What the means that MAV_AS2 in the Mission Planner

Sorry, I would like to ask what does the “MAV_AS2” monitoring value in Mission Planner’s instrument information mean?
Does it refer to the reading of airspeed sensor 2?
If it is the reading of airspeed sensor 2, what is its unit? Because when I use the simulator to perform tasks, the numerical difference between ARSPD1 and ARSPD2 is very large, as shown in the picture.


Is this the Mission Planner integrated SITL?

That is indeed the second airspeed sensor. (Since no Mavlink support for it, it is sent via a named_float message, which is displayed as this)
If the value is different from the primary, then the sensor setup must be wrong or wrongly calibrated.

Yes
It is the Mission Planner integrated SITL

OK
thanks for your reply