PDS_VERSION_ID = PDS3 RECORD_TYPE = STREAM SPACECRAFT_NAME = "CLEMENTINE 1" TARGET_NAME = "MOON" OBJECT = TEXT INTERCHANGE_FORMAT = ASCII PUBLICATION_DATE = 1998-09-12 NOTE = "CLEMENTINE HIRES POLAR MOSAIC" END_OBJECT = TEXT END CLEMENTINE BASEMAP MOSAIC Table of Contents 1. - INTRODUCTION 2. - DISK FORMAT 3. - FILE FORMATS 4. - CD CONTENTS, DIRECTORY, AND FILENAMING CONVENTIONS 5. - CONTACTS FOR MORE INFORMATION 1. INTRODUCTION This compact disk (CD) is part of the Clementine I high resolution (HiRes) camera lunar image mosaics developed by Malin Space Science Systems (MSSS). These mosaics were developed through calibration and semi-automated registration against the recently released geometrically and photometrically controlled Ultraviolet/Visible (UV/Vis) Basemap Mosaic, which is available through the PDS, as CD-ROM volumes CL_3001-3015. The HiRes mosaics are compiled from non-uniformity corrected, 750 nanometer ("D") filter high resolution observations from the HiRes imaging system onboard the Clementine Spacecraft. The geometric control is provided by the U. S. Geological Survey (USGS) Clementine Basemap Mosaic compiled from the 750 nm Ultraviolet/Visible Clementine imaging system. Calibration was achieved by removing the image nonuniformity largely caused by the HiRes system's light intensifier. Also provided are offset and scale factors, achieved by a fit of the HiRes data to the corresponding photometrically calibrated UV/Vis basemap that approximately transform the 8-bit HiRes data to photometric units. The mosaics on this CD are compiled from polar data (latitudes greater than 80 degrees), and are presented in the stereographic projection at a scale of 30 m/pixel at the pole, a resolution 5 times greater than that (150 m/pixel) of the corresponding UV/Vis polar basemap. This 5:1 scale ratio is in keeping with the sub- polar mosaic, in which the HiRes and UV/Vis mosaics had scales of 20 m/pixel and 100 m/pixel, respectively. The equal-area property of the stereographic projection made this preferable for the HiRes polar mosaic rather than the basemap's orthographic projection. Thus, a necessary first step in constructing the mosaic was the reprojection of the UV/Vis basemap to the stereographic projection. The HiRes polar data can be naturally grouped according to the orbital periapsis, which was in the south during the first half of the mapping mission and in the north during the second half. Images in each group have generally uniform intrinsic resolution, illumination, exposure and gain. Rather than mingle data from the two peripsis epochs, separate mosaics are provided for each, a total of 4 polar mosaics. The mosaics are divided into 100 square tiles of 2250 pixels (approximately 2.2 deg near the pole) on a side. Not all squares of this grid contain HiRes mosaic data, some inevitably since a square is not a perfect representation of a (latitude) circle, others due to the lack of HiRes data. This CD also contains ancillary data files that support the HiRes mosaic. These files include browse images with UV/Vis context stored in a Joint Photographic Experts Group (JPEG) format, index files ('imgindx.tab' and 'srcindx.tab') that tabulate the contents of the CD, and documentation files. For more information on the contents and organization of the CD volume set refer to the "FILES, DIRECTORIES AND DISK CONTENTS" section of this document. The Clementine HiRes Mosaic was compiled for the National Aeronautics and Space Administration (NASA) by Malin Space Science Systems personnel under the direction of Dr. Michael C. Malin, principal Investigator. Jeff Warren and Rick Adair comprised the technical group responsible for its compilation. The image files are organized according to NASA's Planetary Data System (PDS) standards. An image file (tile) is organized as a PDS labeled file containing an "image object". 2. DISK FORMAT This disk has been formatted so that a variety of computer systems (e.g. IBM/PC compatible, Macintosh, Sun) may access the data. Specifically, it is formatted according to the ISO 9660 level 1 Interchange Standard. For further information, refer to the ISO 9660 Standard Document: Reference Number ISO 9660-1988, 15 April 1988. The extended attribute records (XAR) supported by the ISO are not used in this volume series. The lack of XARs on a file only affects the VAX/VMS user community. It will be necessary for VAX/VMS users to use the VMS CONVERT utility to convert document and text files before they can be satisfactorily accessed. VAX/VMS users can contact the PDS Imaging Node for support of the Clementine HiRes Mosaic CDs. 3. FILE FORMATS All document files and tables are stored as ASCII stream-record files. In a stream-record file, records (lines of text) are separated by a carriage-return and line-feed character sequence. The / sequence marks the end-of-record and the start of a new record. This organization works well for the Microsoft-DOS systems because the / sequence is identically used on these systems. On Macintosh systems, an end- of-record mark is simply a character. Macintosh text editors can read and access these files, but a special-character indicator (usually a "square box" character) will mark the "extraneous" character at the beginning of each line. On UNIX systems, an end- of-record mark is simply a character. UNIX text editors can read and access these