PDS_VERSION_ID      = PDS3                                                    
RECORD_TYPE         = FIXED_LENGTH                                            
RECORD_BYTES        = 80                                                      
OBJECT              = TEXT                                                    
  PUBLICATION_DATE    = 2015-08-11                                            
  NOTE                = "Description of contents of CALIB directory "         
END_OBJECT          = TEXT                                                    
END                                                                           
                                                                              
                                                                              
                                                                              
      The CALIB directory contains binary and ASCII receiver frequency        
files.  A 'sky frequency' file gives the expected spacecraft carrier          
frequency at the feed of the DSN receiving station antenna.  A POCA           
file gives the frequency and rate of change of frequency of the DSN           
receiver Programmable Oscillator Control Assembly.  The POCA is the           
DSN module which actively tunes the receiver to follow a drifting             
spacecraft signal (the software equivalent of the receiver's local            
oscillator).                                                                  
                                                                              
     Each file is accompanied by a detached PDS label.  Each label is an      
ASCII file with 80 character records.  Records are delimited by the ASCII     
carriage-return (ASCII 13) line-feed (ASCII 10) pair at the end of each       
line (positions 79 and 80).                                                   
                                                                              
     The files are:                                                           
                                                                              
CALINFO.TXT                                                                   
                                                                              
     This file, which gives a brief summary of the directory contents.        
                                                                              
VG1SPOC1.DAT                                                                  
                                                                              
     This file, provided to the Voyager Radio Science Team by Don             
Sweetnam of the Jet Propulsion Laboratory, gave Voyager 1 sky frequencies     
in a non-ASCII character format.  The data file is accompanied                
by a minimal PDS label with name VG1SPOC1.LBL which briefly explains          
the character coding.                                                         
                                                                              
                                                                              
VG1SPOC3.DAT                                                                  
                                                                              
     This file, provided to the Voyager Radio Science Team by Don             
Sweetnam of the Jet Propulsion Laboratory, gave Voyager 1 sky frequencies     
in a non-standard binary format.  The data file is accompanied                
by a minimal PDS label with name VG1SPOC3.LBL which briefly explains          
the record format.                                                            
                                                                              
VG1SPOC4.TAB                                                                  
                                                                              
     This is an ASCII conversion of the VG1SPOC3.DAT file.  It is             
stored as a PDS TABLE object.  The file gives sky frequency as a              
function of time.  The detailed format and contents of the file are           
described in the accompanying PDS label file VG1SPOC4.LBL.                    
                                                                              
VG1SPOC5.DAT                                                                  
                                                                              
     This binary POCA file, provided by the Jet Propulsion Laboratory,        
was part of the Voyager Radio Science data delivery.  The data file is        
accompanied by a minimal PDS label with name VG1SPOC5.LBL.  The format        
and contents of the file are described in file RSC_11_5.TXT in the            
DOCUMENT directory.                                                           
                                                                              
VG1SPOC6.TAB                                                                  
                                                                              
     This is an ASCII conversion of the binary POCA file VG1SPOC6.DAT.        
It is stored as a PDS TABLE object.  The file gives frequency and             
frequency rate of the receiver local oscillator at one second increments      
during the Voyager 1 Saturn radio occultation.  The detailed format and       
contents of the file are described in the accompanying PDS label file         
VG1SPOC6.LBL.