code: def get_hacr_channels(db=None, gps=None, connection=None,
                        **conectkwargs):
      
      # connect if needed
      if connection is None:
          if gps is None:
              gps = from_gps('now')
          if db is None:
              db = get_database_names(gps, gps)[0]
          connection = connect(db=db, **conectkwargs)
      # query
      out = query("select channel from job where monitorName = 'chacr'")
      return [r[0] for r in out]
docs: Return the names of all channels present in the given HACR database