Results 11 to 20 of about 1,504 (195)

Ground calibration of the Mars orbiter magnetometer onboard Tianwen-1

Earth and Planetary Physics, 2023
Ground calibration experiments of the Mars orbiter magnetometer (MOMAG) onboard the orbiter of Tianwen-1 were performed to determine the sensitivity, misalignment angle, and offset of the sensors.
ManMing Chen, Kai Liu, XiaoWen Hu, YiRen Li, XinJun Hao, ZongHao Pan   +5 more
doaj   +2 more sources

Analysis of the background signal in Tianwen-1 MINPA

Advances in Space Research
Since November 2021, Tianwen-1 started its scientific instrument Mars Ion and Neutral Particle Analyzer (MINPA) to detect the particles in the Martian space. To evaluate the reliability of the plasma parameters from the MINPA measurements, in this study,
Kong, Linggao, Li, Lei, Li, Wenya, Ma, Jijie, Miao, Bin, Qiao, Fuhao, Shen, Chenglong, Tang, Binbin, Wang, Limin, Wang, Yuming, Wang, Ziyang, Zhang, Aibing   +11 more
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Parallel observations process of Tianwen-1 orbit determination

Open Astronomy
To meet various requirements of the future deep space missions of China, State Key Laboratory of Astronautic Dynamics constructs a new orbit determinatin software with parallel observations process.
Huyan Zongbo, Zhang Dapeng, Ma Pengbin, Li Hengnian, Min Zhai   +4 more
doaj   +2 more sources

Mars Gravity Field Determination Using Tianwen-1 Orbiter Tracking Data

The Astrophysical Journal Letters
The Martian gravity field is a key data set for studying the internal structure of Mars. For this purpose, we processed all the two-way Doppler tracking data of the Tianwen-1 orbiter from 2021 June to 2024 October and determined a new degree and order 80
Chongyang Wang, Jianguo Yan, Shanhong Liu, Shangbiao Sun, Jianfeng Cao, Denggao Qiu, Xie Li, Jean-Pierre Barriot   +7 more
doaj   +2 more sources

Adaptive entry guidance for the Tianwen-1 mission [PDF]

Astrodynamics, 2022
AbstractTo meet the requirements of the Tianwen-1 mission, adaptive entry guidance for entry vehicles, with low lift-to-drag ratios, limited control authority, and large initial state bias, was presented. Typically, the entry guidance law is divided into four distinct phases: trim angle-of-attack phase, range control phase, heading alignment phase, and
Minwen Guo, Xiangyu Huang, Maodeng Li, Jinchang Hu, Chao Xu   +4 more
openaire   +1 more source

Combined application of block and modulation factors to reduce the volume of the low dose area in helical tomotherapy plans for lung cancer. [PDF]

J Appl Clin Med Phys
Abstract Background The helical tomotherapy (HT) system can expose more normal lung tissue to low radiation doses, resulting in extensive low‐dose distribution in both lungs which may induce radiation pneumonitis (RP). Purpose This study aims to optimize dosimetric parameters and identify a clinically feasible treatment plan by analyzing the impact of ...
Zhu S, Zhang T, Zhao Y, Peng J, Gao J, Yang Y, Xu Y, Yan J, Li Y.   +8 more
europepmc   +2 more sources

Preliminary Estimations of Mars Atmospheric and Ionospheric Profiles from Tianwen-1 Radio Occultation One-Way, Two-Way, and Three-Way Observations

Remote Sensing, 2023
The radio occultation method, one of the methods used to provide planetary atmospheric profiles with high vertical resolution, was applied to China’s first Mars mission, Tianwen-1.
Min Liu, Lue Chen, Nianchuan Jian, Peng Guo, Jing Kong, Mei Wang, Qianqian Han, Jinsong Ping, Mengjie Wu   +8 more
doaj   +1 more source

A Chinese Expert Consensus on the Artificial Intelligence Proficiency of Medical Students: Competencies and the Multi-Modal Assessment. [PDF]

Health Care Sci
This study proposes an AI literacy framework for medical students, structured around knowledge, skills, and attitudes with 21 core competencies. It stresses physician accountability, and bias vigilance alongside medical humanism. AUnidentified multimodal assessment system is introduced, using tests, SJTs, and OSCEs, with progresss tracked ...
Gong M, Li J, Ma Y, Jin B, Chen W, Hou Y, Hong L, Lai T, Zhang B, Wu G, Zeng Z.   +10 more
europepmc   +2 more sources

Reviewing in situ analytical techniques used to research Martian geochemistry: From the Viking Project to the MMX future mission [PDF]

, 2022
[EN] The study of space has always been a field of great interest and thus space missions are becoming more and more ambitious with time. Therefore, with the 50th anniversary of the first spacecraft to land on Mars, a review about how traditional ...
Aramendia Gutiérrez, Julene, Arana Momoitio, Gorka, Huidobro Martin, Jennifer, Madariaga Mota, Juan Manuel   +3 more
core   +2 more sources

Interplanetary Coronal Mass Ejections and Stream Interaction Regions Observed by Tianwen-1 and MAVEN at Mars

The Astrophysical Journal Supplement Series, 2023
The Tianwen-1 spacecraft is China's first Mars exploration mission. The Mars Orbiter Magnetometer (MOMAG) is a scientific instrument on board the Tianwen-1 mission that is designed to study magnetic fields at Mars, including the solar wind to the ...
Yutian Chi, Chenglong Shen, Long Cheng, Bingkun Yu, Bin Miao, Yuming Wang, Tielong Zhang, Zhuxuan Zou, Mengjiao Xu, Zonghao Pan, Zhenpeng Su, Jingnan Guo, Dongwei Mao, Zhihui Zhong, Zhiyong Zhang, Junyan Liu, Can Wang, Zhiyong Wu, Guoqiang Wang, Sudong Xiao, Kai Liu, Xinjun Hao, Yiren Li, Manming Chen, Yang Du   +24 more
doaj   +1 more source