Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010ascl.soft10017o&link_type=abstract
Astrophysics Source Code Library, record ascl:1010.017
Astronomy and Astrophysics
Astrophysics
Radio-Frequency Interference, Aoflagger, Sumthreshold
Scientific paper
The RFI software presented here can automatically flag data and can be used to analyze the data in a measurement. The purpose of flagging is to mark samples that are affected by interfering sources such as radio stations, airplanes, electrical fences or other transmitting interferers. The tools in the package are meant for offline use. The software package contains a graphical interface ("rfigui") that can be used to visualize a measurement set and analyze mitigation techniques. It also contains a console flagger ("rficonsole") that can execute a script of mitigation functions without the overhead of a graphical environment. All tools were written in C++. The software has originally been developed for low radio frequencies (150 MHz or lower) produced by the WSRT and LOFAR telescopes, but has been succesfully applied on many telescopes at different frequencies. Some of the methods implemented are the SumThreshold, the VarThreshold, the scale-invariant rank (SIR) operator and the singular value decomposition (SVD) method. Included also are several signal estimation algorithms. The software is published under the GNU General Public License version 3.
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