# MSG_POS_STD_DEV
该数据包用于描述：卡尔曼滤波P矩阵的位置标准差
| Packet ID | 0x54 | ||||
|---|---|---|---|---|---|
| Length | 12 | ||||
| Read / Write | Read | ||||
| Offset | Size | Format | Field | Unit | Description |
| 0 | 4 | float32_t | Latitude_standard_deviation | rad | 纬度的标准差 |
| 4 | 4 | float32_t | Longitude_standard_deviation | rad | 经度的标准差 |
| 8 | 4 | float32_t | Height_standard_deviation | m | 高度的标准差 |