For [Pinion, Bevel&Sun, Planets, Ring] gear shaft respectively, we have
Nppr = [700, 2500, 4095, 11583];
Navg = [71, 19*2, 99, 35]*12;

So, Navg_hunting = 12 hunting tooth periods (one hunting tooth period is 99 revolutions of planet gears or 35 revs of the planet carrier) 
and data length in SSA_Hunting is 11583*35 = 4095*99 = 405405 sample points.
Each channel is in one cell, i.e. xah{1} is IP-1 sensor, xah{2} is RF-2, xah{3} is RL-3 and xah{4} is RR-4 sensor.

To further produce SSA_Planet, reshape SSA_Hunting to 4095 x 99 and average along the 99 columns.
To further produce SSA_Carrier, reshape SSA_Hunting to 11583 x 35 and average along the 35 columns.

The last file "Input_Average_Speed_Torque" captures the mean input shaft speed and torque over the 100-sec data acquisition period for 
each data file (526 data files in total).