{
  "frames": [
    {
      "requested_t": -0.5,
      "actual_t": -0.5
    },
    {
      "requested_t": 0,
      "actual_t": 0.0
    },
    {
      "requested_t": 0.25,
      "actual_t": 0.25
    },
    {
      "requested_t": 0.5,
      "actual_t": 0.5
    },
    {
      "requested_t": 0.75,
      "actual_t": 0.75
    },
    {
      "requested_t": 1,
      "actual_t": 1.0
    },
    {
      "requested_t": 1.25,
      "actual_t": 1.25
    },
    {
      "requested_t": 1.5,
      "actual_t": 1.5
    },
    {
      "requested_t": 2,
      "actual_t": 2.0
    },
    {
      "requested_t": 2.5,
      "actual_t": 2.5
    },
    {
      "requested_t": 3,
      "actual_t": 3.0
    },
    {
      "requested_t": 3.5,
      "actual_t": 3.5
    }
  ],
  "purpose": "0013核对前车身份变化；0014核对退出后绕行和道路中心线。",
  "note": "观察几何关系，不进行无标定的车身轮迹测量。"
}