PDS_VERSION_ID               = PDS3                                           
                                                                              
RECORD_TYPE                  = "STREAM"                                       
                                                                              
^MOVIE                       = "HRIV_DUST_COMA.MPG"                           
                                                                              
DATA_SET_ID                  = "DI-C-HRIV/ITS/MRI-5-MOVIE-COLL-V1.0"          
PRODUCT_ID                   = "HRIV_DUST_COMA.MPG"                           
PRODUCT_NAME                 = "DI/HRIV DUST COMA EVOLUTION - MPEG MOVIE"     
PRODUCT_CREATION_TIME        = 2006-11-06                                     
                                                                              
TARGET_NAME                  = "9P/TEMPEL 1 (1867 G1)"                        
INSTRUMENT_HOST_NAME         = "DEEP IMPACT FLYBY SPACECRAFT"                 
INSTRUMENT_NAME = "DEEP IMPACT HIGH RESOLUTION INSTRUMENT - VISIBLE CCD"      
                                                                              
START_TIME = 2005-05-01                                                       
STOP_TIME  = 2005-07-04                                                       
                                                                              
SPACECRAFT_CLOCK_START_COUNT = "UNK"                                          
SPACECRAFT_CLOCK_STOP_COUNT  = "UNK"                                          
                                                                              
CITATION_DESC =                                                               
  "Farnham, T.L., DI/HRIV DUST COMA EVOLUTION - MPEG MOVIE,                   
   DI-C-HRIV/ITS/MRI-5-MOVIE-COLL-V1.0:HRIV_DUST_COMA.MPG,                    
   NASA Planetary Data System, 2006."                                         
                                                                              
OBJECT     = MOVIE                                                            
  NAME             = "DEEP IMPACT MOVIE: HRIV DUST COMA EVOLUTION"            
  DATA_FORMAT      = "MPEG-1"                                                 
  DESCRIPTION      = "Animated sequence of High Resolution Instrument         
    visibe CCD (HRIV) images showing the evolution of the dust coma of        
    comet Tempel 1 during the approach of the Deep Impact spacecraft.         
    The sequence starts on 1 May and extends to 4 July 2005.  Frame           
    intervals are typically four hours, though there are gaps whenever        
    spacecraft maneuvers or calibrations took precedence, and the sampling    
    frequency increases toward the end of the sequence.  Early images show    
    little variation, but as the spatial resolution improves, rotationally    
    varying jets and arcs can be detected.  At least ten outbursts of         
    various strengths can also be seen during the sequence.                   
                                                                              
    Each image has been enhanced by dividing out an azimuthally averaged      
    radial profile computed from the comet itself.  (The profile is           
    essentially a 1/rho profile, which steepens gradually within 300 km       
    of the nucleus.)  The circle at the center covers the PSF of the          
    nucleus, which appears donut-shaped because of the focus problems         
    in the HRI.  The six-pointed ''star'' pattern visible close to the        
    nucleus toward the end of the sequence is produced by diffraction         
    of the secondary mirror mount. The date and time of each frame are        
    shown in the upper right and the yellow marker that moves across the      
    bottom denotes the position of that image in the rotational phase         
    (where zero phase is defined as the time of impact, and the rotation      
    period is 1.7 days).  The field of view is about 23,000 km in the         
    first frame, 105 km in the last frame and varies roughly linearly         
    in between.  Celestial North is to the upper right, and East is to        
    the upper left.  For more information, see ''Dust coma morphology         
    in the Deep Impact images of Comet 9P/Tempel 1'' by Farnham,              
    et. al (2007)."                                                           
END_OBJECT = MOVIE                                                            
                                                                              
END