no particles: 131602905   0.0000 278.5000 414.6429        1     1981     1983   69.49    
  no particles: 131602905   0.0000 278.5000 414.6429        1     1981     1983   69.49    
  no particles: 131602905   0.0000 278.5000 414.6429        1     1981     1983   69.49    
  no particles: 131602905   0.0000 278.5000 414.6429        1     1981     1983   69.49