Flight data are stored in Vesper's internal memory when the "Vehicle Flight Logging" parameter is enabled after the aircraft has been armed. The flight data log contains information about various aircraft conditions such as motor speed, battery details, and data from the flight controller, in addition to flight telemetry data. A subset of these data, specifically telemetry data are always sent to the Vision GCS which displays the position, altitude, and other parameters of the Vesper during its flight and is stored as a telemetry log (tlog) even if the "Vehicle Flight Logging" parameter was disabled.

The instructions below provide operators with instructions about extracting telemetry data files (tlogs) from a Vision GCS.

Note: Enabling Vehicle Flight logging is required for any drone incident warranty claims. Please refer to How to enable or disable Vesper Flight Data Logging for more information about enabling this feature.

Extract a Vesper telemetry log from Vision GCS

1. Turn the Vision GCS on
2. Log into the Vision GCS
3. Insert a USB Flash drive using a USB C to USB A converter into the USB C port on the bottom of the Vision GCS
4. Tap the top of the screen to minimize the QGC app and reveal the Ubuntu desktop
5. Look for the “Files” icon on the left side of the desktop
6. Tap the “Files” icon
7. Double-tap the “Documents” folder icon
8. Double-tap the “CustomQGC” folder icon
9. Double-tap the “Telemetry” folder icon
10. Select the log(s) related to the flight(s) in question. The telemetry logs (tlog) are named by year, month, day, and seconds. E.g. 2022-09-27_21.38.03.tlog
11. Long tap on the log(s) and select “Move to…” 
12. Select the USB Flash drive inserted in step #3 above by tapping the USB Flash drive icon at the bottom left side of the window
13. Tap the green “Select” button on the top right of the window
14. Remove the USB Flash drive from the GCS 

The flash drive can now be inserted into a computer where the tlog file(s) can be transferred for review or distributed via email.