HELiPOD in the snow drift in front of the "Polarstern". Some of the sensors are located directly in the air flow: at the top in front with the black inlet is a sensor for measuring the methane concentration, and below it is a much smaller sensor for measuring the carbon dioxide concentration. Other external sensors determine the air temperature and humidity, as well as the angle of inflow. Although the weather is too bad to fly, there is always something to test. Green plastic skis are mounted under the skids for transport on the ice. Photo credits: Falk Pätzold/Institute of Flight Guidance/TU Braunschweig

This image is part of: In the Arctic with a Helicopter Towed Probe. Please note the copyright of this image.