- 必威体育下载

姓名
邮箱
手机号码
标题
留言内容
验证码

Abstract

Pulsar time (PT) has high long-term stability, and its establishment process is completely different from that of atomic time (AT). Therefore, pulsar-based time scale can be used as an independent test for the fluctuation of atomic time scale. In this paper, the test results of the fluctuation of atomic time using pulsar time are presented in combination with the real clock difference data. In order to test the fluctuation of atomic time, the timing model parameters of four pulsars are used to simulate the pulse times of arrival (TOAs) data with TT(BIPM19) as the reference, and then the reference time is changed from TT(BIPM19) to TT(TAI). Based on this, the classical weighted average algorithm and the Wiener filtering algorithm are used to extract the variations of the atomic time relative to the pulsar time. The test results obtained by the two methods are compared, and it shows that the Wiener filtering algorithm is better than the weighted average algorithm for the extraction of the fluctuation of the atomic time. The wavelet threshold denoising method is added to the clock difference signal extracted by the Wiener filtering algorithm to deduct the high-frequency noise. After denoising, PT is closer to TT(BIPM19), which further improves the ability of PT to detect the fluctuation of AT. For the TOA measurement accuracy of 100 ns, the difference between PT and TT(BIPM19) can be kept roughly within 40 ns. This paper studies the method of further improving the accuracy of PT under the premise of given TOA measurement accuracy, which is of great significance for the next step to use PT for more effective application of time keeping.

Keywords:

Authors and contacts

Corresponding author:Tong Ming-Lei,mltong@ntsc.ac.cn

Funds:Project supported by the SKA Project of the Ministry of Science and Technology of China (Grant No. 2020SKA0120103) and the National Natural Science Foundation of China (Grant No. U1831130)

FullText HTML: translate this paragraph

References

[1]
[2]
[3]
[4]
[5]
[6]
[7]
[8]
[9]
[10]
[11]
[12]
[13]
[14]
[15]
[16]
[17]
[18]
[19]
[20]
[21]
[22]
[23]
[24]
[25]
[26]
[27]
[28]
[29]
[30]
[31]
[32]
[33]
[34]
[35]
[36]
[37]
[38]

Cited By

DownLoad: Full-Size Img PowerPoint

参数	含义	数值
PSRJ	脉冲星名称	J0437-4715	J1713+0747	J1744-1134	J1909-3744
RAJ/(hh:mm:ss.sss)	J2000赤经	04:37:15.8961766	17:13:49.5327233	17:44:29.4057898	19:09:47.4346727
DECJ/(°)	J2000赤纬	–47:15:09.11071	+07:47:37.49783	–11:34:54.68134	–37:44:14.46677
F₀/$\rm{s}^{-1}$	自转频率	173.6879458121841	218.8118404348010	245.4261197130545	339.3156872882437
F₁/$\rm{s}^{-2}$	自转频率的一阶导数	–1.728362 × 10^–¹⁵	–4.08381×10^–¹⁶	–5.38183 × 10^–¹⁶	–1.614845 × 10^–¹⁵
PEPOCH/MJD	周期确定的历元	54500	54500	54500	54500
DM/($\rm{cm^{-3}\cdot pc}$)	色散	2.6449	15.9903	3.1369	10.3927

DownLoad: CSV

PSR	J0437-4715	J1713+0747	J1744-1134	J1909-3744
RMS/μs	0.215	0.457	0.653	0.191
$w_i$	0.385	0.085	0.042	0.488

DownLoad: CSV

[1]
[2]
[3]
[4]
[5]
[6]
[7]
[8]
[9]
[10]
[11]
[12]
[13]
[14]
[15]
[16]
[17]
[18]
[19]
[20]
[21]
[22]
[23]
[24]
[25]
[26]
[27]
[28]
[29]
[30]
[31]
[32]
[33]
[34]
[35]
[36]
[37]
[38]

