PDS_VERSION_ID                = PDS3                                          
LABEL_REVISION_NOTE           = "                                             
  04 Nov 2002   E. Grayzeck,  Creation                                        
  18 Jul 2003   A.C.Raugh     Final lien-resolution editing                   
  "                                                                           
                                                                              
OBJECT     = INSTRUMENT_HOST                                                  
  INSTRUMENT_HOST_ID = "MCD27M"                                               
                                                                              
  OBJECT     = INSTRUMENT_HOST_INFORMATION                                    
    INSTRUMENT_HOST_NAME =                                                    
       "MCDONALD OBSERVATORY 2.7M HARLAN J. SMITH TELESCOPE"                  
    INSTRUMENT_HOST_TYPE = "EARTH BASED"                                      
    INSTRUMENT_HOST_DESC = "                                                  
                                                                              
      Instrument Host Overview                                                
      ========================                                                
                                                                              
      This is the  2.7m (107in) Harlan J. Smith Telescope of the              
      McDonald Observatory.                                                   
                                                                              
      Observatory                                                             
      -----------                                                             
      McDonald Observatory, located in the Davis Mountains of                 
      south central Texas, is run by the University of Texas                  
      at Austin.  As of this writing it is operating four                     
      optical telescopes.  The observatory is at longitude                    
      104:01.3 W and 30:40.3 N at an altitude of 2075 m.                      
                                                                              
                                                                              
      Telescope                                                               
      ---------                                                               
      The Harlan J. Smith Telescope has a primary mirror 107                  
      inches in diameter.  Three different foci are available,                
      each with its own instrumentation.  The following                       
      information is from the McDonald Observatory web site at:               
                                                                              
             http://www.as.utexas.edu/mcdonald                                
                                                                              
      It was current as of 26 Feb 2003.                                       
                                                                              
                                                                              
         Primary Mirror                                                       
            diameter        2.72 m                                            
            focal length   10.68 m                                            
            f-ratio         3.93                                              
                                                                              
         Cassegrain Ritchey-Chretien focus                                    
            focal length   23.91 m                                            
            f-ratio         8.8                                               
            field angle    61.5  arcmin                                       
            plate scale     8.62 arcsec/mm                                    
                                                                              
         Cassegrain focus                                                     
            focal length   47.98 m                                            
            f-ratio        17.7                                               
            field angle    31    arcmin                                       
            plate scale     4.29 arcsec/mm                                    
                                                                              
         Coude focus                                                          
            focal length   88.43 m                                            
            f-ratio        32.54                                              
            field angle     3    arcmin                                       
            plate scale     2.32 arcsec/mm                                    
      "                                                                       
  END_OBJECT = INSTRUMENT_HOST_INFORMATION                                    
                                                                              
  OBJECT     = INSTRUMENT_HOST_REFERENCE_INFO                                 
    REFERENCE_KEY_ID = "N/A"                                                  
  END_OBJECT = INSTRUMENT_HOST_REFERENCE_INFO                                 
                                                                              
END_OBJECT = INSTRUMENT_HOST                                                  
                                                                              
END