PDS_VERSION_ID               = PDS3                                           
                                                                              
                                                                              
/* FILE CHARACTERISTICS DATA ELEMENTS */                                      
                                                                              
RECORD_TYPE                  = FIXED_LENGTH                                   
RECORD_BYTES                 = 2880 /* FITS standard record length */         
FILE_RECORDS                 = 33                                             
FILE_NAME                    = "RA_160618113552_HIS0_ENG.FIT"                 
DATA_FORMAT                  = FITS                                           
                                                                              
                                                                              
/* DATA OBJECT POINTERS IDENTIFICATION DATA ELEMENTS */                       
^HEADER                      = ("RA_160618113552_HIS0_ENG.FIT",1)             
^IMAGE                       = ("RA_160618113552_HIS0_ENG.FIT",7)             
^PULSE_HEIGHT_HEADER         = ("RA_160618113552_HIS0_ENG.FIT",30)            
^PULSE_HEIGHT_TABLE          = ("RA_160618113552_HIS0_ENG.FIT",31)            
^COUNT_RATE_HEADER           = ("RA_160618113552_HIS0_ENG.FIT",32)            
^COUNT_RATE_SERIES           = ("RA_160618113552_HIS0_ENG.FIT",33)            
                                                                              
                                                                              
/* OBSERVATION AND EXPOSURE DATA ELEMENTS */                                  
                                                                              
INSTRUMENT_MODE_ID           = "HIS" /* HIS, PIX, CNT */                      
INSTRUMENT_MODE_DESC         = "HISTOGRAM"                                    
START_TIME                   = 2016-06-18T11:35:52.054 /* UTC */              
STOP_TIME                    = 2016-06-18T11:40:54.443 /* UTC */              
SPACECRAFT_CLOCK_START_COUNT = "1/0424870465.28432"                           
SPACECRAFT_CLOCK_STOP_COUNT  = "1/0424870767.53919"                           
EXPOSURE_DURATION            = 302.390 /* SECONDS */                          
DATA_QUALITY_ID              = "0"                                            
DATA_QUALITY_DESC            = "All data packets for this file were received" 
MISSION_PHASE_NAME           = "ROSETTA EXTENSION 2"                          
OBSERVATION_TYPE             = "N/A"                                          
TARGET_NAME                  = "67P/CHURYUMOV-GERASIMENKO 1 (1969 R1)"        
TARGET_TYPE                  = "COMET"                                        
TARGET_DESC                  = "67P/Churyumov-Gerasimenko"                    
                                                                              
                                                                              
/* INSTRUMENT AND MISSION DESCRIPTIVE DATA ELEMENTS */                        
                                                                              
INSTRUMENT_ID                = "ALICE"                                        
INSTRUMENT_NAME              = "ALICE"                                        
INSTRUMENT_TYPE              = "ULTRAVIOLET SPECTROMETER"                     
INSTRUMENT_HOST_ID           = "RO"                                           
INSTRUMENT_HOST_NAME         = "ROSETTA-ORBITER"                              
MISSION_ID                   = "ROSETTA"                                      
MISSION_NAME                 = "INTERNATIONAL ROSETTA MISSION"                
                                                                              
                                                                              
/* PRODUCT, DATA SET, AND VOLUME DATA ELEMENTS */                             
                                                                              
PRODUCT_ID                   = "RA_160618113552_HIS0_ENG"                     
PRODUCT_TYPE                 = EDR /* CODMAC Data Level 2 */                  
PRODUCT_CREATION_TIME        = 2016-07-14T13:26:47                            
DATA_SET_ID                  = "RO-C/CAL-ALICE-2-EXT2-V1.0"                   
DATA_SET_NAME                = "ROSETTA-ORBITER 67P/CAL ALICE 2 EXT2 V1.0"    
PRODUCER_ID                  = "ROSETTA_ALICE"                                
PRODUCER_FULL_NAME           = "ANDREW J. STEFFL"                             
PRODUCER_INSTITUTION_NAME    = "SOUTHWEST RESEARCH INSTITUTE"                 
                                                                              
                                                                              
/* DATA OBJECT DEFINITIONS */                                                 
                                                                              
OBJECT                       = HEADER                                         
  BYTES                      = 17280 /* RECORD_BYTES x RECORDS */             
  HEADER_TYPE                = FITS                                           
  INTERCHANGE_FORMAT         = ASCII                                          
  RECORDS                    = 6                                              
  DESCRIPTION                = "                                              
    FITS header for Rosetta-Alice uncalibrated (CODMAC Data Level 2)          
    histogram observation."                                                   
END_OBJECT                   = HEADER                                         
                                                                              
