A digital open-loop Doppler processing prototype for deep-space navigation

NAOC Open IR

	A digital open-loop Doppler processing prototype for deep-space navigation
	Jian NianChuan 1; Shang Kun 1; Zhang SuJun 1; Wang MingYuan1 ; Shi Xian 1; Ping JingSong1 ; Yan JianGuo 3; Tang GeShi 4; Liu JunZe 4; Qiu Shi 1; Fung LaiWo 1; Zhang Hua 5; Wang Zhen 5; Gou Wei 1
	2009
Source Publication	SCIENCE IN CHINA SERIES G-PHYSICS MECHANICS & ASTRONOMY
ISSN	1672-1799
Volume	52 Issue:12 Pages:1849
Abstract	A prototype based on digital radio technology with associated open-loop Doppler signal processing techniques has been developed to measure a spacecraft's line-of-sight velocity. The prototype was tested in China's Chang'E-1 lunar mission relying on S-band telemetry signals transmitted by the satellite, with results showing that the residuals had a RMS value of similar to 3 mm/s (1 sigma) using 1-sec integration, which is consistent with the Chinese conventional USB (Unified S-Band) tracking system. Such precision is mainly limited by the short-term stability of the atomic (e.g. rubidium) clock at the uplink ground station. It can also be improved with proper calibration to remove some effects of the transmission media (such as solar plasma, troposphere and ionosphere), and a longer integration time (e.g. down to 0.56 mm/s at 34 seconds) allowed by the spacecraft dynamics. The tracking accuracy can also be increased with differential methods that may effectively remove most of the long-term drifts and some of the short-term uncertainties of the uplink atomic clock, thereby further reducing the residuals to the 1 mmls level. Our experimental tracking data have been used in orbit determination for Chang'E-1, while other applications (such as the upcoming YH-1 Mars orbiter) based on open-loop Doppler tracking will be initiated in the future. Successful application of the prototype to the Chang'E-1 mission in 2008 is believed to have great significance for China's future deep space exploration.
Keyword	open-loop Doppler differential Doppler deep space navigation Chang'E-1
Language	英语
Funding Project	[Research Plan of CAS] ; [National Natural Science Foundation of China] ; [CAS] ; [Beijing Aerospace Command and Control Center]
Document Type	期刊论文
Identifier	http://ir.bao.ac.cn/handle/114a11/62511
Collection	中国科学院国家天文台
Affiliation	1.中国科学院国家天文台 2.中国科学院 3.武汉大学 4.Beijing Aerosp Command & Control Ctr, Beijing 100094, Peoples R China 5.中国科学院新疆天文台
First Author Affilication	National Astronomical Observatories, Chinese Academy of Sciences
Recommended Citation GB/T 7714	Jian NianChuan,Shang Kun,Zhang SuJun,et al. A digital open-loop Doppler processing prototype for deep-space navigation[J]. SCIENCE IN CHINA SERIES G-PHYSICS MECHANICS & ASTRONOMY,2009,52(12):1849.
APA	Jian NianChuan.,Shang Kun.,Zhang SuJun.,Wang MingYuan.,Shi Xian.,...&Gou Wei.(2009).A digital open-loop Doppler processing prototype for deep-space navigation.SCIENCE IN CHINA SERIES G-PHYSICS MECHANICS & ASTRONOMY,52(12),1849.
MLA	Jian NianChuan,et al."A digital open-loop Doppler processing prototype for deep-space navigation".SCIENCE IN CHINA SERIES G-PHYSICS MECHANICS & ASTRONOMY 52.12(2009):1849.

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