How often it is recommended to calibrate a pixhawk based quadcopter (v2 firmware)?
We don't have recommendations like that, but if you want the best calibration take a look at the new thermal compensation. https://dev.px4.io/en/tutorials/sensor_thermal_calibration.html
Does anyone have the result of sensor thermal calibration for pixhawk?
What are you looking for? The link above has plots of gyro and accel data to give you an idea.