GPS (GNSS/IMU), dual frequency geodectic GPS, GNSS receivers, Inertial Navigation Systems/Unit (INS), Inertial Measurement Unit (IMU)
most frequently used:
IGI AEROcontrol with AEROoffice processing software
Applanix POSAV with POSPAC processing software
NovAtel SPAN with GrafNav Inertial Explorer software
(including Waypoint / Novatel GrafNav GPS processing software)
