How to log the synthetic airspeed data?

ArduPlane Plane 4.0
1

Hi there!
I flew my plane with the parameter ARSPD_TYPE=0 and checked through the telemetory that the synthetic airspeed estimation works well.
But after the flight I found no airspeed data is logged.
I want to analyze my flight log with airspeed.
Does anyone teach me how to log the synthetic airspeed data?

2

In your logs, look under CTUN, you should have a an Aspd field. That will have the airspeed estimate if airspeed type = 0 or if your air speed sensor is unhealthy.

3

Thnak you IAMMATT,
I missed to check CTUN.
By the way could you teach me what CTUN abbreviation stands for?

4

Thank you IAMMATT,
Could you teach me what the CTUN arreviation stands for?

5

CTUN (Control, Throttle and altitude information)
https://ardupilot.org/copter/docs/common-downloading-and-analyzing-data-logs-in-mission-planner.html