Here is the recorded RDAS data for the flight.
I post-processed the recorded RDAS flight data using a Kalman filter. (See my NARAM 44 R&D report.) This filter combines the pressure and acceleration measurements along with a model of the rockets motion to produce an optimal (in a least squares sense) estimate of the rockets state.
The first plot shows the flight from just before liftoff till after apogee.
The next plot zooms in on the time around apogee..
Things get pretty busy after the AltAcc fires its drogue charge at ~13.4 seconds. This makes it a little tough to say when apogee would have been since the AltAcc was early. But by projecting the velocity trend forward, it looks like apogee would have occurred at about 14 seconds.