HASI

The Huygens Atmospheric Structure Instrument (HASI) contains a suite of sensors that will measure the physical and electrical properties of Titan's atmosphere. Accelerometers will measure forces in all three axes as the probe descends through the atmosphere. With the aerodynamic properties of the probe already known, it will be possible to determine the density of Titan's atmosphere and to detect wind gusts. In the event of a landing on a liquid surface, the probe motion due to waves will also be measurable. Temperature and pressure sensors will also measure the thermal properties of the atmosphere.