This is a schematic of the DHC-6 Twin Otter aircraft used in the data acquisition. Highlighted in gold at the end of each wing are the magnetometers. These are set out away from the aircraft due to their sensitivity to interference from electrical or magnetic materials in the wings.
Mounted under each wing, and shown in the sketch as gold lines on the top of the wings, are a series of dipole radar antennas - four on each wing. Flights were run with four under each wing, but the capability exists to mount up to three additional for a total of seven.
Inside the cab are several racks of equipment supporting the instruments as they collect the data. One piece of equipment is mounted inside the plane is a gravimeter.
A GPS receiver is mounted centrally on the roof of the plane's cab between the wings, with a second antenna mounted on the tail fin.
Mounted so that it can scan out the bottom of the plane is a Reigl laser scanner. The scanner measures ice surface elevation.
Fuel is stored in three separate compartments, a 240 liter tank on each wing tip, and a500 liter auxiliary tank behind the pilot area.