Wang, Limin; Li, Lei; Li, Wenya; Kong, Linggao; Tang, Binbin; Ma, Jijie; Zhang, Yiteng; Xie, Lianghai; Zhang, Aibing; Qiao, Fuhao; Wurz, Peter; Galli, André (2024). Characterizing and Removing Ultra-Violet Contamination in Ion Observations on Board Tianwen-1. Atmosphere, 15(1), p. 19. MDPI 10.3390/atmos15010019
|
Text
atmosphere-15-00019-v2.pdf - Published Version Available under License Creative Commons: Attribution (CC-BY). Download (6MB) | Preview |
The Mars Ion and Neutral Particle Analyzer (MINPA) onboard Tianwen-1 aims to study the
interaction between Mars and the solar wind via in situ ion measurement and energetic neutral atom
imaging. Despite the efforts for Ultra-Violet suppression in MINPA design, 0.48% of ion observations
from November 2021 to July 2022 were identified as UV-contaminated. The UV emissions primarily
penetrate into the instrument through the ENA entrance. Statistically, the distribution of the UV
contamination in phase space typically spans 3 to 4 azimuth sectors. The contamination is uniformly
distributed across the polar dimension while, in the energy and mass dimensions, it is proportional to
the time-of-flight duration. Comparisons between the in-flight performance and ground calibration
suggest that azimuthal broadening and intensity variations of the contamination may result from
differing responses across the azimuthal sectors. Based on the characteristics of the UV impact on
MINPA ion observations, a removal algorithm is proposed to reduce contamination while preserving
valid signals, which improves the data quality effectively and benefits the interpretation of MINPA’s
ion measurements in the Martian space environment. The cause, effect, and distribution of the UV
contamination obtained by this study may serve as a reference for other space ion observations.
Item Type: |
Journal Article (Original Article) |
|---|---|
Division/Institute: |
08 Faculty of Science > Physics Institute > Space Research and Planetary Sciences 08 Faculty of Science > Physics Institute |
UniBE Contributor: |
Li, Wenya, Wurz, Peter, Galli, A |
Subjects: |
500 Science > 530 Physics 500 Science > 520 Astronomy 600 Technology > 620 Engineering |
ISSN: |
2073-4433 |
Publisher: |
MDPI |
Language: |
English |
Submitter: |
Dora Ursula Zimmerer |
Date Deposited: |
21 Mar 2024 16:50 |
Last Modified: |
21 Mar 2024 16:50 |
Publisher DOI: |
10.3390/atmos15010019 |
BORIS DOI: |
10.48350/194341 |
URI: |
https://boris.unibe.ch/id/eprint/194341 |
Actions (login required)
 |
Edit item |