Related papers: Mitigation of self-generated RFI using ASKAP's pha…

RFI Flagging Implications for Short-Duration Transients

With their wide fields of view and often relatively long coverage of any position in the sky in imaging survey mode, modern radio telescopes provide a data stream that is naturally suited to searching for rare transients. However, Radio…

Instrumentation and Methods for Astrophysics · Physics 2018-04-16 Y. Cendes , P. Prasad , A. Rowlinson , R. A. M. J. Wijers , J. D. Swinbank , C. J. Law , A. J. van der Horst , D. Carbone , J. W. Broderick , T. D. Staley , A. J. Stewart , F. Huizinga , G. Molenaar , A. Alexov , M. E. Bell , T. Coenen , S. Corbel , J. Eislöffel , R. Fender , J. -M. Grießmeier , P. Jonker , M. Kramer , M. Kuniyoshi , M. Pietka , B. Stappers , M. Wise , P. Zarka

Evaluating the effectiveness of radio frequency interference removal algorithms for single pulse searches

Radio Frequency Interference (RFI), the presence of artificial and/or terrestrial signals in astronomical data, poses a great challenge to the search for pulsars and radio transients, such as Rotating Radio Transients (RRATs) and Fast Radio…

Instrumentation and Methods for Astrophysics · Physics 2026-01-15 R. S. Hombal , L. Levin , B. W. Stappers , M. Droog , A. Karastergiou , D. Lumbaa , M. B. Mickaliger , A. Naidu , K. M. Rajwade , J. Sepulveda , B. Shaw , S. Singh , T. Prabu

The Australian Square Kilometre Array Pathfinder: Performance of the Boolardy Engineering Test Array

We describe the performance of the Boolardy Engineering Test Array (BETA), the prototype for the Australian Square Kilometre Array Pathfinder telescope ASKAP. BETA is the first aperture synthesis radio telescope to use phased array feed…

Instrumentation and Methods for Astrophysics · Physics 2016-09-21 D. McConnell , J. R. Allison , K. Bannister , M. E. Bell , H. E. Bignall , A. P. Chippendale , P. G. Edwards , L. Harvey-Smith , S. Hegarty , I. Heywood , A. W. Hotan , B. T. Indermuehle , E. Lenc , J. Marvil , A. Popping , W. Raja , J. E. Reynolds , R. J. Sault , P. Serra , M. A. Voronkov , M. Whiting , S. W. Amy , P. Axtens , L. Ball , T. J. Bateman , D. C. -J. Bock , R. Bolton , D. Brodrick , M. Brothers , A. J. Brown , J. D. Bunton , W. Cheng , T. Cornwell , D. DeBoer , I. Feain , R. Gough , N. Gupta , J. C. Guzman , G. A. Hampson , S. Hay , D. B. Hayman , S. Hoyle , B. Humphreys , C. Jacka , C. A. Jackson , S. Jackson , K. Jeganathan , J. Joseph , B. S. Koribalski , M. Leach , E. S. Lensson , A. MacLeod , S. Mackay , M. Marquarding , N. M. McClure-Griffiths , P. Mirtschin , D. Mitchell , S. Neuhold , A. Ng , R. Norris , S. Pearce , R. Y. Qiao , A. E. T. Schinckel , M. Shields , T. W. Shimwell , M. Storey , E. Troup , B. Turner , J. Tuthill , A. Tzioumis , R. M. Wark , T. Westmeier , C. Wilson , T. Wilson

Radio frequency interference mitigation using deep convolutional neural networks

We propose a novel approach for mitigating radio frequency interference (RFI) signals in radio data using the latest advances in deep learning. We employ a special type of Convolutional Neural Network, the U-Net, that enables the…

Instrumentation and Methods for Astrophysics · Physics 2017-01-16 Joel Akeret , Chihway Chang , Aurelien Lucchi , Alexandre Refregier

Radio Weak Lensing Shear Measurement in the Visibility Domain - I. Methodology

The high sensitivity of the new generation of radio telescopes such as the Square Kilometre Array (SKA) will allow cosmological weak lensing measurements at radio wavelengths that are competitive with optical surveys. We present an…

