Baudline
From setiquest wiki
The baudline signal analyzer is a scientific visualization tool that is made by User:SigBlips. It is a free X11 based software application that runs on many Unix operating systems including FreeBSD, Linux, Mac OS X, and Solaris.
Baudline uses the standard input[1] file descriptor to stream in and collect the quadrature[2] setiQuest Data. Many DSP operators and transforms[3] including Autocorrelation can be used to analyze the data in real-time. Baudline has various display windows for visualizing the data and numerous tools for making accurate measurements. The Play Deck[4] can be used to listen to the signal and apply a variety of audio effects and filters.
Baudline can also be remote X11 displayed over a network natively or with ssh -X.
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Operational modes
Baudline's state is in one of these three modes of operation:
- Record (collect audio or standard input, tone generator ouput)
- Pause (browse, measure, scroll, zoom, select, load or save files)
- Play (produce audio or standard output, apply real-time filters and DSP effects)
Trailblazing
- Baudline was the first third-party (non-SETI Institute) software to analyze the setiQuest data back in April 2010.[5]
- Baudline was the first to discover the Kepler-exo4 FSK signal, measure it, and demodulate it.[6].
- Baudline was the first app to find and measure the Voyager probe's drifting weak signal.[7]
- Baudline was the first to look at and analyze the entire 4 TB setiQuest data archive.
Tutorials
- http://baudline.blogspot.com/2010/05/setiquest-tutorial.html
- http://www.youtube.com/watch?v=BIl8zjX7vGQ
The data can be fed into the baudline with the following command line:
- cat *.dat | baudline -stdin -format s8 -channels 2 -quadrature -samplerate 8738133
See also
References
- ↑ http://baudline.com/manual/options.html#stdin
- ↑ http://baudline.com/manual/options.html#quadrature
- ↑ http://baudline.com/manual/channel_mapping.html#channel_mapping
- ↑ http://baudline.com/manual/play_deck.html#play_deck
- ↑ http://setiquest.org/forum/topic/baudline-analysis-amc-07
- ↑ http://setiquest.org/forum/topic/baudline-analysis-kepler-exoplanet-4
- ↑ http://setiquest.org/forum/topic/baudline-analysis-voyager
