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• name: name of the BPM;
• s (curvilinear abscissa), position along the ring [m];
• i: index of the component corresponding to the element "name" in the 64-DBL array. Should index be equal "-1", that element must be ignored. This happens when:
  1. that BPM has been excluded (by a mask);
  2. there is no BPM connected to that channel. In that case "name" is "BPMDUMMY" and the curvilinear abscissa "s" is 0) 

[
   {
      "name":"BPBEL101",
      "s":2.531,
      "i":0
   },
   {
      "name":"BPBEL102",
      "s":6.205,
      "i":1
   },
   
   ...

   {
      "name":"BPBEL209",
      “s":96.228,
      "i":59
   }
]