PDS_VERSION_ID      = PDS3                                                    
LABEL_REVISION_NOTE = "                                                       
  08 Dec 2003  S.A.McLaughlin: Creation                                       
  25 Jan 2004  S.A.McLaughlin  Resolved liens                                 
  "                                                                           
                                                                              
OBJECT     = INSTRUMENT_HOST                                                  
  INSTRUMENT_HOST_ID = "LO72"                                                 
                                                                              
  OBJECT     = INSTRUMENT_HOST_INFORMATION                                    
    INSTRUMENT_HOST_NAME = "LOWELL OBSERVATORY 72 INCH (1.83M) TELESCOPE"     
    INSTRUMENT_HOST_TYPE = "EARTH BASED"                                      
    INSTRUMENT_HOST_DESC = "                                                  
                                                                              
                                                                              
Instrument Host Overview                                                      
========================                                                      
                                                                              
  The Lowell Perkins 72-inch (1.83-m) telescope is one of the facilities      
  of the Lowell Observatory.  The telescope is located on Anderson Mesa,      
  near Flagstaff, Arizona.  The geodetic coordinates of the telescope are:    
                                                                              
      Lontitude : 111d 32' 09.28'' W (248d 27' 50.72'' E)                     
      Latitude  : +35d 05' 48.62''                                            
      Altitude  : 2200m                                                       
                                                                              
  Longitude and latitude are good to about +/- 0.2. The altitude is           
  good to about +/- 1 meter.                                                  
                                                                              
  The location and telescope specifications given here are reproduced from    
  the Lowell Observatory web site, http://www.lowell.edu.                     
                                                                              
                                                                              
Telescope Specifications                                                      
========================                                                      
                                                                              
  The 1.83-meter telescope is a classical Cassegrain reflector with           
  the properties listed below:                                                
                                                                              
      Primary Mirror Diameter             :  1.83m  (72.2in)                  
      Overall nominal f-ratio (F/#)       :  17.5                             
      Normal effective focal length (EFI) :  31.93m (1256.5in)                
      Normal Cassegrain scale             :  6.45 arcseconds/mm               
      BFI                                 :  1.30m (51.5in)                   
      Primary mirror f-ratio (Fp/#)       :  4.18                             
      Primary focal length (FLp)          :  7.635m (300.6in)                 
      Dsa                                 :  0.41m (16.3in)                   
      Is                                  :  7.22m (284.1in)                  
      Os                                  :  1.72m (68.0in)                   
      Ms                                  :  5.91m (232.6in)                  
      mag                                 :  4.2                              
      Primary conic constant (K1)         : -1.0 (paraboloid)                 
      Secondary conic constant (K2)       : -3.65 (hyperboloid)               
                                                                              
  Notes:                                                                      
                                                                              
   1) Dsa is the diameter of the axial cone at the secondary. The diameter    
      of the secondary is 1 to 2 inches larger than DSA.                      
  "                                                                           
                                                                              
  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