A simulated dataset of the Huygens mission

Details A simulated dataset of the Huygens mission A simulated dataset of the Huygens mission

Feb 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004esasp.544..343p&link_type=abstract

In: Proceedings of the International Workshop Planetary Probe Atmospheric Entry and Descent Trajectory Analysis and Science, 6-9

Physics

2

Titan, Entry Probes, Huygens Mission

Scientific paper

Huygens is the ESA-provided element of the joint NASA/ESA/ASI Cassini/Huygens mission to Saturn and its largest moon Titan. The spacecraft, launched on 15 October 1997, will enter in orbit around Saturn on 1 July 2004. Probe separation from the orbiter is planned on the 25 December 2004. After a 3-week coast phase, the Huygens probe will dive into the dense atmosphere of Titan on 14 January 2005 and will land on the surface after a nominal descent of about 2 hours 15 minutes. The probe is delivered to the interface altitude of 1270 km above the surface by NASA/JPL. The propagation of the trajectory from that point onwards is ESA's responsibility. An important effort is devoted to the development of an algorithm that aims at reconstructing the descent trajectory and attitude of Huygens from the scientific instruments and probe sensors measurements. In order to test this algorithm, a simulated synthetic mission dataset is being prepared. In this paper we describe the philosophy of our approach for preparing a Huygens simulated data set, the assumptions made and the limitations of the method. We report how these models are used to obtain the most realistic Huygens simulated synthetic dataset. The different parameters are described, with a special attention to the way the acceleration is generated. The different tools used for producing the simulated data set are described. They are based on those used for trajectory and probe attitude prediction: a 3 Degree-of-Freedom (DoF) entry and desent trajectory calculation, a 6 DoF entry simulator, and a 12 DoF probe-parachute-tethered tool.

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