airlogOne: the next generation tracker
Packed with features and technology, the airlogOne provides deep insight into all aspects of your jump:
automatic jump log, track flown, accurate altitude data and the truemove* fusion sensor for detailed acceleration values of all movements during the flight.
reflects software version V1.3
altitude display
Internally the airlogOne works with a high precision pressure sensor – its pressure measurements are converted to the displayed altitude using the “baromeric formula” according to the ICAO standard. The only difference to the ICAO rules is the fact that on ground is always the 0m position. This adjustment (measured pressure = 0m) is done automatically when the instrument is switched on and can be updated when the air pressure changes by means of the Alt0 key.
The GPS altitude is not displayed and is only stored additionally in the data tracks. GPS was not developed for altitude measurements. Also, the GPS altitude is always the altitude above the geoid (simplified: mean sea level) and therefore not null at ground, so it is not usable for skydivers.
navigate home
If you are in the air – and more than 200m away from the home position, the arrow (left of the altitude display) points to the direction you have to fly to get back home (= to the DZ). The distance in mi/km is displayed below the arrow.
Next to the arrow the (magnetic) north direction is displayed for general orientation. This compass display helps to take into account a previously announced wind direction for the landing approach.
track your dive
Internally the airlogOne works with a high precision pressure sensor, whose pressure measurements are converted to the displayed altitude using the “baromeric formula” according to the ICAO standard. The only difference to the ICAO rules is the fact that on the ground is always the 0m position. This adjustment (measured pressure = 0m) is done automatically when the instrument is switched on and can be updated when the air pressure changes by means of the Alt0 key.
The GPS altitude is not displayed and is only stored additionally in the data tracks. GPS was not developed for altitude measurements and shows the greatest inaccuracies there. Also, the GPS altitude is always the altitude above the geoid (simplified: mean sea level) and therefore not null on the ground, so it is not usable for skydivers directly.
Map mode
The map mode is still an experimental feature and must be enabled in the config backend. It is only available during decent and starts automatically at around 1000m altitude.
truemove fusion sensor
AHRS can be used in a variety of applications, including virtual reality, immersive gaming, sports and fitness, and robotics – you probably know it from your Playstation or Wii.
In aircraft navigation, it’s used to provide information about an aircraft’s attitude and heading (roll, pitch, yaw). The same is true for skydivers.
For an arm-worn tracker, truemove* is the technology that enables you to interpret the acceleration data received from the sensors – because you need to know the position and orientation of the sensor itself to transform all measurement data into "world coordinates".
If the tracker is attached to a fixed position (e.g. chest strap, mudflap), it can provide detailed information about the orientation (attitude) of the jumper. These can be correlated along with the other tracking parameters (speed, descent rate, etc) and provide information about the effects of in-flight position changes.
No device has been able to do this so far!
With airlogOne, the attitude data is stored as “quaternion”, a mathematical form that has significant advantages for further processing. It can be easily converted to the classic format of roll, pitch and yaw angles.
Our website check.airlog-one.com offers an online tool to view the quaternion data.
airborne
For this purpose, the device checks every minute whether it is gaining speed and altitude. If this condition is detected, the “flight phase” begins – you and the device are airborne.
At this point, an entry is made into the airlogOne’s internal logbook (also stored on the SD card), which includes the day, time, location and later the name of the track file. Also, your jump count will be incremented.
After transferring this information to the cloud dashboard, your jump log is completed – you only need to add data such as drop plane, fellow jumpers and comments. This logbook is available to you worldwide and at any time in the web browser.
operating modes
After power on, the airlogOne performs a self-test and starts in Alti/Tracker mode, recognisable by the screen as shown in the picture above.
Other modes are Wifi cloud access, power off/sleep and magnetometer calibration.
These modes are reached by pressing and holding the M button – after 3sec the display changes to the next mode – if released now, the mode is selected.
Detailed information about the different operating modes follow here.
.
config page
Timezone, units and action trigger altitudes can be quickly set here. Also the display orientation (chest or wrist) and output file format(native or FlyS) is set in the config page.
The airlogONE device config page is a short cut to the more detailed configuration page in the airlog.app dashboard. Changes on the device are mirrored to the online configuration once WiFi is enabled.
tracking modes
In compatibility mode, the data can be processed directly with existing evaluation structures and imported into the corresponding programs.
The sensor data from the accelerometers and the barometric altitude measurement are lost in this process (not defined in the FLSGHT foirmat)
Only the (native) CSV mode, which is used within the airlog.app software, provides access to this data.
Nevertheless, this data can be read and used directly by the user. In addition to the airlog.app tools, you can also use your own workflows to evaluate the data.
battery indicator
If the charge level reaches only 4 bars, a flashing charge symbol is displayed at the top left: charge if possible.
Before the battery is empty, the device changes to a "charge me" symbol and switches off.
To save energy, the device switches to "sleep mode" after 1 hour of non-use. Every 4 hours, the device wakes up and checks the battery status so that an estimate of the remaining charge can be made before switching on.
The display at the bottom right shows the sleep time in hours and the remaining battery charge in "bars" (f.i. 124-B06)
units and altimeter font
Please note that all data recorded in the track is always stored ISO standard-compliant in metric format.
The altitude is displayed on the screen using a proportional font in large digits.
If you do not like the changing spacing of the altitude information, you can change the font to a font with constant spacing (monospaced).
ground density altitude
This altitude directly influences the flight characteristics of the canopy and can help to increase safety:
While the altimeter on the ground displays "0", the ground density altitude indicates the altitude that corresponds to the current pressure and temperature situation.
It's a "feels like" altitude information, which indicates a possible loss of performance – especially with small canopies. With this information you can adapt your flying pattern accordingly.