PX4 Generic Quadcopter · 2023-04-11 (0b1a)

Flight telemetry summary

Distance Meters

4.5 m

Maximum Altitude AGL

4.4 m

Maximum Ground Speed

1.07 m/s

Minimum Battery Percent

89.5%

Minimum Battery Voltage

15.47 V

Minimum GPS Satellites

16

Maximum GPS HDOP

1.31

Flight Modes

POSCTL

Maximum Distance From Home Meters

5.2 m

Maximum Distance From Home Time

42s

Average Ground Speed

1.04 m/s

Maximum Climb Rate MPS

1.54 m/s

Maximum Descent Rate MPS

-0.75 m/s

Battery Consumed MAH

59.5 mAh

Battery Consumed Wh

0.96 Wh

Voltage Sag

0.53 V

Flight Mode Seconds

POSCTL: 48s

Maximum GForce

1.53 g

EKF Healthy

Yes

Weather at the flight

Source

open-meteo-archive

Sampled At Utc

2023-04-11T22:00Z

Latitude

40.62

Longitude

-111.83

Temperature C

21.7 °C

Wind Speed MPS

6.84 m/s

Wind Direction Degrees

153

Wind Direction Cardinal

SSE

Weather Code

0

Weather Description

Clear

AI flight report

This was a very short and minor flight — 48 seconds total, with the drone staying within about 4-5 meters of home the whole time. It took off at 0:15, climbed to its maximum altitude of 4 m above home by 0:25, and touched back down by the end, disarming at 0:47. Ground speed stayed low throughout, peaking at just 1.1 m/s at 0:34, and average moving speed was 1.0 m/s. This has the look of a brief hover/test hop rather than a real cross-country flight. Conditions were breezy for such a small flight — 6.84 m/s wind from the SSE and 21.7°C, clear skies — though given the drone barely left the ground, wind doesn't appear to have caused any control problems.

The one real anomaly in this log is a large and sustained disagreement between the barometric and GPS-fused altitude estimates, flagged as a warning at 0:00 and peaking at 1404.6 m at 0:30. That's a huge gap for a flight that only ever climbed 4 m — one of the two altitude sources was clearly reporting badly wrong data, likely a barometer fault (e.g., a bad baro calibration, blocked sensor, or pressure reference issue) rather than a GPS problem, since GPS satellite count stayed healthy at 16-17 sats with HDOP around 1.1 the whole flight. The peak acceleration of 1.41 G at 0:03, right before takeoff, is unremarkable and likely just reflects motor spool-up.

Battery and GPS were both fine — battery only dropped from 98% to 90% (voltage sag of 0.53 V) and satellite count/HDOP stayed stable and good throughout, so neither explains the altitude discrepancy.

Given the size of that barometric-vs-fused gap, the main actionable item here is to check the barometer before trusting this vehicle's altitude readings on a longer flight: recalibrate or inspect the baro sensor (housing, static port, foam cover) and confirm on the next flight that barometric and fused altitude track closely from 0:00 rather than diverging again. Everything else about this flight — speed, battery, GPS lock — was well within normal margins and doesn't point to any other concern.

Detected flight events

1. 0s — Barometric and fused altitude disagree by 1404 m

   Barometric and fused altitude disagree by 1404 m

2. 15s — Takeoff (altitude threshold)

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

3. 25s — Maximum altitude: 4 m above home

   Maximum altitude: 4 m above home — the highest point of this flight.

4. 34s — Maximum ground speed: 1.1 m/s

   Maximum ground speed: 1.1 m/s — the fastest the aircraft moved over the ground.

5. 47s — Vehicle disarmed

   Motors disarmed — the flight is complete.