Radio Frequency Interference Mitigation at the Westerbork Synthesis Radio Telescope: Algorithms, Test Observations, and System Implementation
- 1 August 2004
- journal article
- Published by American Astronomical Society in The Astronomical Journal
- Vol. 128 (2) , 933-949
- https://doi.org/10.1086/422350
Abstract
The sensitivity of radio astronomical stations is often limited by man-made radio frequency interference (RFI) due to a variety of terrestrial activities. An RFI mitigation subsystem (RFIMS) based on real-time digital signalprocessing is proposed here for the Westerbork Synthesis Radio Telescope based on a powerful field programmable gate array processor. In this system the radio astronomy signals polluted by RFI are "cleaned" with the RFIMS before routine back-end correlation processing takes place. The high temporal and frequency resolution of RFIMS allows the detection and excision of RFI better than do standard radio telescope back-end configurations.Comment: 17 pages, 17 figureKeywords
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This publication has 6 references indexed in Scilit:
- RFImitigation methods in radio astronomyAstronomy & Astrophysics, 2001
- Multiculturalism and Bilingual EducationEducational Researcher, 2001
- Removing Radio Interference from Contaminated Astronomical Spectra Using an Independent Reference Signal and Closure RelationsThe Astronomical Journal, 2000
- Cancellation of GLONASS signals from radio astronomy dataPublished by SPIE-Intl Soc Optical Eng ,2000
- A New Approach to Interference Excision in Radio Astronomy: Real-Time Adaptive CancellationThe Astronomical Journal, 1998
- The response of a radio-astronomy synthesis array to interfering signalsIEEE Transactions on Antennas and Propagation, 1982