. Photometric normalization is applied to balance brightness variations due to illumination differences among the images in a mosaic. Images are then mosaicked together to form a global map of continuous image coverage for the entire planet. Media/Format ============ The Clementine basemap is delivered to the Planetary Data System using CD media. Formats are based on standards for such products established by the Planetary Data System (PDS) [PDSSR1992]. These data are available on-line from the Planetary Data System (PDS) at: ftp://pdsimage2.wr.usgs.gov/cdroms/clementine/cl_3001/
Questions and comments about this data collection can be directed to: Dr. David R. Williams
Name | Role | Original Affiliation | |
---|---|---|---|
Dr. Eugene M. Shoemaker | Data Provider | ||
Dr. Alfred S. McEwen | General Contact | University of Arizona | mcewen@pirl.lpl.arizona.edu |