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docs/en/msg_docs/FollowTargetEstimator.md
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@@ -1,8 +1,33 @@
---
pageClass: is-wide-page
---
# FollowTargetEstimator (UORB message)
**TOPICS:** follow_targetestimator
## Fields
[source file](https://github.com/PX4/PX4-Autopilot/blob/main/msg/FollowTargetEstimator.msg)
| Name | Type | Unit [Frame] | Range/Enum | Description |
| --------------------------- | ------------ | ------------ | ---------- | ----------------------------------------------------------------------------------------------------------------------------------------- |
| timestamp | `uint64` | | | time since system start (microseconds) |
| last_filter_reset_timestamp | `uint64` | | | time of last filter reset (microseconds) |
| valid | `bool` | | | True if estimator states are okay to be used |
| stale | `bool` | | | True if estimator stopped receiving follow_target messages for some time. The estimate can still be valid, though it might be inaccurate. |
| lat_est | `float64` | | | Estimated target latitude |
| lon_est | `float64` | | | Estimated target longitude |
| alt_est | `float32` | | | Estimated target altitude |
| pos_est | `float32[3]` | | | Estimated target NED position (m) |
| vel_est | `float32[3]` | | | Estimated target NED velocity (m/s) |
| acc_est | `float32[3]` | | | Estimated target NED acceleration (m^2/s) |
| prediction_count | `uint64` | | |
| fusion_count | `uint64` | | |
## Source Message
[Source file (GitHub)](https://github.com/PX4/PX4-Autopilot/blob/main/msg/FollowTargetEstimator.msg)
::: details Click here to see original file
```c
uint64 timestamp # time since system start (microseconds)
@@ -21,5 +46,6 @@ float32[3] acc_est # Estimated target NED acceleration (m^2/s)
uint64 prediction_count
uint64 fusion_count
```
:::