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Tianwen-1 Mars entry vehicle trajectory and atmosphere reconstruction preliminary analysis

Tianwen-1 Mars entry vehicle trajectory and atmosphere reconstruction preliminary analysis The Tianwen-1 Mars entry vehicle successfully landed on the surface of Mars in southern Utopia Planitia on May 15, 2021, at 7:18 (UTC+8). To acquire valuable Martian flight data, a scientific instrumentation package consisting of a flush air data system and a multilayer temperature-sensing system was installed aboard the entry vehicle. A combined approach was applied in the entry, descent, and landing trajectory reconstruction using all available data obtained by the inertial measurement unit and the flush air data system. An aerodynamic database covering the entire flight regime was generated using computational fluid dynamics methods to assist in the reconstruction process. A preliminary analysis of the trajectory reconstruction result, along with the atmosphere reconstruction and aerodynamic performance, was conducted. The results show that the trajectory agrees closely with the nominal trajectory and the wind-relative attitude. Suspected wind occurred at the end of the trajectory.[graphic not available: see fulltext] http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Astrodynamics Springer Journals

Tianwen-1 Mars entry vehicle trajectory and atmosphere reconstruction preliminary analysis

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Publisher
Springer Journals
Copyright
Copyright © The Author(s) 2022
ISSN
2522-008X
eISSN
2522-0098
DOI
10.1007/s42064-021-0116-y
Publisher site
See Article on Publisher Site

Abstract

The Tianwen-1 Mars entry vehicle successfully landed on the surface of Mars in southern Utopia Planitia on May 15, 2021, at 7:18 (UTC+8). To acquire valuable Martian flight data, a scientific instrumentation package consisting of a flush air data system and a multilayer temperature-sensing system was installed aboard the entry vehicle. A combined approach was applied in the entry, descent, and landing trajectory reconstruction using all available data obtained by the inertial measurement unit and the flush air data system. An aerodynamic database covering the entire flight regime was generated using computational fluid dynamics methods to assist in the reconstruction process. A preliminary analysis of the trajectory reconstruction result, along with the atmosphere reconstruction and aerodynamic performance, was conducted. The results show that the trajectory agrees closely with the nominal trajectory and the wind-relative attitude. Suspected wind occurred at the end of the trajectory.[graphic not available: see fulltext]

Journal

AstrodynamicsSpringer Journals

Published: Mar 1, 2022

Keywords: Tianwen-1; flush air data system (FADS); trajectory reconstruction; Martian atmosphere; aerodynamics

References