                                                                              
OBJECT                       = IMAGE                                          
  LINE_SAMPLES               = 1024 /* FITS NAXIS1 keyword */                 
  LINES                      = 32 /* FITS NAXIS2 keyword */                   
  SAMPLE_BITS                = 16                                             
  SAMPLE_TYPE                = MSB_INTEGER                                    
  INTERCHANGE_FORMAT         = BINARY                                         
  OFFSET                     = 32768 /* FITS BZERO keyword */                 
  SCALING_FACTOR             = 1 /* FITS BSCALE keyword */                    
  AXIS_ORDER_TYPE            = FIRST_INDEX_FASTEST                            
  LINE_DISPLAY_DIRECTION     = UP                                             
  SAMPLE_DISPLAY_DIRECTION   = RIGHT                                          
  DESCRIPTION                = "                                              
    FITS image for Rosetta-Alice uncalibrated (CODMAC Data Level 2)           
    histogram observation. Units are raw data numbers."                       
END_OBJECT                   = IMAGE                                          
                                                                              
                                                                              
OBJECT                       = PULSE_HEIGHT_HEADER                            
  BYTES                      = 2880 /* RECORD_BYTES x RECORDS */              
  HEADER_TYPE                = FITS                                           
  INTERCHANGE_FORMAT         = ASCII                                          
  RECORDS                    = 1                                              
  DESCRIPTION                = "FITS extension header"                        
END_OBJECT                   = PULSE_HEIGHT_HEADER                            
                                                                              
                                                                              
OBJECT                       = PULSE_HEIGHT_TABLE                             
  INTERCHANGE_FORMAT         = BINARY                                         
  ROWS                       = 16                                             
  COLUMNS                    = 1                                              
  ROW_BYTES                  = 2                                              
  DESCRIPTION                = "                                              
    The pulse height distribution (PHD) is a one-dimensional                  
    histogram, that bins each of the detected events (pulses) based on        
    their 'amplitude'. Detected events are those that are larger than         
    the discriminator setting, which is an analog (voltage) value. Of         
    the 16 PHD bins, both the top and bottom 3 bins don't get any             
    events (this is caused by the digitization of this amplitude              
    information), so only 10 bins contain non-zero values. The                
    sampling parameter interval is effectively unknown and somewhat           
    arbitrary anyway since only the relative shape and stability of           
    the distribution is of interest."                                         
                                                                              
  OBJECT                     = COLUMN                                         
    NAME                     = "PULSE_HEIGHT_DISTRIBUTION"                    
    DATA_TYPE                = MSB_INTEGER /* 16-bit signed integers */       
    BYTES                    = 2                                              
    START_BYTE               = 1                                              
    OFFSET                   = 32768                                          
  END_OBJECT                 = COLUMN                                         
                                                                              
END_OBJECT                   = PULSE_HEIGHT_TABLE                             
                                                                              
                                                                              
OBJECT                       = COUNT_RATE_HEADER                              
  BYTES                      = 2880 /* RECORD_BYTES x RECORDS */              
  HEADER_TYPE                = FITS                                           
  INTERCHANGE_FORMAT         = ASCII                                          
  RECORDS                    = 1                                              
  DESCRIPTION                = "FITS extension header"                        
END_OBJECT                   = COUNT_RATE_HEADER                              
                                                                              
                                                                              
OBJECT                       = COUNT_RATE_SERIES                              
  INTERCHANGE_FORMAT         = BINARY                                         
  ROWS                       = 100 /* FITS NAXIS1 keyword */                  
  COLUMNS                    = 1                                              
  ROW_BYTES                  = 2                                              
  SAMPLING_PARAMETER_INTERVAL= 2.90000                                        
  SAMPLING_PARAMETER_NAME    = TIME                                           
  SAMPLING_PARAMETER_UNIT    = SECONDS                                        
  DESCRIPTION                = "                                              
    These count rate data are a vector that gives the measured count          
    rate from the observation. Data are in units of counts per time           
    hack interval"                                                            
                                                                              
  OBJECT                     = COLUMN                                         
    NAME                     = "COUNTS"                                       
    DATA_TYPE                = MSB_INTEGER                                    
    START_BYTE               = 1                                              
    BYTES                    = 2                                              
    OFFSET                   = 32768 /* FITS BZERO keyword */                 
   END_OBJECT                = COLUMN                                         
END_OBJECT                   = COUNT_RATE_SERIES                              
                                                                              
                                                                              
END