files, but a special-character (usually a ^M sequence) indicator will mark the "extraneous" character at the end of each line. File names with extension "TAB", "LBL", "LAB", "TXT", and "CAT" are formatted as ASCII stream-record file. Tabular files are formatted so that they may be read directly into many database management systems of various computers. All fields are separated by commas, and character fields are enclosed in double quotation marks ("). Character fields are left justified, and numeric fields are right justified. The "start byte" and "bytes" values listed in the labels that describe the tabular files do not include the commas between fields or the quotation marks surrounding character fields. The records are of fixed length, and the last two bytes of each record contain the ASCII / characters. This scheme allows a table to be treated as a fixed- length record file on computers that support this file type and as a normal text file on other computers. PDS labels are object-oriented. The object to which the label refers (IMAGE, TABLE, etc.) is denoted by a statement of the form: ^object = location in which the carat character (^) indicates that the object starts at the given location. In an embedded label, the Clementine Base Map image archive uses the form: ^object = n where "n" points to the starting byte location of the object. (The first byte in a file is designated as byte location 1.) For detached labels (labels existing in their own file) the object location is signified as: ^object = "file.nam" In this form, the object of the label description exists in the file named "file.nam". For a description of the PDS object label specifications, consult JPL document D-7669. 4. CD CONTENTS, DIRECTORY, AND FILENAMING CONVENTION The files on this CD are organized starting at the root or 'parent' directory. Below the parent directory is a directory tree containing data, documentation, and index files. In the table below directory names are indicated by brackets (<...>), upper-case letters indicate an actual directory or file name, and lower-case letters indicate the general form of a set of directory or file names. DIRECTORY/FILE CONTENTS ------------------- ------------------------------------------ | |-INDEX.HTM Starting point for web-browsing CD | contents. | |-BRWSGRF.HTM Graphics browser web document | |-AAREADME.TXT The file you are reading (ASCII Text). | |-ERRATA.TXT Description of known anomalies and errors | present on the volume set(optional file). | |-VOLDESC.CAT A description of the contents of this | CD volume in a format readable by | both humans and computers. | |- Catalog Directory | | | |-CATINFO.TXT Describes Contents of the Catalog | | directory | | | |-DATASET.CAT Clementine HiRes Mosaic description. | | | |-DSMAP.CAT Map Projection description. | | | |-INSTHOST.CAT Clementine Spacecraft description. | | | |-MISSION.CAT Clementine Mission description. | | | |-PERSON.CAT Contributors to Clementine HiRes mosaic. | | | |-REF.CAT References for Clementine HiRes mosaic. | | | |-HRESINST.CAT HiRes Camera description. | |- Documentation Directory. The files in | | this directory provide detailed information | | regarding the Clementine HiRes Mosaic. | | | |-DOCINFO.TXT Description of files in the DOCUMENT | | directory. | | | |-VOLINFO.TXT Documentation regarding the | | contents of this CD Volume Set. | | | |-VOLINFO.HTM Documentation regarding the | | contents of this CD Volume Set in HTML | | format. | | | |-VOLINFO.LBL PDS Label file describing the VOLINFO | | documents. | |- Directory for the image index files. | | | |-INDXINFO.TXT Description of files in directory. | | | |-IMGINDX.TAB Image Index table. | | | |-IMGINDX.LBL PDS label for IMGINDX.TAB. | | | |-SRCINDX.TAB Table of source images used in the | | production of the Clementine HiRes mosaic. | | | |-SRCINDX.LBL PDS Label for SRCINDX.TAB | | |- Data directory encompassing one quadrant | | of the full polar mosaic. Quadrants are | | numbered in the positive longitude | | direction beginning with 1 in the 0-90 | | deg range. | | | |- Polar mosaic data product in PDS format. | | Filename is coded as follows: | | | | G = indicates 30 m/pixel resolution at | | the pole | | nn = two digit center latitude | | (INT(latitude)) | | e = N (North latitude) | | S (South latitude) | | p = N (North periapsis) | | S (South periapsis) | | mmm = three-digit center longitude | | (INT(longitude)) | | | |- Subdirectory containing browse images for | | HTML interface. | | | | | |- Browse image in JPEG format at 1/5th scale | | | with UV/Vis context for corresponding PDS | | | image. | | | | | |- Browse HTML file for for corresponding PDS | | | image. | | |- Directory containing 1/30th scale | | thumbnails of polar mosaic | | atop UV/Vis basemap context. | | | |- Thumbnail browse image in JPEG format at | | 1/30th scale with UV/Vis context for | | corresponding PDS image; named as above. 5. CONTACTS FOR MORE INFORMATION For details regarding generation of the Clementine HiRes Mosaic ------------------------------------------------------------------ Dr. Michael C. Malin Malin Space Science Systems (619) 552-2650 info@msss.com For overall content, design, and archive of the Clementine HiRes DIM as presented on this CD volume set: ---------------------------------------------------------- Jeff Warren or Rick Adair Malin Space Science Systems