Instrumentation and Methods for Astrophysics · Physics 2016-09-23 Marzia Rivi , Lance Miller , Sphesihle Makhathini , Filipe Batoni Abdalla

RFI detection by automated feature extraction and statistical analysis

In this paper we present an interference detection toolbox consisting of a high dynamic range Digital Fast-Fourier-Transform spectrometer (DFFT, based on FPGA-technology) and data analysis software for automated radio frequency interference…

Astrophysics · Physics 2007-05-23 Benjamin Winkel , Juergen Kerp , Stephan Stanko

Quantifying Excess Power from Radio Frequency Interference in Epoch of Reionization Measurements

We quantify the effect of radio frequency interference (RFI) on measurements of the 21-cm power spectrum during the Epoch of Reionization (EoR). Specifically, we investigate how the frequency structure of RFI source emission generates…

Instrumentation and Methods for Astrophysics · Physics 2020-09-09 Michael J. Wilensky , Nichole Barry , Miguel F. Morales , Bryna J. Hazelton , Ruby Byrne

Operational Non-identifiability of Single-epoch Low-rank RFI Mitigation: Controlled Failure-mode Analysis and HERA Evidence

The rapid proliferation of low Earth orbit (LEO) satellite constellations has introduced a new class of radio frequency interference (RFI) that poses a fundamental challenge to modern radio astronomy. In particular, unintended…

Instrumentation and Methods for Astrophysics · Physics 2026-04-20 Yujin Kim

Interference detection in radio astronomy applying Shapiro-Wilks normality test, spectral entropy, and spectral relative entropy

Radio-frequency interference (RFI) is becoming an increasingly significant problem for most radio telescopes. Working with Green Bank Telescope data from PSR J1730+0747 in the form of complex-valued channelized voltages and their respective…

Instrumentation and Methods for Astrophysics · Physics 2024-08-14 Zhicheng Cao , Natalia A. Schmid , Kevin Bandura , Duncan R. Lorimer , Morgan Dameron , Katelyn Crockett , Clayton Grubick , Andreas Schmid , Shaonan Zheng

Characterising the Apertif primary beam response

Context. Phased Array Feeds (PAFs) are multi element receivers in the focal plane of a telescope that make it possible to form simultaneously multiple beams on the sky by combining the complex gains of the individual antenna elements.…

Instrumentation and Methods for Astrophysics · Physics 2022-11-09 H. Dénes , K. M. Hess , E. A. K. Adams , A. Kutkin , R. Morganti , J. M. van der Hulst , T. A. Oosterloo , V. A. Moss , B. Adebahr , W. J. G. de Blok , M. V. Ivashina , A. H. W. M. Coolen , S. Damstra , B. Hut , G. M. Loose , D. M. Lucero , Y. Maan , Á. Mika , M. J. Norden , L. C. Oostrum , D. J. Pisano , R. Smits , W. A. van Cappellen , R. van den Brink , D. van der Schuur , G. N. J. van Diepen , J. van Leeuwen , D. Vohl , S. J. Wijnholds , J. Ziemke

A Conditional Denoising Diffusion Probabilistic Model for RFI Mitigation in Synthetic Aperture Interferometric Radiometer

In Earth remote sensing, spatial-frequency domain visibility samples are inversely transformed into spatial-domain brightness temperature (BT) images through the signal processing pipeline of synthetic aperture interferometric radiometers…

Signal Processing · Electrical Eng. & Systems 2026-04-03 Yuankai Luo , Han Zhou , Jinlong Hao , Dong Zhu , Fei Hu

The LOFAR radio environment

Aims: This paper discusses the spectral occupancy for performing radio astronomy with the Low-Frequency Array (LOFAR), with a focus on imaging observations. Methods: We have analysed the radio-frequency interference (RFI) situation in two…

