Results 301 to 310 of about 642,165 (350)

Two-Phase Zero-Effort-Miss/Zero-Effort-Velocity Guidance for Mars Landing

, 2021
This paper presents a new two-phase zero-effort-miss/zero-effort-velocity (ZEM/ZEV) feedback guidance strategy for Mars precision landing, which directly accommodates a variety of constraints and r...
Pengyu Wang, Yanning Guo, G. Ma, B. Wie
semanticscholar   +1 more source

Stability analysis of Mars soft landing under uncertain landing conditions and two landing strategies

Aircraft Engineering and Aerospace Technology, 2022
Purpose The purpose of this paper is to study the landing performance of the Mars lander considering uncertain landing conditions under two landing modes.
Jianzhong Ding, Xueao Liu, Yang Dong, Chunjie Wang   +3 more
semanticscholar   +1 more source

Geological Characteristics and Targets of High Scientific Interest in the Zhurong Landing Region on Mars

Geophysical Research Letters, 2021
We used imaging, laser altimeter and thermal infrared data to map a 0.5 by 0.5° area containing the landing site of the Zhurong rover of the Tianwen‐1 mission.
Jiannan Zhao, Zijun Xiao, Jun Huang, J. Head, Jiang Wang, Yutong Shi, Bo Wu, Le Wang   +7 more
semanticscholar   +1 more source

Thermophysical Properties and Surface Heterogeneity of Landing Sites on Mars From Overlapping Thermal Emission Imaging System (THEMIS) Observations

Journal of Geophysical Research: Planets, 2021
Orbitally derived thermal inertia (TI) values of surfaces allow for remote interpretation of rock and sediment physical characteristics. The evolving local times of the Mars Odyssey Thermal Emission Imaging System (THEMIS) mission have enabled surface ...
A. Ahern, A. D. Rogers, C. Edwards, S. Piqueux   +3 more
semanticscholar   +1 more source

Landing a Spacecraft on Mars [PDF]

IEEE Software, 2013
How much software does it take to land a spacecraft safely on Mars, and how do you make all that code reliable? This column describes such a software development process. The first Web extra at http://mars.jpl.nasa.gov/multimedia/videos/movies/miam20121218/miam20121218-1280.mov is a 60-second video from NASA's Jet Propulsion Laboratory that shows how ...
openaire   +1 more source

Autonomous Safe Landing Site Detection for a Future Mars Science Helicopter

IEEE Aerospace Conference, 2021
Future Mars Rotorcrafts require advanced navigation capabilities to enable all terrain access for science investigations with long distance flights that are executed fully autonomously.
R. Brockers, J. Delaune, Pedro F. Proença, Pascal Schoppmann, Matthias Domnik, Gerik Kubiak, T. Tzanetos   +6 more
semanticscholar   +1 more source

Real-time Terrain Relative Navigation Test Results from a Relevant Environment for Mars Landing

, 2015
Terrain Relative Navigation (TRN) is an on-board GN&C function that generates a position estimate of a spacecraft relative to a map of a planetary surface. When coupled with a divert, the position estimate enables access to more challenging landing sites
Andrew E. Johnson, Yang Cheng, J. Montgomery, N. Trawny, B. Tweddle, J. Zheng   +5 more
semanticscholar   +1 more source

Error analysis for a Mars landing

Astrodynamics Conference, 1988
This paper presents the methodology and preliminary results of a Mars landing error study. Aeromaneuvering was used to reduce the effects of errors. The guidance and navigation techniques used were based on those used for the Space Shuttle. A simulation was built to determine the performance of these techniques in a realistic Mars landing scenario. The
W. M. Mceneaney, K. D. Mease
openaire   +2 more sources

A new method for landing on Mars

Acta Astronautica, 2002
Abstract Up to now, the only means to land payloads on Mars have involved a heavy, complicated, expensive retro-rocket landing system. Another method to land payloads is to use a novel solar heated hot-air balloon, or Solar Montgolfiere, which looks promising to replace the retro-rocket landing system, while increasing usable landed payload.
Jack A. Jones, Jacques Blamont
openaire   +2 more sources

Overview of a Generalized Numerical Predictor-Corrector Targeting Guidance with Application to Human-Scale Mars Entry, Descent, and Landing

AIAA Scitech 2020 Forum, 2020
Recent advances in planetary entry guidance algorithms are motived by precision landing criteria for human-scale Mars missions and improved in-space computing capabilities.
R. Lugo, R. Powell, A. Dwyer-Cianciolo
semanticscholar   +1 more source