PDS_VERSION_ID                     = PDS3                                     
RECORD_TYPE                        = STREAM                                   
                                                                              
OBJECT                             = TEXT                                     
   PUBLICATION_DATE                = 2008-07-28  /* Label Generated */        
   NOTE                            = "Description of the contents of the      
        document directory."                                                  
END_OBJECT                         = TEXT                                     
END                                                                           
                                                                              
"document" Directory Contents                                                 
                                                                              
The document directory contains documentation files, where available, for the 
data set in this volume.  All document files will have an accompanying label  
file to describe content and structure.  Label files have the same name as the
main document file, with an extension of ".lbl".                              
                                                                              
docinfo.txt -  The file you are reading.                                      
                                                                              
ads.txt -  The file sent to Abstract Data Service (ADS).                      
                                                                              
ads.lbl -  The label for ads.txt.                                             
                                                                              
checksum.tab -  A table of checksums for all the data files.                  
                                                                              
checksum.lbl -  The label for checksum.tab.                                   
                                                                              
                                                                              
0graphics.asc -  "Description of Occultation Graphics", This document is a    
        description of the graphics images of the asteroid occultation        
        observations, supplied with this data set.  The graphics images       
        themselves are .jpg files with filenames which concatenate the        
        asteroid name, asteroid number or provisional designation, and        
        occultation date.                                                     
                                                                              
0graphics.lbl - The label file for the document "Description of Occultation   
        Graphics" described above.                                            
                                                                              
100hekate2004feb12.jpg 1021flammario2005apr11.jpg 1024hale2002feb26.jpg       
        1024hale2004mar23.jpg [836 more files not listed] - "Graphics of      
        Asteroid Occultation Observations", Graphics of Asteroid occultation  
        observations.                                                         
        March 2008.                                                           
                                                                              
        These plots of the occultation observations have a filename           
        convention concatenating the asteroid number, asteroid name           
        or provisional designation, and occultation date.                     
        The heading for each plot gives the following information:            
                                                                              
        Line 1                                                                
         Object identification, event date, ellipse size and orientation, and 
         associated uncertainties.                                            
                                                                              
        Line 2                                                                
         The offset of the shadow from the center of the earth, and associated
         uncertainty values.                                                  
                                                                              
        Line 3 [Only when a double star is involved.]                         
         The separation and Position angle of the components of the double    
        star,                                                                 
         with associated uncertainty.                                         
                                                                              
        Important. In all lines, an uncertainty value is only given if there  
        has been                                                              
        a meaningful calculation of the particular quantity. Where there is no
        uncertainty value, usually the particular value has been assumed.     
                                                                              
                                                                              
        The coding used in the plots is as follows:                           
                                                                              
        Event type                                                            
        * Disappearance events are plotted in Red.                            
        * Reappearance events are plotted in Green                            
        * Miss events are plotted in grey.                                    
        * For some events, the predicted central path is plotted.             
           This is drawn using a purple dashed line.                          
                                                                              
        Observing method                                                      
        * Events recorded visually are plotted with a '+'                     
        * Video/CCD observations are plotted with a small square.             
        * Miss events are plotted with a 'x'.                                 
                                                                              
        Plot style                                                            
        The plot is drawn in a manner that depends on the detail that is      
        derived                                                               
        from the observations.                                                
                                                                              
        * For the best-observed events, the observations are drawn without any
        best-fit ellipse, or joining pairs of observations. This better       
        enables the                                                           
        irregulaities in the asteroid profile to be visible.                  
                                                                              
        * For well-observed events, a best-fit ellipse is drawn through the   
        observations. The ellipse illustrates the shape of the asteroid.      
                                                                              
        * For poorly-observed events, a gray line joins the events of each    
        observer.                                                             
        That is, it shows the time during which the star was invisible to the 
        observer.                                                             
                                                                              
                                                                              
        Double stars.                                                         
        For a small number of events, a double star is involved. When this    
        occurs,                                                               
        the plot includes a representation of the double star, drawn on the   
        same                                                                  
        projected scale as the plot of the asteroid.                          
                                                                              
graphics_of_asteroid_occult.lbl - The label file for the document "Graphics of
        Asteroid Occultation Observations" described above.