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The DISR team is one of the largest of the Huygens instrument teams. The members are based throughout the United States and Europe, with the largest contributing groups from the University of Arizona (Tucson, AZ), The Max Planck Institute (Lindau, Germany), and the Paris Observatory (Grenoble, France).

Below are descriptions and pictures of the team members.

US-based Team (*asterisk on those expected to be at ESOC Germany for encounter results):

Dr. Martin Tomasko- DISR Principal Investigator, Research Professor
* Marty has been responsible for the concept of the instrument, management of the hardware development, coordination with the European hardware teams, calibration of the flight instrument, and the activities of the DISR Science Team to analyze and publish the results of the experiment. He has provided overall leadership of all aspects of the DISR experiment at Titan including the vision and dedication to conceive and carry-out the DISR idea from concept development through laboratory calibration to mission data analysis, international team participant recruiting, winning the competitive NASA award for this unique mission, and leading a contractual effort with Lockheed-Martin Aerospace of Denver to build the DISR instrument which packed unprecedented and innovative optical science-detector instrumentation into the Huygens Probe. Additionally, as a Research Professor, he was responsible for the doctoral level education of many students, some of whom are listed below as major contributors, themselves, to the Cassini-Huygens effort.

Dr. Lyn Doose- DISR Deputy Principal Investigator and Co-Investigator: Head of Software Development, Senior Research Associate
Lyn has over 30 years of experience in understanding and modeling the radiative transfer of thermal energy in planetary atmospheres. He was responsible for developing the software modeling codes used to analyze the data obtained by the DISR sensors. He developed software to understand the behavior of the DISR instrument in Titan’s atmosphere including all the temperature, wavelength, and optical effects of the flight hardware. He also played a leading role in designing the concepts used in the flight software, working closely with Lockheed-Martin Aerospace of Denver to build the DISR instrument. Lyn analyzes data from the DISR spectrometers for the vertical distribution and optical properties of Titan’s haze aerosols.

Peter H. Smith—DISR Co-Investigator , Senior Research Scientist
* Peter has a MS degree in Optics from the UA Optical Sciences program, and played a key role in developing the concept for the DISR instrument. Without his contributions at the earliest stages of the DISR program the instrument would not be as capable as it is. Peter will concentrate on analyzing our side-looking imager data for evidence of
thin hydrocarbon hazes in the lower stratosphere. Peter has also conducted extensive Mars exploration and is today also the Principal Investigator for the Phoenix Mission to Mars, the single largest contract ever awarded to UA.

Laura Ellen Dafoe, Senior Staff Engineer
* Laura Ellen was the systems engineer at Lockheed-Martin Aerospace in Denver leading engineering coordination of the various subsystems of the DISR instrument and interface control of the German and French supplied detectors. Since Cassini-Huygens launch she has worked for UA part-time from her home in Denver providing important DISR data analysis and interpretation.

Dr. Steffi Engel, Associate Staff Scientist
Steffi has had a leading role in developing the software necessary to obtain the vertical distribution and optical properties of the haze aerosols on Titan from the DISR Visible and Infrared Spectrometers. She also played a critical role in the analysis of the calibration data from the visible spectrometer from the measurements taken in our calibration laboratory.

Dr. Erich Karkoschka, Senior Staff Scientist
* Erich has not had a fixed formal role in the DISR experiment team. However his interaction at critical times has resulted in many improvements in the DISR instrument. He is directly responsible for the successful operation of our hardware data compression system. He has developed and provided software capable of sharpening and otherwise improving our images. Finally, he has assembled the absorbing properties of methane gas for our analysis of the “relative humidity” in Titan’s atmosphere.

Michael Prout—Project Coordinator
Mike Prout is the business manager on the DISR program responsible for all contracts, financial reporting, and funding from NASA/JPL to UA as well as to the DISR subcontractors. He managed the DISR university hardware contract with our aerospace partner Lockheed-Martin Aerospace in Denver and worked closely with Lockheed-Martin as they built the DISR instrument. During DISR development he coordinated project management with the European Space Agency, as well as Aerospatiale, and Daimler Aerospace as they produced the Huygens Probe for the European Space Agency. He also managed the collaboration agreements with DISR Co-Investigator teams in Germany and France. In addition, he participated in the analysis of data from the Ultraviolet Photometer during cruise checkouts and will also participate in the analysis of the Ultraviolet Photometer system data from Titan.

Chuck See, Senior Staff Engineer
* Chuck has served as our key hardware engineer for the instrument since it was launched in 1997 and has taken the lead in analyzing and reducing the data from all sixteen in-flight checkouts since launch as well as developing the command sequences sent to the instrument for testing and tuning the performance of DISR on board the Huygens Probe. Together with Chuck Fellows and Bashar Rizk, he collected all the calibration measurements on the three versions of the DISR instrument that were produced, including the flight model now on board the Huygens Probe. He worked extensively with Aerospatiale and Daimler Aerospace as they produced the Huygens Probe for the European Space Agency. He has taken a leading role in providing the resources we need at the European Space Operations Center (ESOC) in Darmstadt Germany to analyze the data when it returns to Earth.

This page was contributed by Mike Prout.

German Team

Bjoern Grieger, scientist

Stefan Schroeder, scientist

Wojtek Markiewicz, scientist

Uwe Keller, co-investigator

Michael Kueppers, scientist


French Team

Athena Coustenis, co-investigator

Bernard Schmitt, co-investigator

Sylvain Doute, scientist

Bruno Bezard, co-investigator


The well-dispersed other members of the DISR Team

Jonathan Lunine; LPL interdisciplinary scientist

Larry Soderblom; Flagstaff, AZ (USGS) co-investigator

Bob West; JPL liason, co-investigator

...and our press liason, Lori Stiles