Download this file

 PDS_VERSION_ID       = PDS3                                                 
LABEL_REVISION_NOTE       = "                                                
2010-02-12, M.J. Golightly:                                                  
                             --initial release;                              
                             --conforms to CRaTER SDR and Archive Volume     
                               SIS 32-01211), Rev E.;                        
2014-10-21, D. Kazden (PPI): Edited to apply to a single LRO CRaTER dataset; 
2014-12-23, PPI: Updated to accommodate new release;                         
2024-09-12, W. C. Aiken (PPI): Updated to accommodate new release;"          
                                                                             
OBJECT               = TEXT                                                  
  PUBLICATION_DATE   = 2024-09-13                                            
  NOTE               = "AAREADME.TXT describes this dataset."                
END_OBJECT           = TEXT                                                  
END                                                                          
                                                                             
                       LRO-L-CRAT-3/4-DDR-PROCESSED-V1.0                     
                                                                             
                2009-06-29T00:00:00.000 to 2024-06-30T23:59:59.53            
                                                                             
                                                                             
1. Introduction                                                              
                                                                             
   This volume contains Level 2 data products for CRaTER measurements made   
   during the LRO mission.  The products contains measured deposited energy  
   and estimated LET (silicon) for each charged particle (or photon)         
   interaction in the six silicon detectors that comprise CRaTER's           
   charged-particle telescope as well as instrument configuration and oper   
   operating parameters.  Ancillary data files produced by the LRO Mission   
   Operations Center for computing the spacecraft's location and orientation 
   are included with the data products.  The volume also contains product    
   documentation and copies of the 'pipeline process' software used to create
   the CRaTER data products.                                                 
                                                                             
   For more information about the volume directory structure, refer to the   
   CRaTER Standard Product Data Record and Archive Volume Software Interface 
   Specification (32-01211). A copy of thise document is located on this     
   volume as file VOLSIS.PDF in the DOCUMENT directory.                      
                                                                             
                                                                             
2. Disk Format                                                               
                                                                             
   Not applicable--these products are being delivered to PDS electronically. 
                                                                             
                                                                             
3. File Formats                                                              
                                                                             
Science Data File Format                                                     
                                                                             
   Level 2 (CRAT_L2_*.TAB) data files are ASCII tables whose comma-delimited 
   format is intended for ease of reading by commercial database and         
   spreadsheet software. Non-numeric fields are enclosed in double quotes and
   all fields are described by the CRAT_L2_*.FMT file in the LABEL           
   directory.                                                                
                                                                             
Document File Format                                                         
                                                                             
   Document files with the .TXT suffix exist in the root, CALIB, CATALOG,    
   DOCUMENT, INDEX, and SOFTWARE directories and their subdirectories.       
   These files are ASCII files with attached PDS labels and with line lengths
   that do not exceed 80 characters. Document files have variable-length     
   lines with an end-of-line designator consisting of a carriage-return      
   character followed by a linefeed character. This allows the files to be   
   read by the MacOS, Microsoft Windows, and Unix operating systems.         
                                                                             
Tabular File Format                                                          
                                                                             
   Tabular files (INDEX.TAB, GAPS_*.TAB) exist in the DATA, DOCUMENT, and    
   INDEX directories. These are ASCII files formatted for direct reading into
   many database management systems on various computers. Commas separate all
   fields, and character fields are enclosed in double quotation marks (").  
   Character fields are left justified and padded on the right with spaces to
   keep quotation marks in the same columns of successive records.  Number   
   fields are right justified and padded with spaces on the left to keep     
   fixed-width fields.  The records are of fixed length, and the last two    
   bytes of each record contain the ASCII carriage-return and line-feed      
   character. This allows a table to be treated as a fixed length record file
   on computers that support this file type and as a text file with embedded 
   line delimiters on those that don't.                                      
                                                                             
   Tabular files are described by PDS label files whose file names are the   
   same as the corresponding tabular file but with the extension ".LBL".     
                                                                             
