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	Large-range piston error detection technology based on dispersed fringe sensor 会议论文 OAI收割 Chengdu, China, 2021-06-14 作者: Wang, Pengfei; Zhao, Hui; Xie, Xiaopeng; Zhang, Yating; Li, Chuang \| 收藏 \| 浏览/下载：19/0 \| 提交时间：2022/03/10 Astronomical observation dispersed fringe sensor co-phasing synthetic aperture
	Comparison of simulated backgrounds with in-orbit observations for HE, ME, and LE onboard Insight-HXMT 期刊论文 OAI收割 Astrophysics and Space Science, 2020, 卷号: 365, 页码: 158 作者: HXMT \| 收藏 \| 浏览/下载：47/0 \| 提交时间：2022/02/08 Insight-HXMT Geant4 simulation Background observation Astrophysics - Instrumentation and Methods for Astrophysics Abstract: Insight-HXMT, the first X-ray astronomical satellite in China, aims to reveal new sources in the Galaxy and to study fundamental physics of X-ray binaries from 1 to 250 keV. It has three collimated telescopes, the High Energy X-ray telescope (HE), the Medium Energy X-ray telescope (ME), and the Low Energy X-ray telescope (LE). Before the launch, in-orbit backgrounds of these three telescopes had been estimated through Geant4 simulation, in order to investigate the instrument performance and the achievement of scientific goals. In this work, these simulated backgrounds are compared with in-orbit observations. Good agreements are shown for all three telescopes. For HE, (1) the deviation of the simulated background rate after two years of operation in space is 5 % from the observation (2) the total background spectrum and the relative abundance of the 67 keV line show long-term increases both in simulations and observations. For ME, (1) the deviation of simulated background rate is within 15 % from the observation, and (2) there are no obvious long-term increase features in the background spectra of simulations and observations. For LE, the background level given by simulations is also consistent with observations. The consistencies of these comparisons validate that the Insight-HXMT mass model, i.e., space environment components and models adopted, physics processes selected, and detector constructions built, is reasonable. However, the line features at 7.5 and 8.0 keV, which are obvious in the observed spectra of LE, are not evident in simulations. This might result from uncertainties in the LE constructions.
	Real-time BDS signal-in-space anomaly detection method considering receiver anomalies 期刊论文 OAI收割 IET RADAR SONAR AND NAVIGATION, 2019, 卷号: 13, 期号: 12, 页码: 2220-2229 作者: Fan, Lihong; Tu, Rui; Zhang, Rui; Zheng, Zengji; Liu, Jinhai \| 收藏 \| 浏览/下载：32/0 \| 提交时间：2021/11/29 satellite navigation astronomical ephemerides telecommunication network reliability signal detection signal-in-space user range error SIS URE real-time navigation positioning users real-time SIS anomalies location services BeiDou satellites user range accuracy index navigation ephemeris anomaly detection threshold real-time observation data receiver anomalies BeiDou Navigation Satellite System MultiGlobal Navigation Satellite System Experiment precise ephemeris detection results real-time BDS signal-in-space anomaly detection method IURE international GNSS Monitoring & Assessment System
	Progress of research on anomalies of astronomical time and latitude observations before earthquake 期刊论文 OAI收割 CHINESE SCIENCE BULLETIN, 2012, 卷号: 57, 期号: 27, 页码: 3547-3555 作者: Wang Bo; Yin ZhiQiang; Han YanBen 收藏 \| 浏览/下载：21/0 \| 提交时间：2016/11/24 earthquake residuals of astronomical time and latitude the vertical variation astronomical observation DZT
	A hybrid median filter for enhancing dim small point targets and its fast implementation (EI CONFERENCE) 会议论文 OAI收割 2011 International Conference on Multimedia and Signal Processing, CMSP 2011, May 14, 2011 - May 15, 2011, Guilin, Guangxi, China Yang Q. 收藏 \| 浏览/下载：19/0 \| 提交时间：2013/03/25 Weak stars and middle altitude orbit satellites or high altitude orbit satellites are presented as dim point targets in images of astronomical observation. They have low intensity and occupy few pixels in image. In most situations the background of sky is always ununiform and there exists pulse noises. Thus results in targets submerging in background noises and low signal noise ratio (SNR). Median filter is an effective method for removing pulse noise. But it can blur image after modifying gray of non-noise pixels when image has low SNR. A hybrid median filter algorithm is proposed to process low SNR dim point targets image. The newly proposed method can suppress the pulse noises also can increase target $SNR$ and does not add extra fake targets. The time complexity of median filter is O(N2)(N is the widow size) and is difficult to implement in hardware. For quasi real time application a fast implementation of our hybrid median filter is proposed to reduce the time complexity to O(N). Experimental results show that the newly proposed algorithm is superior to ordinary median filter and fast median filter by comparing visual effect and performance. 2011 IEEE.
	Development of low readout noise scientific CCD camera for lunar astronomical observation 会议论文 OAI收割 international symposium on photoelectronic detection and imaging 2011: space exploration technologies and applications, beijing, china, may 24, 2011 - may 26, 2011 作者: WangHong 收藏 \| 浏览/下载：20/0 \| 提交时间：2012/07/09 Scientific CCD camera Lunar astronomical observation Readout noise System gain
	Approach to virtual observatory in Yunnan Observatory 会议论文 OAI收割 Conference on Virtual Observatories, Waikoloa, HI, United states, 2002-08-25 作者: Chen D(陈东); Luo GQ(罗国权); Li Z(李志); Wei KN(韦卡宁); Dai HB(代红兵) 收藏 \| 浏览/下载：16/0 \| 提交时间：2015/11/26 virtual observatory virtual astronomical instruments TCP/IP remote observation
	First observations of the water masers with the Urumqi 25m radio telescope 期刊论文 OAI收割 SCIENCE IN CHINA SERIES A-MATHEMATICS PHYSICS ASTRONOMY, 2001, 卷号: 44, 期号: 10, 页码: 1356-1360 作者: Zheng, XW; Esimbek, J; Zhou, JJ 收藏 \| 浏览/下载：22/0 \| 提交时间：2013/03/06 astronomical technique-calibration of the line observation HII regions-ISM : masers