Instrumentation and Methods for Astrophysics · Physics 2012-10-04 A. R. Offringa , A. G. de Bruyn , S. Zaroubi , G. van Diepen , O. Martinez-Ruby , P. Labropoulos , M. A. Brentjens , B. Ciardi , S. Daiboo , G. Harker , V. Jelic , S. Kazemi , L. V. E. Koopmans , G. Mellema , V. N. Pandey , R. F. Pizzo , J. Schaye , H. Vedantham , V. Veligatla , S. J. Wijnholds , S. Yatawatta , P. Zarka , A. Alexov , J. Anderson , A. Asgekar , M. Avruch , R. Beck , M. Bell , M. R. Bell , M. Bentum , G. Bernardi , P. Best , L. Birzan , A. Bonafede , F. Breitling , J. W. Broderick , M. Bruggen , H. Butcher , J. Conway , M. de Vos , R. J. Dettmar , J. Eisloeffel , H. Falcke , R. Fender , W. Frieswijk , M. Gerbers , J. M. Griessmeier , A. W. Gunst , T. E. Hassall , G. Heald , J. Hessels , M. Hoeft , A. Horneffer , A. Karastergiou , V. Kondratiev , Y. Koopman , M. Kuniyoshi , G. Kuper , P. Maat , G. Mann , J. McKean , H. Meulman , M. Mevius , J. D. Mol , R. Nijboer , J. Noordam , M. Norden , H. Paas , M. Pandey , R. Pizzo , A. Polatidis , D. Rafferty , S. Rawlings , W. Reich , H. J. A. Rottgering , A. P. Schoenmakers , J. Sluman , O. Smirnov , C. Sobey , B. Stappers , M. Steinmetz , J. Swinbank , M. Tagger , Y. Tang , C. Tasse , A. van Ardenne , W. van Cappellen , A. P. van Duin , M. van Haarlem , J. van Leeuwen , R. J. van Weeren , R. Vermeulen , C. Vocks , R. A. M. J. Wijers , M. Wise , O. Wucknitz

Supervised Radio Frequency Interference Detection with SNNs

Radio Frequency Interference (RFI) poses a significant challenge in radio astronomy, arising from terrestrial and celestial sources, disrupting observations conducted by radio telescopes. Addressing RFI involves intricate heuristic…

Neural and Evolutionary Computing · Computer Science 2024-12-09 Nicholas J. Pritchard , Andreas Wicenec , Mohammed Bennamoun , Richard Dodson

LOFAR Observations of Swift J1644+57 and Implications for Short-Duration Transients

Aims: We have analyzed low frequency radio data of tidal disruption event (TDE) Swift J1644+57 to search for a counterpart. We consider how brief transient signals (on the order of seconds or minutes) originating from this location would…

High Energy Astrophysical Phenomena · Physics 2014-12-15 Y. Cendes , R. A. M. J. Wijers , J. D. Swinbank , A. Rowlinson , A. J. van der Horst , D. Carbone , J. W. Broderick , T. D. Staley , A. J. Stewart , G. Molenaar , F. Huizinga , A. Alexov , M. E. Bell , T. Coenen , S. Corbel , J. Eislöffel , R. Fender , J. Grießmeier , J. Hessel , P. Jonker , M. Kramer , M. Kuniyoshi , C. J. Law , S. Markoff , M. Pietka , B. Stappers , M. Wise , P. Zarka

Science with the Australian Square Kilometre Array Pathfinder (ASKAP)

The future of cm and m-wave astronomy lies with the Square Kilometre Array (SKA), a telescope under development by a consortium of 17 countries that will be 50 times more sensitive than any existing radio facility. Most of the key science…

Cosmology and Nongalactic Astrophysics · Physics 2009-03-25 Simon Johnston , Ilana J. Feain , Neeraj Gupta

Primary Beam Shape Calibration from Mosaicked, Interferometric Observations

Image quality in mosaicked observations from interferometric radio telescopes is strongly dependent on the accuracy with which the antenna primary beam is calibrated. The next generation of radio telescope arrays such as the Allen Telescope…

