# MSG_QUAT_ORIEN_STD_DEV
该数据包用于描述：卡尔曼滤波P矩阵的四元数标准差
| Packet ID | 0x57 | ||||
|---|---|---|---|---|---|
| Length | 16 | ||||
| Read / Write | Read | ||||
| Offset | Size | Format | Field | Unit | Description |
| 0 | 4 | float32_t | Q0_standard_deviation | w | 四元数标准差 |
| 4 | 4 | float32_t | Q1_standard_deviation | x | 四元数标准差 |
| 8 | 4 | float32_t | Q2_standard_deviation | y | 四元数标准差 |
| 12 | 4 | float32_t | Q3_standard_deviation | z | 四元数标准差 |