Motion A Trimble 2000 GPS unit provides aircraft position and an accurate time.
Position is updated each second when a sufficient number of satellites are in contact.
Latitude, longitude, and altitude are recorded. The GPS position data are recorded with the T-28 data stream. The GPS time, groundspeed, and ground track angle are also recorded. The pressure transducers, two dynamic and two static, are all mounted in the rear fuselage. The two dynamic pressure transducers perform similarly.