PDS Label Format                                                             
                                                                             
   All data and tabular files in the CRaTER Archive Collection have          
   associated PDS labels. A PDS label, whether attached to or detached from  
   its associated file, provides descriptive information about the content   
   and format of the associated file. The PDS label is an object-oriented    
   structure consisting of sets of "keyword = value" declarations. The object
   to which the label refer (e.g. IMAGE, TABLE, etc.) denotes the form:      
                                                                             
       ^object = location                                                    
                                                                             
   in which the caret character (^, also called a pointer in this context)   
   indicates where to find the object. In an attached label, the location is 
   an integer representing the starting record number of the object (the     
   first record in the file is record 1). In a detached label, the location  
   denotes the name of the file containing the object, along with the        
   starting record or byte number, if there is more than one object in the   
   file.                                                                     
                                                                             
   For example:                                                              
                                                                             
       ^HEADER = ("F01.IMG",1)                                               
       ^IMAGE = ("F01.IMG",1025 ❮BYTES❯)                                     
                                                                             
   indicates that the IMAGE object begins at byte 1025 of the file F01.IMG,  
   in the same directory as the detached label file. Below is a list of the  
   possible formats for the ^object definition.                              
                                                                             
       ^object = n                                                           
       ^object = n❮BYTES❯                                                    
       ^object = "filename.ext"                                              
       ^object = ("filename.ext",n)                                          
       ^object = ("[dirlist]filename.ext",n)                                 
       ^object = ("filename.ext",n❮BYTES❯)                                   
       ^object = ("[dirlist]filename.ext",n❮BYTES❯)                          
                                                                             
       where:                                                                
                                                                             
       n is the starting record or byte number of the object, counting from  
       the beginning of the file (record 1, byte 1);                         
                                                                             
       ❮BYTES❯ indicates that the number given is in units of bytes;         
                                                                             
       filename is a maximum 27-alphanumeric upper-case character file name, 
       ext is the 3 upper-case character file extension;                     
                                                                             
       dirlist is an upper-case, period-delimited path-list of parent        
       directories, beginning at the directory level below the archive volume
       root directory, that specifies the object file directory (used only   
       when the object is not in the same directory as the label file).      
                                                                             
   Detached label files have variable length lines with an end-of-line       
   designator consisting of a carriage-return character followed by a line-  
   feed character.  This allows the files to be read by the MacOS, Microsoft 
   Windows, and Unix operating Systems.                                      
                                                                             
Catalog File Format                                                          
                                                                             
   Catalog files (suffix.CAT) exist in the root and CATALOG directories. They
   are formatted in an object-oriented structure consisting of sets of       
   "keyword = value" declarations.                                           
                                                                             
                                                                             
4. Volume Contents                                                           
                                                                             
   The files in this volume are organized in one top-level directory with    
   several subdirectories. The following outline shows the structure and     
   content of these directories. In the table, directory names are enclosed  
   in square brackets ([]), upper-case letters indicate actual directory or  
   file names, and lower-case letters indicate the general form of a set     
   of directory or file names.                                               
                                                                             