[1]	Shi Yue, Ou Pan, Zheng Ming, Tai Han-Xu, Wang Yu-Hong, Duan Ruo-Nan, Wu Jian.Artifact noise suppression of particle-field computed tomography based on lightweight residual and enhanced convergence neural network. Acta Physica Sinica, 2024, 73(10): 104202.doi:10.7498/aps.73.20231902
[2]	Zhou Qing-Yong, Wei Zi-Qing, Yan Lin-Li, Sun Peng-Fei, Liu Si-Wei, Feng Lai-Ping, Jiang Kun, Wang Yi-Di, Zhu Yong-Xing, Liu Xiao-Gang, Ming Feng, Zhang Fen, He Zhen-Ni.Space/ground based pulsar timescale for comprehensive PNT system. Acta Physica Sinica, 2021, 70(13): 139701.doi:10.7498/aps.70.20210288
[3]	Zheng Tian-Yun, Wang Sheng-Ye, Wang Guang-Xue, Deng Xiao-Gang.High-order natural transition simulation method based on deep residual network. Acta Physica Sinica, 2020, 69(20): 204701.doi:10.7498/aps.69.20200563
[4]	Lin Yi-Ge, Fang Zhan-Jun.Strontium optical lattice clock. Acta Physica Sinica, 2018, 67(16): 160604.doi:10.7498/aps.67.20181097
[5]	Kang Zhi-Wei, Wu Chun-Yan, Liu Jin, Ma Xin, Gui Ming-Zhen.Pulsar time delay estimation method based on two-level compressed sensing. Acta Physica Sinica, 2018, 67(9): 099701.doi:10.7498/aps.67.20172100
[6]	Fang Hai-Yan, Liu Bing, Li Xiao-Ping, Sun Hai-Feng, Xue Meng-Fan, Shen Li-Rong, Zhu Jin-Peng.Time delay estimation method of X-ray pulsar observed profile based on the optimal frequency band. Acta Physica Sinica, 2016, 65(11): 119701.doi:10.7498/aps.65.119701
[7]	Chen Dian-Bing, Zhu Ming, Gao Wen, Wang Hui-Li, Yang Hang.Visual tracking based on the estimation of representation residual matrix. Acta Physica Sinica, 2016, 65(19): 194201.doi:10.7498/aps.65.194201
[8]	Song Jia-Ning, Xu Guo-Dong, Li Peng-Fei.Multiple harmonic X-ray pulsar signal phase estimation method. Acta Physica Sinica, 2015, 64(21): 219702.doi:10.7498/aps.64.219702
[9]	Lin Xu, Luo Zhi-Cai.A new noise covariance matrix estimation method of Kalman filter for satellite clock errors. Acta Physica Sinica, 2015, 64(8): 080201.doi:10.7498/aps.64.080201
[10]	Zhou Qing-Yong, Ji Jian-Feng, Ren Hong-Fei.Timing equation in X-ray pulsar autonomous navigation. Acta Physica Sinica, 2013, 62(13): 139701.doi:10.7498/aps.62.139701
[11]	Sun Hai-Feng, Xie Kai, Li Xiao-Ping, Fang Hai-Yan, Liu Xiu-Ping, Fu Ling-Zhong, Sun Hai-Jian, Xue Meng-Fan.A simulation technique of X-ray pulsar signals with high timing stability. Acta Physica Sinica, 2013, 62(10): 109701.doi:10.7498/aps.62.109701
[12]	Wang Lu, Xu Lu-Ping, Zhang Hua, Luo Nan.Pulsar signal detection based on S-transform. Acta Physica Sinica, 2013, 62(13): 139702.doi:10.7498/aps.62.139702
[13]	Han Xiao, Yin Jing-Wei, Guo Long-Xiang, Zhang Xiao.Research on bionic underwater acoustic communication technology based on differential Pattern time delay shift coding and dolphin whistles. Acta Physica Sinica, 2013, 62(22): 224301.doi:10.7498/aps.62.224301
[14]	Zhou Qing-Yong, Ji Jian-Feng, Ren Hong-Fei.Quick search algorithm of X-ray pulsar period based on unevenly spaced timing data. Acta Physica Sinica, 2013, 62(1): 019701.doi:10.7498/aps.62.019701
[15]	Bi Yan-Meng, Chen Jie, Yang Guang-lin, Liao mi, Wu Rong-Hua.GPS occultation excess phase computed utilizing the updated single difference technique. Acta Physica Sinica, 2012, 61(14): 149301.doi:10.7498/aps.61.149301
[16]	Zhang Hua, Xu Lu-Ping.Minimum entropy cumulation method of pulsar profile. Acta Physica Sinica, 2011, 60(3): 039701.doi:10.7498/aps.60.039701
[17]	Wei Bing, Dong Yu-Hang, Wang Fei, Li Cun-Zhi.A modificatory algorithm for electrically thin dispersive layers base on shift operator finite-difference time-domain method. Acta Physica Sinica, 2010, 59(4): 2443-2450.doi:10.7498/aps.59.2443
[18]	Zhang Yu-Qiang, Ge De-Biao.An improved shift operator finite-difference time-domain method based on digital signal processing technique for general dispersive medium. Acta Physica Sinica, 2009, 58(12): 8243-8248.doi:10.7498/aps.58.8243
[19]	Zhong Chong-Xia, Yang Ting-Gao.Use of wiener filtration in wavelet domain in ensemble pulsar time algorithm. Acta Physica Sinica, 2007, 56(10): 6157-6163.doi:10.7498/aps.56.6157
[20]	Cheng Tan-sheng;Zeng Jin-yan.MOMENS OF INERTIA OF EXCITED BANDS AND THE EVEN一ODD DIFFERENCE. Acta Physica Sinica, 1977, 26(3): 243-249.doi:10.7498/aps.26.243

Catalog

Vol. 72, Issue 7 - 2023-04-05

Metrics

Abstract views:2740
PDF Downloads:60
Cited By:0

Search

Article