Mission Control displays telemetry from your flight controller in real time. Data flows through the MAVLink or MSP protocol at up to 10 Hz and is stored in ring-buffered Zustand stores, keeping memory usage bounded even during long flights.
Telemetry Categories
Position
| Readout | Source | Description |
|---|
| Altitude (AGL) | GLOBAL_POSITION_INT / VFR_HUD | Meters above ground level |
| Speed | VFR_HUD / GLOBAL_POSITION_INT | Ground speed in km/h |
| Heading | VFR_HUD | Compass heading in degrees (0-360) |
| Climb Rate | VFR_HUD | Vertical speed in m/s |
| Latitude / Longitude | GLOBAL_POSITION_INT | GPS coordinates |
Power
| Readout | Source | Description |
|---|
| Battery Voltage | SYS_STATUS / BATTERY_STATUS | Total pack voltage |
| Battery Current | SYS_STATUS / BATTERY_STATUS | Current draw in amps |
| Battery Remaining | SYS_STATUS | Percentage remaining |
| Consumed mAh | BATTERY_STATUS | Cumulative current consumption |
| Power (Watts) | Calculated | Voltage times current |
| Estimated Flight Time | Calculated | Based on current draw and remaining capacity |
GPS
| Readout | Source | Description |
|---|
| Fix Type | GPS_RAW_INT | No Fix, 2D Fix, 3D Fix, DGPS, RTK Float, RTK Fixed |
| Satellites | GPS_RAW_INT | Number of visible satellites |
| HDOP | GPS_RAW_INT | Horizontal dilution of precision (lower is better) |
Attitude
| Readout | Source | Description |
|---|
| Roll | ATTITUDE | Bank angle in degrees |
| Pitch | ATTITUDE | Nose up/down angle in degrees |
| Yaw | ATTITUDE | Heading from IMU |
Radio Link
| Readout | Source | Description |
|---|
| RSSI | RADIO_STATUS | Local radio signal strength |
| Remote RSSI | RADIO_STATUS | Remote radio signal strength |
| Noise | RADIO_STATUS | Local noise floor |
| Remote Noise | RADIO_STATUS | Remote noise floor |
| RX Errors | RADIO_STATUS | Receive error count |
| TX Buffer | RADIO_STATUS | Transmit buffer usage |
EKF Status
The Extended Kalman Filter (EKF) estimates the drone’s position and velocity by fusing sensor data. Mission Control shows EKF health as colored bars:
| Metric | Meaning |
|---|
| Velocity Ratio | Quality of velocity estimates |
| Position Horizontal | Quality of horizontal position |
| Position Vertical | Quality of vertical position |
| Compass Ratio | Quality of compass heading |
| Terrain Ratio | Quality of terrain altitude estimate |
Vibration
| Readout | Source | Description |
|---|
| Vibe X | VIBRATION | X-axis vibration level (m/s/s) |
| Vibe Y | VIBRATION | Y-axis vibration level |
| Vibe Z | VIBRATION | Z-axis vibration level |
| Clipping | VIBRATION | Accelerometer clipping event counts |
High vibration values (above 30 m/s/s) indicate mechanical issues. Vibration affects EKF performance and can cause flyaways. Check motor balance, prop condition, and mounting before flying.
Telemetry Deck
The telemetry deck is a configurable panel that lets you choose which metrics to display and how they are organized. It supports four pages:
| Page | Focus |
|---|
| Flight | Altitude, speed, heading, climb rate, throttle |
| Link | RSSI, noise, errors, buffer |
| Power | Voltage, current, consumed, estimated flight time |
| Tuning | Roll/pitch/yaw rates, PID response, EKF, vibration |
Sensor Health Grid
The sensor health grid shows the status of all connected sensors:
- Gyro, Accelerometer, Magnetometer: Per-sensor health with individual status indicators
- Barometer: Altitude consistency check
- GPS: Fix quality and satellite count
- Optical Flow: If equipped, flow quality indicator
- Rangefinder: If equipped, altitude measurement status
Sensors that report errors or degraded performance are highlighted in yellow or red.
Alert Feed
The GCS generates alerts based on telemetry thresholds:
- Low battery warnings at configurable thresholds
- GPS degradation when satellite count drops or HDOP increases
- Failsafe triggers relayed from the flight controller
- Fence breach alerts when the drone crosses a geofence boundary
- EKF status changes from good to warning or error
- Radio link degradation based on RSSI thresholds
Freshness Indicators
Every telemetry value has a freshness check:
- Fresh: Data received within the last 10 seconds. Displayed normally.
- Stale: No update for 10-30 seconds. Values dim to indicate they may be outdated.
- Offline: No update for over 30 seconds. Values show a disconnected state.
This prevents you from trusting old data during connection interruptions.
Data Storage
Telemetry data is stored in ring buffers with fixed capacity. A 30-minute flight at 10 Hz produces about 18,000 samples per channel. Ring buffers automatically discard the oldest samples when full, keeping memory usage constant.
For long-term storage, use the History tab which records flight logs that can be replayed later. 