FILE/DIRECTORY                     DESCRIPTION                               
                                                                             
LROCRA_9002 Top-level directory                                              
   |                                                                         
   |- AAREADME.TXT    Describes volume contents and organization (ASCII text)
   |                                                                         
   |- ERRATA.TXT     A current cumulative listing of comments and updates    
   |                 concerning all standard products in this dataset.       
   |                                                                         
   |- VOLDESC.CAT      Description of the contents of this volume.           
   |                                                                         
   |- [INDEX]              Contains index tables for the data products on    
   |    |                  this volume.                                      
   |    |                                                                    
   |    |- INDXINFO.TXT    Description of the contents of this directory.    
   |    |                                                                    
   |    |- INDEX.LBL       Detached PDS label describing contents of         
   |    |                  INDEX.TAB.                                        
   |    |                                                                    
   |    |- INDEX.TAB       Index table file for the CRaTER data products in  
   |                       the current volume.                               
   |                                                                         
   |- [DOCUMENT]           Contains various documents that facilitate the    
   |    |                  understanding of the datasets included on this    
   |    |                  volume.                                           
   |    |                                                                    
   |    |- DOCINFO.TXT     Description of the contents of this directory.    
   |    |                                                                    
   |    |- MODE_CHANGES.LBL  PDS detached label file describing contents of  
   |    |                    MODE_CHANGES.TAB.                               
   |    |                                                                    
   |    |- MODE_CHANGES.TAB  Cumulative listing of instrument mode changes   
   |    |                    since launch.                                   
   |    |                                                                    
   |    |- VOLSIS.LBL      PDS detached label file describing contents of    
   |    |                  VOLSIS.HTM and associated graphics files.         
   |    |                                                                    
   |    |- VOLSIS.PDF      The SPDR and Archive Volume SIS (pdf format)..    
   |                                                                         
   |- [CATALOG]            This directory contains the catalog files.        
   |    |                                                                    
   |    |- CATINFO.TXT         Description of the contents of this directory.
   |    |                                                                    
   |    |- LRO_CRAT_INST.CAT   Information about the CRaTER instrument.      
   |    |                                                                    
   |    |- LRO_INST_HOST.CAT   Information about the LRO spacecraft.         
   |    |                                                                    
   |    |- LRO_MISSION.CAT     Information about the LRO mission.            
   |    |                                                                    
   |    |- LRO_PERSON.CAT      Contact information for CRaTER team members.  
   |    |                                                                    
   |    |- LRO_PROJ_REF.CAT    LRO Project references mentioned in other     
   |    |                      catalog files.                                
   |    |                                                                    
   |    |- LRO_CRAT_L2_DS.CAT  Description of the CRaTER Level 2 (RDR) data  
   |    |                      files.                                        
   |    |                                                                    
   |    |- LRO_CRAT_REF.CAT    CRaTER references mentioned in other catalog  
   |                           files.                                        
   |                                                                         
   |- [DATA]               This directory contains the CRaTER data products, 
                           organized into subdirectories by year.            
   |    |                                                                    
   |    |- DATAINFO.TXT    Description of the contents of this directory.    
   |    |                                                                    
   |    |- [yyyy]              Directory containing CRaTER data product files
   |         |                 for year "yyyy".                              
   |         |                                                               
   |         |- [yyyyddd]      Directory containing data products for day    
   |             |             "ddd" of year "yyyy".                         
   |             |                                                           
   |             |- CRAT_L2_HK_yyyyddd_Vnn.TAB  Level 2 housekeeping         
   |             |                              product (ASCII table)        
   |             |                                                           
   |             |- CRAT_L2_HK_yyyyddd_Vnn.LBL  PDS detached label describing
   |             |                              CRAT_L2_HK_yyyyddd_Vnn.DAT   
   |             |                                                           
   |             |- CRAT_L2_PRI_yyyyddd_Vnn.TAB Level 2 primary science      
   |             |                              product (ASCII table)        
   |             |                                                           
   |             |- CRAT_L2_PRI_yyyyddd_Vnn.LBL PDS detached label describing
   |             |                              CRAT_L2_PRI_yyyyddd_Vnn.DAT  
   |             |                                                           
   |             |- CRAT_L2_SEC_yyyyddd_Vnn.TAB Level 2 secondary science    
   |             |                              product (ASCII table)        
   |             |                                                           
   |             |- CRAT_L2_SEC_yyyyddd_Vnn.LBL PDS detached label describing
   |                                            CRAT_L2_SEC_yyyyddd_Vnn.DAT  
   |                                                                         
   |- [CALIB]              This directory contains a copy of the instrument's
   |    |                  calibration plan and reports describing           
   |    |                  calibration and performance results.              
   |    |                                                                    
   |    |- CALINFO.TXT     Description of the contents of this directory.    
   |    |                                                                    
   |    |- CRAT_CAL_PLAN.LBL    PDS detached label file describing           
   |    |                       CRAT_CAL_PLAN.HTM and associated graphics    
   |    |                       files.                                       
   |    |                                                                    
   |    |- CRAT_CAL_PLAN.PDF    CRaTER instrument calibration plan document  
   |    |                       (Acrobat format).                            
   |    |                                                                    
   |- [LABEL]                  This directory contains format files (*.FMT)  
   |    |                      describing the contents of the CRaTER data    
   |    |                      product files in the DATA subdirectories.     
   |    |                                                                    
   |    |- LABINFO.TXT         Description of the contents of this directory.
   |    |                                                                    
   |    |- CRAT_L2_HK.FMT      Byte-level description of Level 2 housekeeping
   |    |                      records.                                      
   |    |                                                                    
   |    |- CRAT_L2_PRI.FMT     Byte-level description of Level 2 primary     
   |    |                      science records.                              
   |    |                                                                    
   |    |- CRAT_L2_SEC.FMT     Byte-level description of Level 2 secondary   
   |    |                      science records.                              
   |                                                                         
   |                                                                         
   |- [SOFTWARE]               This directory contains the source code for   
        |                      software useful for reading and writing CRaTER
        |                      data product files.                           
        |                                                                    
        |- SOFTINFO.TXT        Description of the contents of this directory.
        |                                                                    
        |- PIPE2.ZIP           CRaTER Pipeline software.                     
        |                                                                    
        |- PIPE2.LBL           PDS detached label describing PIPE2.ZIP.      
        |                                                                    
        |- ZIPINFO.TXT         PDS information about compressed zip archives.
                                                                             
