The effects of spacecraft charging and outgassing on the LADEE ion measurements

	The effects of spacecraft charging and outgassing on the LADEE ion measurements
	Xie, Lianghai 1; Zhang, Xiaoping 1; Zheng, Yongchun1,2 ; Guo, Dawei 1
刊名	JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
	2017-05-01
卷号	122 期号:5 页码:5825-5834
英文摘要	Abnormal ion signals can be usually seen in the Lunar Atmosphere and Dust Environment Explorer (LADEE) mission, including a suddenly enhanced current observed by the Lunar Dust Experiment (LDEX) near the sunlight-shadow boundary and an unexpected water ion measured by the neutral mass spectrometer (NMS), with their magnitudes insensitive to the convection electric field of solar wind but dependent on the SW density and the elapsed time of LADEE mission. By analyzing both the LDEX measurements and the NMS measurements, we find that the current enhancement can be caused by a negatively charged spacecraft in the shadow region while the significant water ions should be some artificial ions from spacecraft outgassing. The artificial water ions show a peak near 8:00 LT that may be related to a sunlight-controlled surface outgassing. In addition, the H2O flux can be enhanced near the end of the mission when the spacecraft has a lower altitude. It is found that the H2O enhancement is actually caused by an exosphere-contributed return flux, rather than a real water exosphere.
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	LUNAR DUST EXPERIMENT ; ENVIRONMENT EXPLORER MISSION ; NEUTRAL MASS-SPECTROMETER ; ATMOSPHERE ; WAKE ; VARIABILITY
收录类别	SCI
语种	英语
WOS记录号	WOS:000403912500066
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/8828]
专题	国家天文台_月球与深空探测研究部
作者单位	1.Macau Univ Sci & Technol, Lunar & Planetary Sci Lab, Macau, Peoples R China 2.Chinese Acad Sci, Natl Astron Observ, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Xie, Lianghai,Zhang, Xiaoping,Zheng, Yongchun,et al. The effects of spacecraft charging and outgassing on the LADEE ion measurements[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,2017,122(5):5825-5834.
APA	Xie, Lianghai,Zhang, Xiaoping,Zheng, Yongchun,&Guo, Dawei.(2017).The effects of spacecraft charging and outgassing on the LADEE ion measurements.JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,122(5),5825-5834.
MLA	Xie, Lianghai,et al."The effects of spacecraft charging and outgassing on the LADEE ion measurements".JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 122.5(2017):5825-5834.