{
  "id": "empty",
  "name": "不相容观测",
  "source": "synthetic",
  "target": null,
  "measurements": [
    {
      "x": -100,
      "y": 0,
      "bearing_deg": 180,
      "half_angle_deg": 1.0
    },
    {
      "x": 100,
      "y": 0,
      "bearing_deg": 0,
      "half_angle_deg": 1.0
    }
  ]
}