PDS_VERSION_ID      = PDS3                                                    
LABEL_REVISION_NOTE = "                                                       
  2006-08-17   A.C.Raugh    Cleaned up for delivery - origin unknown          
  "                                                                           
                                                                              
OBJECT     = INSTRUMENT                                                       
  INSTRUMENT_HOST_ID = "GEMGB"                                                
  INSTRUMENT_ID      = "CCD"                                                  
                                                                              
  OBJECT     = INSTRUMENT_INFORMATION                                         
    INSTRUMENT_NAME = "GROUND-BASED CCDS"                                     
    INSTRUMENT_TYPE = "CCD"                                                   
    INSTRUMENT_DESC =                                                         
      "                                                                       
      Instrument Overview                                                     
      ===================                                                     
      Charge Coupled Device (CCD) cameras from AAT, Calor Alto, and           
      ESO Observatory were used by four groups of scientists                  
      on a variety of telescopes using selected chips shown below.            
                                                                              
      SCIENTIFIC OBJECTIVES                                                   
      ========================                                                
      To gather images of comet Grigg-Skjellerup in support of GEM.    The    
      images from Calor Alto were used primarily for astrometric positions    
      and the observing program is described in Birkle and Boehnhardt (1993). 
      The data from ESO was primarily to study the comet near the encounter   
      time on July 10, 1992 (Jockers, K. et al. (1993),Fulle, M. et al.       
      (1993)). Narrow-band mages collected from the AAT were intended to      
      study the emissions from H2O+ (Jones, G. et al. 1996).                  
                                                                              
      INSTRUMENT SECTION:                                                     
      ===================                                                     
      Obs/Tel/foc Cam No.  Det ID   Pix siz   UV Coat    Size  Mode RON  Sen  
                                                                              
      AAT/3.9m/CASS        THX       19       yes    1024,1024   f  3.4       
      CA/3.5m/Prime   3    TEK#7     24              1024,1024      2    3.9  
      CA/3.5m/Prime   3    GEC#13    22.5            1155,763       3    2.8  
      CA/3.5m/RC      9    RCA#11    15               328,512                 
      CA/2.2m/RC      7    GEC#13    22.5            1155,763       3.3  2.9  
      CA/1.2m/RC                                      410,580                 
      ESO/2.2m/EFOSC2 19   THX31156  19        yes   1024,1024   s  3.3  2    
                                                                 f  4.5  1.7  
      ESO/3.6m/EFOSC1 26   TEK       27               512,512       8         
                                                                              
      Mode is identified as Fast (where f = 50 kpix/sec) and Slow (where s =  
      20 kpix/sec), RON is measured in e- rms, and Sensiviity is given as     
      e-/ADU                                                                  
                                                                              
      Filters                                                                 
      =======                                                                 
      Filterlist for CCD-Observations                                         
                                                                              
      T.   = Transmission [%]     Bl.  = Blocking [nm]                        
      Th.  = Thickness [mm]       D.   = Diameter [mm]                        
      Tel. = Telescope            Off. = Focus-Offset (CAFOS)                 
                                                                              
      Lambda, FWHM in [nm]                                                    
                                                                              
                                                                              
       ID      Name       Lambda FWHM  T. Bl. Th. D.O/Tel   Remarks           
                                                                              
      616      6164/13    616.4  13                 A/3.9                     
      620      6202/10    620.2  10                 A/3.9                     
      493/54   Gunn g     492.5  54    74 1150 8 50 C/1.2 Interference        
      534/97a  Johnson V  534    97       1200 3 50 C/3.5 BG18/1+VG4/1+GG495/1
      538/98   Roeser V   537.5  98    96 1200 3 50 C/3.5 BG39/2 + GG495/1    
      641/158  Johnson R  641.2  157.5 74 1200 3 50 C/2.2 1041                
      654/199  Roeser R1  654.1  199.2 89 1200 3 50 C/3.5 OG570/1 + KG1/2     
      584      Bessel V   547.6  113.2 87           E/2.2                     
      585      Bessel R   643.1  165.4 86           E/2.2                     
      694                 694    79                 E/3.6                     
                                                                              
                                                                              
      Specifications for the filters can be found in operating manuals for the
      various observatories listed in the references below.                   
                                                                              
      References                                                              
        AAT Operating Manual as posted on the World Wide Web                  
          for the Observatory                                                 
        CAHA Operating Manual as posted on the World Wide Web                 
          for the Observatory                                                 
        ESO Operating Manual as posted on the World Wide Web                  
          for the Observatory                                                 
      "                                                                       
  END_OBJECT = INSTRUMENT_INFORMATION                                         
                                                                              
  OBJECT     = INSTRUMENT_REFERENCE_INFO                                      
    REFERENCE_KEY_ID = "N/A"                                                  
  END_OBJECT = INSTRUMENT_REFERENCE_INFO                                      
                                                                              
END_OBJECT = INSTRUMENT                                                       
END