[P-CG18] Future missions and instrumentation for space and planetary science

[PCG18-02] Development status of the seismic observation system onboard the Titan landing mission DragonFly

*Satoshi Tanaka¹, Hiroaki Shiraishi¹, Takefumi Mitani¹, Taichi Kawamura², Hideki Murakami³, Ryuhei Yamada⁶, Shun-ichi Kamata⁷, Jun Kimura⁵, Hiroyuki Kurokawa⁹, Kiwamu Nishida⁴, Yasuhito Sekine⁹, Takeshi Tsuji⁴, Keisuke Onodera⁴, Ralph Lorenz⁸ (1.Institute of Space and Astronautical Science, 2.Institut de Physique du Globe de Paris , 3.Kochi University, 4.University of Tokyo, 5.Osaka University, 6.University of Aizu, 7.Hokkaido University, 8.Johns Hopkins University, 9.Tokyo Institute of Technology)

Keywords:seismic observation, DragonFly mission, Titan

The Saturn satellite Titan takeoff and landing mission "Dragonfly" is a medium-scale mission selected as the fourth mission of NASA's New Frontiers Program in 2019. Dragonfly is scheduled to launch in 2027 and deploy a drone-like takeoff and landing vehicle on Titan around 2034 to conduct chemical analysis, meteorological and geophysical observations at multiple landing sites to investigate the precursors of life and evolutionary processes.
In July 2022, a plan to equip this mission with a seismometer developed by ISAS for lunar exploration was approved as a strategic overseas joint project, and full-scale development has started.
The Japanese side will be responsible for the seismometer, preamplifier, and windshield cover, which constitute the main part of the package (DraGMet SEIS) for observing seismic motions. The seismometer was initially developed for operation at -20°C in the lunar surface layer and will be modified to develop a seismometer that can operate in the Titan surface environment (1.5 atm, -180°C). For this purpose, we have developed a chamber that can be tested in an environment that simulates Titan's surface environment, and the operation of the seismometer and preamplifier has been confirmed.
As of February 2023 we had completed manufacturing of the EM (Engineered Model) and had begun testing for delivery to the U.S. After completing testing using the EM model by the middle of this year, FM manufacturing will begin, with flight model delivers scheduled for March 2024.
This presentation will report on the latest development and review process status.