ExoMars 2016 Schiaparelli Module Trajectory and Atmospheric Profiles Reconstruction

被引：17

作者：

Aboudan, A. ^{[1
]}

Colombatti, G. ^{[1
]}

Bettanini, C. ^{[1
]}

Ferri, F. ^{[1
]}

Lewis, S. ^{[2
]}

Van Hove, B. ^{[3
]}

Karatekin, O. ^{[3
]}

Debei, S. ^{[1
]}

机构：

[1] Univ Padua, CISAS Giuseppe Colombo, Via Venezia 15, I-35131 Padua, Italy

[2] Open Univ, Walton Hall,Kents Hill, Milton Keynes MK7 6AA, Bucks, England

[3] Royal Observ Belgium, Ringlaan 3, B-1180 Brussels, Belgium

来源：

SPACE SCIENCE REVIEWS | 2018年 / 214卷 / 05期

关键词：

Mars atmosphere; Entry probe; Data assimilation; SCIENCE LABORATORY ENTRY; MARS; DESCENT;

D O I：

10.1007/s11214-018-0532-3

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

On 19(th) October 2016 Schiaparelli module of the ExoMars 2016 mission flew through the Mars atmosphere. After successful entry and descent under parachute, the module failed the last part of the descent and crashed on the Mars surface. Nevertheless the data transmitted in real-time by Schiaparelli during the entry and descent, together with the entry state vector as initial condition, have been used to reconstruct both the trajectory and the profiles of atmospheric density, pressure and temperature along the traversed path. The available data-set is only a small sub-set of the whole data acquired by Schiaparelli, with a limited data rate (8 kbps) and a large gap during the entry because of the plasma blackout on the communications. This paper presents the work done by the AMELIA (Atmospheric Mars Entry and Landing Investigations and Analysis) team in the exploitation of the available inertial and radar data. First a reference trajectory is derived by direct integration of the inertial measurements and a strategy to overcome the entry data gap is proposed. First-order covariance analysis is used to estimate the uncertainties on all the derived parameters. Then a refined trajectory is computed incorporating the measurements provided by the on-board radar altimeter. The derived trajectory is consistent with the events reported in the telemetry and also with the impact point identified on the high-resolution images of the landing site. Finally, atmospheric profiles are computed tacking into account the aerodynamic properties of the module. Derived profiles result in good agreement with both atmospheric models and available remote sensing observations.

引用

页数：31

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