Déjà-vu App

Reconstruct observed flight path using Augmented-Reality

This app supports witness interview for flight accident investigation. The collected data can be used for accident investigation and accident report.
Further the gathered data can be used together with the other products by iwi® like Analyzer or Realism.
The app perfectly supports authorities and investigators to perform witness interview to collect information by using their iPhone or iPad.
The investigator can place the 3D object of a similar aircraft that was observed by the witness in Augmented-Reality. Several positions can be placed, as well the attitude of the aircraft set.

The position of the virtual aircraft is calculated by the app and shown as latitude, longitude and altitude above see-level. Finally the virtual observed flight can be animated. The time between the different positions can be set and the app also calculated the TrueAirspeed. The animation can be recorded with the screen recording that is available since IOS 11.

Select 3D Model:

Start the app and select the most similar looking 3D model.

Additional models will be added to the app in the future.

1) Click on one of the icons to choose a model. The active selected model is highlighted in green.
2) On the left side you can choose a colour, the model shall be painted with.
3) Now click on the upper right, on the red "x" to close the window.

Check app settings if necessary:

Click on the bottom on the settings icon to open the settings page.
Adjust settings as necessary.

1) Select your preferred dimension: meters or feet

2) Select your preferred airspeed unit: KTS or km/h

The settings will be saved and automatically reloaded when you start the app again.
To close the settings page, click on the red "x".

Set observed Object positions:

4) Adjust pitch and heading attitude of the model be touching the "target" symbol and move the finger upwards/downwards to adjust pitch. Move finger to the right/left to change heading to the right/left. The target symbol marks the center. As you move further away from the center, heading and pitch change faster.

If you want to reset the attitude values for the actual selected position back to zero, presse the "Reset Attit." button on the upper right.

1) Click on the "red circle" to place the model at the "target" area.

2) Move the grey slider on the right up to increase object distance, move down to reduce distance of the model. The actual distance is shown on the left info section, "Dist: 59.2m"
In case you want to reset the distance value, press "Reset Dist" on the upper right.

3) Adjust the roll angle of model by using the "Pinch Gesture". Increase distance between both fingers to roll the model to the right. Decrease distance to roll to the left.

Now click "Pos 2" on the left to place model at second position.
Later the path will be animated beginning from Pos1, Pos2 to Pos3.

Perform same steps as for Pos 1, setting position, distance and attitude values.

Select "Pos 3" to set the last position that was observed by the witness.

Set position, distance and attitude values.

Setup animation to replay observation to witness:

Now click on the animation button to change menu.

Before animating the defined positions, the animation time between the positions has to be set.

For "Pos 1" there is no time to be set, as the animation starts at 0.0 seconds.

Press on Pos 2 to set the animation time that shall be applied between Pos 1 and Pos 2.

Use the grey slider on the right. In Animation mode, the slider changes the time value, that is shown on the left, under the green "Pos 2" button, on the image left with 1.0s.
Move the slider down to reduce the time, move it up to increase the time.
The app calculates automatically the TrueAirSpeed, based on the set positions for Pos 1 and 2. The calculated airspeed is shown under the time, on the left image with 62 km/h.

Select Pos 3 to set the animation time between Pos 2 and 3.
Same process as before, adjust the time, on the left image shown with 1.4s and 62 km/h.

Now the path can be animated by pressing the "PAUSED" button on the upper left. When the animation is running, the button shows in green "PLAYING" and the actual animated time below.

When the animation is finished, it will automatically restart from the beginning again and loop. To stop the animation press "PlAYING" button.

When all settings are finalised and confirmed by the witness, you can press the IWI logo on the lower right.
This will hide some information and will automatically start the animation in loop modus.
You can record this animation by using the apple screen recording.
How to do, check next "step 05" below.

Data Export:

When you have configured an email account on your iPhone / iPad, you will have an icon available to export data.
The export will opens an email on your device with the calculated positions/attitude within the text.
Further the app creates automatically in the background screenshots when you place the aircraft location.
Those images are stored in your local photo library when you pressed the export button.
Please take a look in your photo library, in case you want to use them for your witness documentation report.

Record confirmed animation for documentation:

Since IOS 11 you can record a video of your iPhone/iPad screen.

Add Screen Recording to Control Center. Go to Settings > Control Center > Customize Controls, then tap next to Screen Recording.
Open Control Center from the bottom on your screen.
To capture sound during interview while you record, press deeply on and tap Microphone Audio.
Tap the record button , then wait for the three-second countdown.
To stop recording, open Control Center and tap . Or tap the red status bar at the top of your screen and tap Stop.

You can find your screen recording in the Photos app.

Additional information can be found at Apple support page.