[
  [
    {
      "rotation" : {
        "1.5707963267948966" : {
          "indices" : [
            1,
            2,
            3
          ]
        }
      },
      "symmetry" : true,
      "mask" : {
        "radius_min" : 0.0,
        "radius_max" : "Infinity",
        "x_min" : 0.0,
        "x_max" : "Infinity",
        "y_min" : 0.0,
        "y_max" : "Infinity"
      }
    },
    {
      "step" : 0.1,
      "theta_step" : 0.39269908169872414,
      "cache" : { }
    }
  ]
]