PDS_VERSION_ID = PDS3 RECORD_TYPE = STREAM SPACECRAFT_NAME = "CLEMENTINE 1" OBJECT = TEXT INTERCHANGE_FORMAT = ASCII PUBLICATION_DATE = 2002-05-31 NOTE = "Clementine LWIR Archive of Brightness Temperature Images" END_OBJECT = TEXT END PLEASE NOTE: This archive has been migrated from PDS3 to PDS4. The contents and directory structure of the PDS3 archive have not changed, but PDS4 metadata in the form of XML files have been added. The file readme.txt in the root directory has more information about the PDS4 version. The file you are now reading, AAREADME.TXT, was written for the original PDS3 archive and does not have information about the PDS4 additions. ---- Original contents of AAREADME.TXT are below this line. ---- Clementine LWIR Brightness Temperature Archive (CLEM1-L-LWIR-3-RDR-V1.0) AAREADME.TXT 31 May 2002 1. Introduction This volume contains the archive of Lunar brightness temperature data derived from images acquired by the Clementine Long Wavelength Infrared (LWIR) camera. The LWIR camera acquired approximately 220,000 thermal-infrared images of the lunar surface that were used to generate the brightness temperature images within this archive. The procedure for generating brightness temperature values can be summarized as follows: 1) original LWIR digital numbers were converted to radiance; 2) the dark current signal was subtracted from the radiance values; 3) a flat field correction was applied; 4) bad pixels were identified and smoothed over; and 5) calibrated radiance values were converted to brightness temperatures using the Planck function. Details of the processing are given in Lawson et al. (Journal of Geophysical Research, v. 105, pp. 4273-4290, 2000). This archive, including supporting documentation and file labels, conforms to the Planetary Data System (PDS) Standards, Version 3.4, Jet Propulsion Laboratory (JPL) Document JPL D-7669 Part 2 (6/15/2001) and the Planetary Science Data Dictionary, JPL Document JPL D-7116, Rev D (7/15/1996). These documents are available from the PDS web site (http://pds.jpl.nasa.gov). Additional documentation about this archive can be found in the files located in the DOCUMENT directory of this volume. PDS catalog object files containing information about the Clementine mission and spacecraft, the LWIR camera, and the brightness temperature data set are located in the CATALOG directory of this volume. Known errors, anomalies, and comments about the archive are documented in the ERRATA.TXT file in the root-level directory of this volume. 2. Volume Contents The volume organization and the contents of each directory are described below. Top-level Directory ------------------- AAREADME.TXT The file you are currently reading. ERRATA.TXT This file lists known errors and anomalies for this volume series. It is occasionally updated if additional notes about the archive are needed. VOLDESC.CAT This text file contains a description of the volume contents as a PDS3 catalog object. It is a required file on PDS archive volumes. CATALOG Directory ----------------- Files in the CATALOG directory are text files containing documentation formatted in PDS object description language. The files contain information about the Clementine mission and spacecraft, the LWIR instrument, the brightness temperature data set, personnel associated with the data and archive, and references. See the file CATINFO.TXT for details. DATA Directory -------------- The DATA directory contains Clementine LWIR brightness temperature image products. Images separated into subdirectories based on revolution number. See the file DATAINFO.TXT for additional details. DOCUMENT Directory ------------------ The DOCUMENT directory contains the volume documentation file. See the file DOCINFO.TXT for additional details. INDEX Directory --------------- The INDEX directory contains PDS3 index files for this archive. An index file is an ASCII table with each record (or line) in the table containing information about a single image in archive. See the file INDXINFO.TXT for additional details. 3. File Formats All document, detached PDS label, and table files in this archive are ASCII stream format files. File names with extension "TAB", "LBL", "TXT", and "CAT" are formatted as stream files. Records within stream files consisting of ASCII text are delimited with a carriage return (CR) and line feed (LF) sequence. MacOS, Windows, Unix, and VMS operating systems can read stream files in this format. Different computers interpret these codes differently. For example, PC/Windows systems use the two-byte / sequence to terminate a line of text. A UNIX system uses only a line feed, whereas a Macintosh uses only a carriage return. VAX computers support these various formats as stream files, but prefer to store text files internally as variable length records. PDS has adopted the / as the standard line delimiter for archival products. A / pair is the required line terminator for all PDS3 labels and catalog files. This is the only line terminator sequence that insures text files will be viewable on all computer systems. System utilities are available on the various computer types to convert this format to the internal format if necessary. Macintosh - Apple File Exchange, MS-DOS to Mac option. Unix - Translate utility (tr -d'\15' output_file) - DOS2UNIX utility (dos2unix input_file output_file) Tabular files are formatted so that they may be read directly into many database management systems. 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 / 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. PDS3 labels are object-oriented. A pointer statement of the form below denotes the object to which the label refers (IMAGE, TABLE, etc.): ^object = location where the carat character (^) indicates that the object starts at the given location. For an attached image label, the Clementine LWIR brightness temperature image archive uses the form: ^object = n where "n" points to the starting record location for the object. The first record in a file is designated as record 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 PDS3 object label specifications, consult the PDS3 Standards Document (JPL document D-7669). 4. Image Display The PDS provides software for displaying PDS format images on a variety of computer platforms. The application program for image display is called NASAView, which has versions for SUN/SOLARIS, WINDOWS, and LINUX platforms. The PDS distributes NASAView through its Web site. Consult the PDS Web site for the status of NASAView in terms of its capabilities and availability. The address for the PDS Web site is http://pds.jpl.nasa.gov/. Additional information on displaying LWIR brightness temperature images can be found in the documentation in the DOCUMENT directory. 5. Whom to Contact for Information For questions concerning this data set: PDS Geosciences Node Washington University Dept. of Earth and Planetary Sciences 1 Brookings Drive St. Louis, MO 63130 Web Site: http://pds-geosciences.wustl.edu Electronic mail address: geosci@wunder.wustl.edu 6. Cognizant Personnel The Clementine LWIR brightness temperature data set was produced by Dr. Stefanie L. Lawson, Los Alamos National Laboratory, Los Alamos, New Mexico and Dr. Bruce M. Jakosky, University of Colorado, Boulder, Colorado. The PDS archive and volume structure was designed and produced by Dr. Edward A. Guinness, Planetary Data System Geosciences Node, Washington University, St. Louis, Missouri. 7. Citation The Clementine LWIR brightness temperature data set published on this volume may be cited in scientific literature using the following reference. Lawson, S. L. and B. M Jakosky, "Clementine LWIR Brightness Temperature Archive", NASA Planetary Data System, CLEM1-L-LWIR-3- RDR-V1.0, 2002.