* This release adds support for .sdfits files that are used in Parkes data reduction and has various little enhancements. Strategy file format has not changed.
* This release adds support for .sdfits files that are used in Parkes data reduction and has various little enhancements. Strategy file format has not changed.
* New feature: Parkes' sdfits files can now be opened (with help from J. Delhaize) and the AOFlagger seems to be able to flag such observations well
* New feature: Parkes' sdfits files can now be opened (with help from J. Delhaize) and the AOFlagger seems to be able to flag such observations well
* New feature: Save flags action can store flags to sdfits files
* New feature: Save flags action can store flags to sdfits files
* New feature: New spectrum plot options in Rfigui (plot mean or sum of time steps)
* New feature: New spectrum plot options in Rfigui (plot mean or sum of time steps)
* New feature: binary 'badstations', will use quality statistics to determine bad stations. Meant to be a fast tool for LOFAR data.
* New feature: binary 'badstations', will use quality statistics to determine bad stations. Meant to be a fast tool for LOFAR data.
* New feature: allow reading non-standard columns in the gui (requested by R. van Weeren)
* New feature: allow reading non-standard columns in the gui (requested by R. van Weeren)
* New feature: new action 'Normalize variance', observations can be normalized by using the quality statistics.
* New feature: new action 'Normalize variance', observations can be normalized by using the quality statistics.
* Bug fix: Sinc convolution in time direction can now be accomplished with FFT
* Bug fix: Sinc convolution in time direction can now be accomplished with FFT
* Bug fix: Added many improvements to the aoqplot quality plotting tool, i.e., better error msgs, more plots, bandpass/time correction, less crashes.
* Bug fix: Added many improvements to the aoqplot quality plotting tool, i.e., better error msgs, more plots, bandpass/time correction, less crashes.
* Bug fix: No longer silently ignoring write errors during reordering -- before this, when writing failed, flag results were wrong without warning.
* Bug fix: No longer silently ignoring write errors during reordering -- before this, when writing failed, flag results were wrong without warning.
* Enhancement: more options for aoquality tool.
* Enhancement: more options for aoquality tool.
* Bug fix: The uvfits reader did not work any more on WSRT files because of architectural changes in the AOFlagger. Fixed.
* Bug fix: The uvfits reader did not work any more on WSRT files because of architectural changes in the AOFlagger. Fixed.
* Bug fix: AOFlagger can now flag data without time stamps (wich allows me to flag data from my personal hobby telescope).
* Bug fix: AOFlagger can now flag data without time stamps (wich allows me to flag data from my personal hobby telescope).
* Bug fix: Open button now has key accelerator.
* Bug fix: Open button now has key accelerator.
* Bug fix: AOFlagger did not compile on gcc 4.7 (reported by J. Swinbank).
* Bug fix: AOFlagger did not compile on gcc 4.7 (reported by J. Swinbank).
* Bug fix: Toolbar in the Rfigui will now always show both text and icons
* Bug fix: Toolbar in the Rfigui will now always show both text and icons
* Bug fix: Interface changed to allow NDPPP to read the raw data, NDPPP's problems fixed that concerned quality collecting.
* Bug fix: Interface changed to allow NDPPP to read the raw data, NDPPP's problems fixed that concerned quality collecting.
* Performance enhancement: Improved speed of horizontal sumthreshold algorithm with SSE instructions, leading to about 10\% improved speed on overal strategy.
* Performance enhancement: Improved speed of horizontal sumthreshold algorithm with SSE instructions, leading to about 10\% improved speed on overal strategy.
* Bug fix: fixed bug in previously mentioned new SumThreshold algorithm causing crashes (reported by J. Swinbank), also adding test case to validate result.
* Bug fix: fixed bug in previously mentioned new SumThreshold algorithm causing crashes (reported by J. Swinbank), also adding test case to validate result.
* Performance enhancement: Improved performance of reading meta data of measurement sets.
* Performance enhancement: Improved performance of reading meta data of measurement sets.
* Experimental additions: the frequency filters are now optimized and can be applied on huge (LOFAR) observations.
* Experimental additions: the frequency filters are now optimized and can be applied on huge (LOFAR) observations.
<p>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.</p>
<p>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.</p>
<p>The tools in the package are meant for offline use. The software package contains a graphical interface ("<tt>rfigui</tt>") that can be used to visualize a measurement set and analyze mitigation techniques. It also contains a console flagger ("<tt>rficonsole</tt>") that can execute a script of mitigation functions without the overhead of a graphical environment. All tools were written in C++.</p>
<p>The tools in the package are meant for offline use. The software package contains a graphical interface ("<tt>rfigui</tt>") that can be used to visualize a measurement set and analyze mitigation techniques. It also contains a console flagger ("<tt>rficonsole</tt>") that can execute a script of mitigation functions without the overhead of a graphical environment. All tools were written in C++.</p>
<p>The software has been tested extensively on low radio frequencies (150 MHz or lower) produced by the <ahref="http://www.astron.nl/radio-observatory/astronomers/wsrt-astronomers">WSRT</a> and <ahref="http://www.lofar.org">LOFAR</a> telescopes. For this purpose, I'm reasonably sure that it is both the <em>fastest</em> and <em>most accurate</em> flagger in the world. LOFAR is the Low Frequency Array that is built in and around the Netherlands. Higher frequencies have been tested as well. Some of the methods implemented are the <tt>SumThreshold</tt>, the <tt>VarThreshold</tt>, the <tt>Scale-Invariant Rank Operator</tt> and the singular value decomposition (SVD) method. Included also are several surface fitting algorithms.</p>
<p>The software has been tested extensively on many radio telescopes, especially on but not limited to low radio frequencies (150 MHz or lower) produced by the <ahref="http://www.astron.nl/radio-observatory/astronomers/wsrt-astronomers">WSRT</a> and <ahref="http://www.lofar.org">LOFAR</a> telescopes. It also works on single dish radio telescopes. I believe that it is both the <em>fastest</em> and <em>most accurate</em> flagger available, which is supported by the scientific articles.</p>
<p>The software is published under the GNU General Public License version 3.</p>
<p>The software is published under the GNU General Public License version 3.</p>
<aid="download"><h4>Download</h4></a>
<aid="download"><h4>Download</h4></a>
<p>The latest version of the software can be downloaded here:</p>
<p>The latest version of the software can be downloaded here:</p>
