Instrument Overview                                                     
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      The 'Near-Nucleus Studies Network' host is used to                      
      identify those observations submitted to the Near-Nucleus               
      Studies Network (NNSN) of the International Halley Watch                
      (IHW).  Data were submitted from a variety of ground-based              
      observatories.                                                          
                                                                              
      Details of the observing system used in each case may be                
      found in the individual data product labels.