                                                                             
5. Recommended DVD Drives and Driver Software                                
                                                                             
   Not applicable for electronic delivery.                                   
                                                                             
                                                                             
6. Errata and Disclaimer                                                     
                                                                             
   A list of anomalies and errors is maintained in the file ERRATA.TXT at the
   root directory of this volume.                                            
                                                                             
   Known data uncertainties and limitations are described in the Level 0     
   (LRO_CRAT_L0_DS.CAT), Level 1 (LRO_CRAT_L1_DS.CAT), or Level 2            
   (LRO_CRAT_L2_DS.CAT) catalog files located in the CATALOG subdirectory.   
                                                                             
   Although considerable care has gone into making this volume, errors are   
   both possible and likely. Users of the data are advised to exercise the   
   same caution as they would when dealing with any other unknown data set.  
                                                                             
   Reports of errors or difficulties would be appreciated. Please contact one
   of the individuals listed below.                                          
                                                                             
                                                                             
7. Contact Information                                                       
                                                                             
   For questions concerning this volume, data products or documentation,     
   contact:                                                                  
                                                                             
       Michael J. Golightly                                                  
       University of New Hampshire                                           
       Institute for the Study of Earth, Oceans, and Space                   
       Morse Hall                                                            
       8 College Rd                                                          
       Durham, NH  03824-2600                                                
       Phone:  +1 603-862-1256                                               
       E-mail:  m.j.golightly@unh.edu                                        
                                                                             
       Harlan E. Spence                                                      
       University of New Hampshire                                           
       Institute for the Study of Earth, Oceans, and Space                   
       Morse Hall                                                            
       8 College Rd                                                          
       Durham, NH  03824-2600                                                
       Phone:  +1 603-862-4449                                               
       E-mail:  Harlan.Spence@unh.edu                                        
                                                                             
   For questions concerning PDS standards and usage, contact                 
                                                                             
       Steven P. Joy                                                         
       University of California                                              
       6855 Slichter Hall                                                    
       Los Angeles, CA 90095-1567 USA                                        
       Phone:  +1 310-825-3506                                               
       E-mail:  sjoy@igpp.ucla.edu