code: def get(self, singleSnapshot=False):
          
          self.log.info('starting the ``get`` method')
  
          global xephemOE
          global tileSide
          global magLimit
  
          # GRAB PARAMETERS FROM SETTINGS FILE
          tileSide = float(self.settings["pyephem"]["atlas exposure match side"])
          magLimit = float(self.settings["pyephem"]["magnitude limit"])
  
          snapshotsRequired = 1
          while snapshotsRequired > 0:
              nextMjds, exposures, snapshotsRequired = self._get_exposures_requiring_pyephem_positions(
                  concurrentSnapshots=int(self.settings["pyephem"]["batch size"]))
              print "There are currently %(snapshotsRequired)s more pyephem snapshots required " % locals()
              if snapshotsRequired == 0:
                  return
  
              if len(xephemOE) == 0:
                  xephemOE = self._get_xephem_orbital_elements()
  
              # DEFINE AN INPUT ARRAY
              magLimit = self.settings["pyephem"]["magnitude limit"]
              pyephemDB = fmultiprocess(log=self.log, function=_generate_pyephem_snapshot, timeout=300,
                                        inputArray=nextMjds, magLimit=magLimit)
  
              matchedObjects = []
              for p, e, m in zip(pyephemDB, exposures, nextMjds):
                  matchedObjects.append(
                      self._match_pyephem_snapshot_to_atlas_exposures(p, e, m))
  
              self._add_matched_objects_to_database(matchedObjects)
              self._update_database_flag(exposures)
  
              if singleSnapshot:
                  snapshotsRequired = 0
  
          self.log.info('completed the ``get`` method')
          return None
docs: *geneate the pyephem positions*
  
          **Key Arguments:**
              -  ``singleSnapshot`` -- just extract positions for a single pyephem snapshot (used for unit testing)
  
          **Return:**
              - ``None``