TOA estimation methods for the observation data based on the X-ray pulsar-based navigation-1 (XPNAV-1) satellite

doi:10.16708/j.cnki.1000-758X.2018.0001

Chinese Space Science and Technology ›› 2018, Vol. 38 ›› Issue (1): 1-7.doi: 10.16708/j.cnki.1000-758X.2018.0001

TOA estimation methods for the observation data based on the X-ray pulsar-based navigation-1 (XPNAV-1) satellite

Lin Qingqing^1,2,*, SHUAI Ping^1,2, HUANG Liangwei^1,2, ZHANG Xinyuan^1,2, CHEN Shaolong^1,2, WU Yaojun^1,2, BEI Xiaomin^1,2, MENG Jing^1,2, CHEN qiang^1,2, ZHANG qian^1,2, ZHANG Hengbin^1,2

1. Qian Xuesen Laboratory of Space Technology, Beijing 100094, China
2. China Academy of Space Technology, Beijing 100094, China

Received:2017-04-28 Accepted:2018-01-15 Published:2018-02-25 Online:2018-02-25

Abstract

Abstract: The first X-ray Pulsar-based Navigation-1 (XPNAV-1) satellite of China operates two X-ray instruments. The purpose of the XPNAV-1 mission is to detect the X-ray pulsars′ radiation photons and validate the pulsar navigation method. To acquire high precision pulse time of arrival (TOA) estimation, a novel method based on the multiple signal classification (MUSIC) algorithm was proposed, then numerical simulation was done for the novel method. The data from coordinate universaltime (UTC) 57727.0 MJD (modified Julian day) to UTC 57812.0 MJD of Crab pulsar observed by XPNAV-1 satellite was analyzed. Firstly, 121 pieces of the observations in the 0.5~10keV energy band were refined using epoch folding method. Secondly, the TOA of the epoch folding profiles was estimated by cross correlation method and MUSIC method. Finally, the estimations of the two methods were analyzed.

Key words: pular, XPNAV-1, Crab, epoch folding, time-of-arrival (TOA) estimation

Lin Qingqing, SHUAI Ping, HUANG Liangwei, ZHANG Xinyuan, CHEN Shaolong, WU Yaojun, BEI Xiaomin, MENG Jing, CHEN Qiang, ZHANG Qian, ZHANG Hengbin. TOA estimation methods for the observation data based on the X-ray pulsar-based navigation-1 (XPNAV-1) satellite[J]. Chinese Space Science and Technology, 2018, 38(1): 1-7.

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[2]	HUANG Liang-Wei, SHUAI Ping, ZHANG Xin-Yuan, CHEN Shao-Long, XU Li-Hong, YANG Zhe, DENG Lou-Lou, CHEN Jian-Wu, SHI Yong-Qiang, XUE Li-Jun, DING Qiang-Qiang, WU Yao-Jun, BEI Xiao-Min, MENG Jing, LIN Qing-Qing, CHEN Qiang, ZHANG Qian, ZHANG Heng-Bin. XPNAV-1Satellitetimingdataanalysisandpulseprofilerecovery [J]. Chinese Space Science and Technology, 2017, 37(2): 1-10.
[3]	Wang Zhimin (Center for Remote Sensing in Geology,MGMR). APPLICATION OF CHINESE LAND RESOURCES SATELLITE IN GEOLOGICAL STUDIES [J]. Chinese Space Science and Technology, 1991, 11(03): 18-23.

TOA estimation methods for the observation data based on the X-ray pulsar-based navigation-1 (XPNAV-1) satellite

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