When the mission is in progress the telemetry window is shown. Four gauges at the top of the window show the battery charge level, number of GPS satellites visible, the quality of the downlink channel and state of connection to remote controller. These gauges will have a white, orange or red color depending on the charge or the quality of the signal.
Next line represents state of vehicle – Armed (all systems are activated and the vehicle is ready for flight) or Disarmed (all systems are deactivated and the vehicle is not ready for flight) and control - automatic flight mode or manual mode.
Altitude Raw - altitude data sent from the vehicle (without any additional interpretation). This value based on GPS and/or barometer data
Altitude AGL - shows current vehicle altitude above ground level. Accuracy of this value depends on the digital elevation model of the map for the particular region. The value is calculated thusly: Altitude AGL = Altitude AMSL - Elevation.
Altitude AMSL - shows the current altitude of the vehicle above mean sea level. This value is based on Raw altitude data. The value is calculated thusly: Altitude AMSL = Take-off point altitude + Raw altitude.
Vertical speed - indication of how fast a vehicle is ascending or descending. A positive value stand for increase of AMSL altitude, and negative for decrease.
Horizontal speed - horizontal component of the vehicle speed or Ground Speed.
Air speed - shows the speed of the vehicle through the air. This value is available only if vehicle is equipped with an airspeed sensor.
Elevation - AMSL of landscape under the current location of the vehicle. Depends on the digital elevation model for the region. Landscape elevation shown in meters above the mean sea level.
Latitude and longitude - current latitude and longitude (WGS-84 coordinates) of the vehicle, calculated according to GPS coordinates.
Distance to home – distance from vehicle to home position.
Four more elements, below the list of values, display the current attitude of the vehicle: pitch, roll, heading, course and angle to home location.
Note: In the heading indicator, direction to home location displayed as a red triangle with “H” within it. Above that, the angle to home location is displayed and if home location is not set, it displays “N/A”.
Downlink / Uplink – connection status.
Telemetry is recorded and values are saved to the database. Usually a vehicle reports its state multiple times per second. All reported data is saved to disk. The telemetry data can take up a large amount of available space.