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# PpsCapture (UORB message)

**TOPICS:** pps_capture

## Fields

| 参数名                                | 类型       | Unit [Frame] | Range/Enum                                             | 描述                                                                             |
| ---------------------------------- | -------- | ---------------------------------------------------------------- | ------------------------------------------------------ | ------------------------------------------------------------------------------ |
| timestamp                          | `uint64` |                                                                  |                                                        | time since system start (microseconds) at PPS capture event |
| rtc_timestamp | `uint64` |                                                                  |                                                        | Corrected GPS UTC timestamp at PPS capture event                               |
| `uint8`                            |          |                                                                  | Increments when PPS dt < 50ms |                                                                                |

## Source Message

[Source file (GitHub)](https://github.com/PX4/PX4-Autopilot/blob/main/msg/PpsCapture.msg)

:::details
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```c
uint64 timestamp			  # time since system start (microseconds) at PPS capture event
uint64 rtc_timestamp		# Corrected GPS UTC timestamp at PPS capture event
uint8  pps_rate_exceeded_counter # Increments when PPS dt < 50ms
```

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