PX4 UAVRT X500 · 2023-03-14

Flight telemetry summary

Distance Meters

0 m

Maximum Altitude AGL

122.4 m

Maximum Ground Speed

0.27 m/s

Minimum Battery Percent

41.7%

Minimum Battery Voltage

14.37 V

Minimum GPS Satellites

17

Maximum GPS HDOP

0.68

Flight Modes

AUTO_PRECLAND, AUTO_LOITER, POSCTL, AUTO_RTL, POSCTL

Maximum Distance From Home Meters

0.5 m

Maximum Distance From Home Time

1m 5s

Average Ground Speed

0 m/s

Maximum Climb Rate MPS

3.05 m/s

Maximum Descent Rate MPS

-1.94 m/s

Battery Consumed MAH

2349.7 mAh

Battery Consumed Wh

36.18 Wh

Voltage Sag

2 V

Flight Mode Seconds

AUTO_PRECLAND: 54s, AUTO_LOITER: 9s, POSCTL: 2m 12s, AUTO_RTL: 1m 43s

Maximum GForce

6.16 g

EKF Healthy

No

Weather at the flight

Source

open-meteo-archive

Sampled At Utc

2023-03-14T19:00Z

Latitude

47.66

Longitude

-122.11

Temperature C

8.3 °C

Wind Speed MPS

1.28 m/s

Wind Direction Degrees

219

Wind Direction Cardinal

SW

Weather Code

3

Weather Description

Overcast

AI flight report

This flight lasted 4:57 and, despite being logged on a fixed-wing airframe, shows essentially no horizontal travel — track distance and farthest-point-from-home both read 0 m, and max ground speed never exceeded 0.3 m/s. The altitude profile, by contrast, is a normal-looking climb and descent: the vehicle rose from 0 m at 0:00 to 122 m above home by around 1:00-1:33 (flagged as MAX_ALTITUDE at 1:33), held there through a long POSCTL segment from roughly 1:02 to 3:13, then descended steadily during AUTO_RTL, crossing 99 m by 3:30 and reaching about -0.8 m (essentially ground level, likely just sensor/threshold noise) by 4:45 before disarming at 4:56. Weather was mild and calm — 8.3°C, wind only 1.28 m/s from the southwest, overcast skies — so weather is not a likely factor in anything unusual here. GPS was solid throughout, never dropping below 17 satellites with HDOP no worse than 0.68.

The clearest anomaly shows up right at the start: an ALTITUDE_DISAGREEMENT warning at 0:00 noting a 30 m gap between barometric and fused altitude, and the derived diagnostics show this gap grew to a peak of 40 m at 3:23 — right in the middle of the RTL descent. Two EKF_UNHEALTHY critical faults followed, at 3:31 and 4:36, both landing inside or just after that same descent window. Given the combination of zero horizontal motion, a large and growing baro/fused split, and EKF faults during descent, the likeliest explanation is a positioning or sensor-fusion problem rather than an actual stationary flight — this may be a static bench/simulation-style log, a GPS-denied test, or a vehicle that never released horizontally while the barometer and fused estimator disagreed. The data doesn't tell us which, and that's the real gap: nothing here confirms whether the drone was physically airborne and drifting, or sitting fixed while telemetry updated.

Two things are worth checking against raw logs before trusting this replay at face value. First, resolve the baro-vs-fused altitude disagreement — it was already present at 0:00 and widened to 40 m by 3:23, right where both EKF faults cluster, suggesting the estimator was struggling through most of the descent. Second, confirm whether the near-zero ground speed and 0 m track distance are real (e.g., a tethered or in-place test) or a GPS/logging artifact, since every distance and speed statistic in this summary depends on that being correct.

Detected flight events

1. 0s — Barometric and fused altitude disagree by 30 m

   Barometric and fused altitude disagree by 30 m

2. 6s — Takeoff (altitude threshold)

   Liftoff at 2 m. The aircraft leaves the ground and starts its climb.

3. 54s — Flight mode changed to AUTO_LOITER

   Flight mode changed to AUTO_LOITER. The pilot or autopilot switched control behavior here.

4. 1m 2s — Flight mode changed to POSCTL

   Flight mode changed to POSCTL. The pilot or autopilot switched control behavior here.

5. 1m 33s — Maximum altitude: 122 m above home

   Maximum altitude: 122 m above home — the highest point of this flight.

6. 3m 13s — Flight mode changed to AUTO_RTL

   Flight mode changed to AUTO_RTL. The pilot or autopilot switched control behavior here.

7. 3m 31s — EKF filter fault or high innovation variance

   EKF filter fault or high innovation variance

8. 4m 36s — EKF filter fault or high innovation variance

   EKF filter fault or high innovation variance

9. 4m 56s — Vehicle disarmed

   Motors disarmed — the flight is complete.

10. 4m 56s — Flight mode changed to POSCTL

    Flight mode changed to POSCTL. The pilot or autopilot switched control behavior here.