PDS_VERSION_ID     = PDS3                                                     
RECORD_TYPE        = "FIXED_LENGTH"                                           
RECORD_BYTES       = 80                                                       
                                                                              
OBJECT             = TEXT                                                     
  NOTE             = "                                                        
    AAREADME file for the Deep Impact Radio Science Data                      
    Archive of the 9P/Tempel 1 Encounter"                                     
  PUBLICATION_DATE = 2006-09-29                                               
END_OBJECT         = TEXT                                                     
                                                                              
END                                                                           
                                                                              
Introduction                                                                  
============                                                                  
                                                                              
  This volume contains raw Radio Science data for the Deep Impact flyby       
  spacecraft, collected from June 27 through July 11, 2005, during            
  the encounter with comet 9P/Tempel 1.  There was no comet gravity           
  signal detected in the tracking data and hence no gravity science.          
  In addition, there was no evidence in the spacecraft tracking data          
  for dust or gas drag near the time of closest approach.                     
                                                                              
                                                                              
Volume Format                                                                 
=============                                                                 
                                                                              
  This volume has been formatted according to the ISO-9660 Level 2            
  Interchange Standard for directory and file naming.  All other              
  aspects of the volume follow the ISO-9660 Level 1 standard.                 
                                                                              
                                                                              
File Formats                                                                  
============                                                                  
                                                                              
  All text documents and other meta information files such as                 
  descriptions, PDS object definitions and detached PDS labels are            
  stream format files, with a carriage return (ASCII 13) and a line           
  feed character (ASCII 10) at the end of the record.  This allows            
  the files to be read by various operating systems.                          
                                                                              
                                                                              
Volume Contents                                                               
===============                                                               
                                                                              
  Files on this volume are organized into a set of subdirectories             
  below the top-level directory. The following table shows the                
  structure and content of these directories. In the table, directory         
  names are enclosed in square brackets ([]). See the *INFO.TXT files         
  in some directories for specific information on the files in that           
  directory.                                                                  
                                                                              
  [TOP-LEVEL-DIRECTORY]                                                       
  |                                                                           
  |-- AAREADME.TXT         This file                                          
  |                                                                           
  |-- VOLDESC.CAT          Description of the contents of this volume         
  |                                                                           
  |--[CATALOG]             Directory containing PDS catalog objects           
  |  |                                                                        
  |  |-- CATINFO.TXT       Description of files in this subdirectory          
  |  |-- DATASET.CAT       Description of this data set                       
  |  |-- RSS.CAT           Description of the Radio Science Subsystem         
  |  |-- DIF.CAT           Description of the Flyby spacecraft                
  |  |-- DEEP_IMPACT.CAT   Description of the Deep Impact mission             
  |  |-- PERSONNEL.CAT     Description of personnel who created this volume   
  |  |-- REFERENCE.CAT     List of publications mentioned in catalog files    
  |  |-- 9P_TEMPEL_1_1867_G1.CAT  Description of mission target, 9P/Tempel 1  
  |                                                                           
  |--[DATA]                                                                   
  |  |                                                                        
  |  |--[EOP]              Directory of earth-orientation products            
  |  |  |                                                                     
  |  |  |-- *.EOP          Earth-orientation parameter file                   
  |  |  |-- *.LBL          PDS label for *.EOP file                           
  |  |                                                                        
  |  |--[ION]              Directory of ionosphere calibration products       
  |  |  |                                                                     
  |  |  |-- *.ION          Ionosphere calibration file                        
  |  |  |-- *.LBL          PDS label for *.IOP file                           
  |  |                                                                        
  |  |--[ODF]              Directory of doppler and sequential range products 
  |  |  |                                                                     
  |  |  |-- *.ODF          Doppler and sequential range data files            
  |  |  |-- *.LBL          PDS label for *.ODF files                          
  |  |                                                                        
  |  |--[TRO]              Directory of troposphere calibration products      
  |     |                                                                     
  |     |-- *.TRO          Troposphere calibration files                      
  |     |-- *.LBL          PDS label for *.TRO files                          
  |                                                                           
  |--[DOCUMENT]            Directory for related documents                    
  |  |                                                                        
  |  |-- DOCINFO.TXT       Refers user to relevant documents                  
  |  |-- TRK_2_21.ASC      SIS for EOP data                                   
  |  |-- TRK_2_21.LBL      PDS label for TRK_2_21.ASC                         
  |  |-- TRK_2_23.ASC      SIS for media calibration data                     
  |  |-- TRK_2_23.LBL      PDS label for TRK_2_23.ASC                         
  |                                                                           
  +--[INDEX]               Directory containing index files                   
     |                                                                        
     |-- INDXINFO.TXT      Description of files in the INDEX directory        
     |-- INDEX.TAB         Table listing the data files in this data set      
     |-- INDEX.LBL         PDS label for INDEX.TAB                            
     |-- CHECKSUM.TAB      MD5 checksum file for this volume                  
     |-- CHECKSUM.LBL      PDS label for CHECKSUM.TAB                         
                                                                              
                                                                              
Whom to Contact for Information                                               
===============================                                               
                                                                              
  Questions regarding the scientific elements of this data set should be      
  directed to:                                                                
                                                                              
    Jon Giorgini                                                              
    Deep Impact Radio Science Team                                            
    Jet Propulsion Laboratory                                                 
    Mail Stop 301-150                                                         
    4800 Oak Grove Drive                                                      
    Pasadena, California 91109-8099 USA                                       
                                                                              
  Questions regarding the PDS elements in this data set should be             
  directed to:                                                                
                                                                              
    Stephanie McLaughlin                                                      
    Deep Impact Archive Team                                                  
    Department of Astronomy, University of Maryland                           
    College Park, Maryland 20742-2421 USA