2016 Radio Frequency Interference (RFI)最新文献

The RFI situation for a space-based low-frequency radio astronomy instrument 天基低频射电天文仪器的RFI情况

2016 Radio Frequency Interference (RFI) Pub Date : 2016-10-18 DOI: 10.1109/RFINT.2016.7833521

M. Bentum, A. Boonstra

引用次数: 7

Interference from global navigation satellites in future HI intensity mapping surveys 未来高强度测绘调查中全球导航卫星的干扰

2016 Radio Frequency Interference (RFI) Pub Date : 2016-10-01 DOI: 10.1109/RFINT.2016.7833527

S. Harper, C. Dickinson

{"title":"Interference from global navigation satellites in future HI intensity mapping surveys","authors":"S. Harper, C. Dickinson","doi":"10.1109/RFINT.2016.7833527","DOIUrl":"https://doi.org/10.1109/RFINT.2016.7833527","url":null,"abstract":"Upcoming HI intensity mapping (IM) surveys will need to achieve unprecedented levels of sensitivity in order to measure the weak integrated emission of extra-galactic HI. Such sensitive surveys will need to overcome many systematic contaminations within the data. One such contaminant originates from the Global Navigation Satellite System (GNSS). Emissions from radio-navigation satellites within the GNSS broadcast across a wide-range of cosmological interesting frequencies (1164 to 1610 MHz), with an in band brightness that is comparable to the Sun. These proceedings use simulations of observations from the upcoming BINGO experiment to explore the effect of GNSS emissions on HI IM data. These simulations are not overly concerned with bright, stochastic events corresponding to a satellite transiting the BINGO main beam response, which can be removed via post-processing of the data. The principle concern is the low-level interactions of the satellites within the side lobes of the BINGO beam and out-of-band transmissions due to the frequency side lobes of the transmitter. The results of these proceedings find that the HI IM signal will be almost three orders-of-magnitude weaker than integrated emission of radio-navigation satellites interacting within the BINGO side lobes. For out-of-band interference, the simulations reveal that the emission from satellites could be comparable to HI signal almost 100 MHz away from the GNSS transmission bands. The implication of these results is that there will be increased challenges for all future HI IM observations of the dark-energy dominated epoch, which includes the proposed BINGO, FAST and SKA1-MID surveys.","PeriodicalId":298772,"journal":{"name":"2016 Radio Frequency Interference (RFI)","volume":"102 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126965955","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

RFI detection and mitigation using independent component analysis as a pre-processor 使用独立分量分析作为预处理器的RFI检测和缓解

2016 Radio Frequency Interference (RFI) Pub Date : 2016-10-01 DOI: 10.1109/RFINT.2016.7833540

Adam J. Schoenwald, A. Gholian, D. Bradley, M. Wong, P. Mohammed, J. Piepmeier

引用次数: 6

L-band RFI in Japan 日本的l波段RFI

2016 Radio Frequency Interference (RFI) Pub Date : 2016-10-01 DOI: 10.1109/RFINT.2016.7833542

Y. Soldo, P. de Matthaeis, D. L. Le Vine

引用次数: 8

Real-time RFI excision for the GMRT wideband correlator GMRT宽带相关器的实时RFI切除

2016 Radio Frequency Interference (RFI) Pub Date : 2016-10-01 DOI: 10.1109/RFINT.2016.7833523

K. Buch, Y. Gupta, Shruti Bhatporia, Swapnil Nalawade, K. Naik, B. Ajithkumar

引用次数: 2

Real time prediction, detection and co-existing with satellite interference at GMRT GMRT实时预测、探测并与卫星干扰共存

2016 Radio Frequency Interference (RFI) Pub Date : 2016-10-01 DOI: 10.1109/RFINT.2016.7833539

P. Raybole, S. Sureshkumar, S. Katore, S. Rai

{"title":"Real time prediction, detection and co-existing with satellite interference at GMRT","authors":"P. Raybole, S. Sureshkumar, S. Katore, S. Rai","doi":"10.1109/RFINT.2016.7833539","DOIUrl":"https://doi.org/10.1109/RFINT.2016.7833539","url":null,"abstract":"Modern radio telescopes were designed for wider bandwidth to use the interference free bands for radio astronomy. Many intentional radiations are directional and line of site, pointing can be avoided to prevent receiver saturation. About 35000 Satellites are in space to provide voice and data service, navigation, GPS, weather, military and various space programs. These satellite footprints are larger to cover wide area and produce interference to radio telescopes. These satellites are geo stationary, geo synchronous, low, and medium orbiting satellites whose locations and orbits have been characterized with the precise servo system of GMRT antennas. The individual satellite signals have been characterized for its frequency, power level and beam width using GMRT antenna and receiver. The antenna control and monitoring system of GMRT observatory is programmed to produce an alarm whenever the antenna beam is nearing a satellite. The software tools provide prediction of these satellite cross over with any scheduled radio astronomy observation, real time location of the antenna beam with adjacent line of site satellites on the sky and tools to post process the old astronomical data for flagging the duration of satellite signal overlap or saturation. The soft tools will be used to apply digital filtering techniques to mitigate these satellite signals in real time or during post processing. The paper presents the detail characterization of satellite interference to GMRT and the software tools developed to co-exist with satellite interference with detail analysis of the loss of signal or data for any given astronomical observation.","PeriodicalId":298772,"journal":{"name":"2016 Radio Frequency Interference (RFI)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130956757","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 10

Quantified interference level limits for QTT key areas QTT关键区域的定量干扰电平限制

2016 Radio Frequency Interference (RFI) Pub Date : 2016-10-01 DOI: 10.1109/RFINT.2016.7833531

Qi Liu, Ye Liu, Na Wang, Mao-zheng Chen

引用次数: 3

RFI in Mauritius 毛里求斯的RFI

2016 Radio Frequency Interference (RFI) Pub Date : 2016-10-01 DOI: 10.1109/RFINT.2016.7833537

V. Prayag, G. K. Beeharry, Nazir Vydelingum, M. Inggs

引用次数: 0

Spatial filtering experiment with the ASKAP beta array 用ASKAP β阵列进行空间滤波实验

2016 Radio Frequency Interference (RFI) Pub Date : 2016-10-01 DOI: 10.1109/RFINT.2016.7833528

G. Hellbourg, K. Bannister, Aidan HotarP

引用次数: 5

Spectral kurtosis statistics of quantized signals 量化信号的谱峰度统计

2016 Radio Frequency Interference (RFI) Pub Date : 2016-10-01 DOI: 10.1109/RFINT.2016.7833535

G. Nita, D. Gary, G. Hellbourg

引用次数: 4