Instrumentation and Methods for Astrophysics · Physics 2015-05-20 Charles L. H. Hull , Geoffrey C. Bower , Steve Croft , Peter K. G. Williams , Casey Law , David Whysong

Apertif, Phased Array Feeds for the Westerbork Synthesis Radio Telescope

We describe the APERture Tile In Focus (Apertif) system, a phased array feed (PAF) upgrade of the Westerbork Synthesis Radio Telescope which has transformed this telescope into a high-sensitivity, wide field-of-view L-band imaging and…

Instrumentation and Methods for Astrophysics · Physics 2022-03-14 W. A. van Cappellen , T. A. Oosterloo , M. A. W. Verheijen , E. A. K. Adams , B. Adebahr , R. Braun , K. M. Hess , H. Holties , J. M. van der Hulst , B. Hut , E. Kooistra , J. van Leeuwen , G. M. Loose , R. Morganti , V. A. Moss , E. Orrú , M. Ruiter , A. P. Schoenmakers , N. J. Vermaas , S. J. Wijnholds , A. S. van Amesfoort , M. J. Arts , J. J. Attema , L. Bakker , C. G. Bassa , J. E. Bast , P. Benthem , R. Beukema , R. Blaauw , W. J. G. de Blok , M. Bouwhuis , R. H. van den Brink , L. Connor , A. H. W. M. Coolen , S. Damstra , G. N. J. van Diepen , R. de Goei , H. Dénes , M. Drost , N. Ebbendorf , B. S. Frank , D. W. Gardenier , M. Gerbers , Y. G. Grange , T. Grit , A. W. Gunst , N. Gupta , M. V. Ivashina , G. I. G. Józsa , G. H. Janssen , A. Koster , G. H. Kruithof , S. J. Kuindersma , A. Kutkin , D. M. Lucero , Y. Maan , F. M. Maccagni , J. van der Marel , A. Mika , J. Morawietz , H. Mulder , E. Mulder , M. J. Norden , A. R. Offringa , L. C. Oostrum , R. E. Overeem , Z. Paragi , H. J. Pepping , E. Petroff , D. J. Pisano , A. G. Polatidis , P. Prasad , J. P. R. de Reijer , J. W. Romein , J. Schaap , G. W. Schoonderbeek , R. Schulz , D. van der Schuur , A. Sclocco , J. J. Sluman , R. Smits , B. W. Stappers , S. M. Straal , K. J. C. Stuurwold , J. Verstappen , D. Vohl , K. J. Wierenga , E. E. M. Woestenburg , A. W. Zanting , J. Ziemke

A Comparative Analysis To Deal With Missing Spectral Information Caused By RFI In Cosmological HI 21CM Observations

We investigate the effect of radio-frequency interference (RFI) excision in estimating the cosmological \hi\ 21 cm power spectrum. Flagging of RFI-contaminated channels results in a non-uniform sampling of the instrumental bandpass…

Cosmology and Nongalactic Astrophysics · Physics 2022-04-27 Arnab Chakraborty , Abhirup Datta , Aishrila Mazumder

Using Multiple Beams to Distinguish Radio Frequency Interference from SETI Signals

The Allen Telescope Array is a multi-user instrument and will perform simultaneous radio astronomy and radio SETI (search for extra-terrestrial intelligence) observations. It is a multi-beam instrument, with 16 independently steerable…

Instrumentation and Methods for Astrophysics · Physics 2013-09-17 G. R. Harp

1/f Noise Analysis for FAST HI Intensity Mapping Drift-Scan Experiment

We investigate the 1/f noise of the Five-hundred-meter Aperture Spherical Telescope (FAST) receiver system using drift-scan data from an intensity mapping pilot survey. All the 19 beams have 1/f fluctuations with similar structures. Both…

Instrumentation and Methods for Astrophysics · Physics 2021-10-13 Wenkai Hu , Yichao Li , Yougang Wang , Fengquan Wu , Bo Zhang , Ming Zhu , Shifan Zuo , Guilaine Lagache , Yinzhe Ma , Mario G. Santos , Xuelei Chen