The Characterisation of Titan's Atmospheric Physical Properties by the Huygens Atmospheric Structure Instrument (Hasi)

  title={The Characterisation of Titan's Atmospheric Physical Properties by the Huygens Atmospheric Structure Instrument (Hasi)},
  author={Marcello Fulchignoni and Fernando Ferri and Francesco Angrilli and Akiva Bar-Nun and M. A. Barucci and Gianandrea Bianchini and William J. Borucki and Marcello Coradini and Athena Coustenis and Peter Falkner and Enrico Flamini and Rejean J. L. Grard and Michel Hamelin and Ari-Matti Harri and Gilbert W. Leppelmeier and J{\'o}se Juan Lopez‐Moreno and John McDonnell and Christopher P. McKay and F. H. Neubauer and Arne Pedersen and Giovanni Picardi and Valerio Pirronello and R. Rodrigo and Konrad Schwingenschuh and Alvin Seiff and H{\aa}kan Svedhem and V. Vanzani and John C. Zarnecki},
  journal={Space Science Reviews},
The Huygens Atmospheric Structure Instrument (HASI) is a multi-sensor package which has been designed to measure the physical quantities characterising the atmosphere of Titan during the Huygens probe descent on Titan and at the surface. HASI sensors are devoted to the study of Titan's atmospheric structure and electric properties, and to provide information on its surface, whether solid or liquid. 
Huygens' measurements of the speed of sound on Titan
On 14th January 2005 the Huygens probe descended to Titan’s surface, measuring, amongst other properties, the speed of sound in the moon’s dense, haze filled atmosphere. These measurements were made
In situ measurements of the physical characteristics of Titan's environment
The temperature and density profiles, as determined by the Huygens Atmospheric Structure Instrument (HASI), from an altitude of 1,400 km down to the surface were higher than expected and the extent of atmospheric electricity was also hitherto unknown.
Electrical properties of ions in the atmosphere of Titan
The Permittivity, Wave and Altimetry (PWA) package on the Huygens probe measured atmospheric electrical activity during its 14 January 2005 descent into Titan's atmosphere. Electrical mobilities of
In-flight performance of the HASI servo accelerometer and implications for results at Titan
The Huygens Atmospheric Structure Instrument (HASI) includes a high sensitivity servo accelerometer to sense deceleration in the direction of the probe trajectory as it enters Titan's atmosphere in
Titan zonal wind corroboration via the huygens DISR solar zenith angle measurement
The in situ measurement of the vertical profile of Titan’s zonal wind is a major objective of the Huygens probe mission, as specifically addressed by the Doppler Wind Experiment (DWE). It now appears
Temperature variations in Titan's upper atmosphere: Impact on Cassini/Huygens
Temperature variations of Titan's upper atmosphere due to the plasma interaction of the satellite with Saturn's magnetosphere and Titan's high altitude monomer haze particles can imply an offset of


The atmosphere of Titan and the huygens atmospheric structure instrument
SummaryThe Huygens Atmospheric Structure Instrument (HASI) is a multisensor package which has been designed to measure the physical quantities characterizing the atmosphere of Titan. After a short
Huygens' Surface Science Package
The design and performance of the Surface Science Package (SSP) on the Huygens probe are discussed. This instrument consists of nine separate sensors that are designed to measure a wide range of
Surface of Titan revealed by Cassini/Huygens
Titan is Saturn's largest moon, and the second-largest natural satellite in the solar system. The surface is obscured from view by suspended haze layers, which are the products of methane
The thermal structure of Titan's atmosphere.
Titan's surface and troposphere, investigated with ground-based, near-infrared observations.
The Huygens Doppler Wind Experiment ' Titan Winds Derived from Probe Radio Frequency Measurements
A Doppler Wind Experiment (DWE) will be performed during the Titan atmospheric descent of the ESA Huygens Probe. The direction and strength of Titan's zonal winds will be determined with an accuracy
Titan's thermosphere profile