Release Notes

Version 1.1.3.2

• Applied a fix for the course FIFO phase jumps in the core.c FEngineC2/3 functions.

Version 1.1.3.1

• Re-fixed a bug in the complex functions in lsl.correlator._spec and lsl.correlator._stokes that caused the negative frequencies in odd-sized FFTs to be unpacked incorrectly

Version 1.1.3

• Fixed a bug in the complex functions in lsl.correlator._core, lsl.correlator._spec, and lsl.correlator._stokes that caused the negative frequencies in odd-sized FFTs to be unpacked incorrectly
• Updated the tai-utc.dat file for the upcoming leap second in December 2016
• Changed the Earth orientation parameters data source to the IERS FTP server

Version 1.1.2

• Fixed a bug in the lsl.reader.ldp.TBWFile class that caused the wrong start time to be returned in some cases
• Fixed a missing import statement in tbnSpectra.py that caused the script to fail when a metadata tarball as passed in on the command line
• Updated the lsl.writer.fitsidi module to be more efficient
• Updated the lsl.writer.uvfits module to be more efficient
• Updated the lsl.imaging.utils.CorrelatedMS function to work with MeasurementSets stored inside a tarball
• Small change to lsl.correlator.uvUtils.computeUVW to make it faster for large frequency arrays
• Added ‘memmap’ and ‘clobber’ keywords to the various lsl.writer modules to expose a consistent interface
• Small fix in imageIDI.py to make it work with CASA MeasurementSets
• Transitioned to the native C complex type for the various C extensions
• Added better support VDIF files in the lsl.reader.vdif module
• Added a ring buffer for VDIF files to the lsl.reader.buffer module
• Added support for single tuning beam SDFs
• Fixed a couple of bugs that caused FITS IDI files to have invalid uvw coordinates
• Added an option to imageIDI.py to show the time in UTC instead of LST
• Updated the LWA1 SSMIF to the 7 July 2016 version

Version 1.1.1

• Fixed a bug in the lsl.statistics.robust.checkfit function
• Fixed a few modules that caused problems with automatic recasting in newer versions of NumPy
• Cleaned up the lsl.misc.dedispersion.delay() function so that it will work with lists of single frequency values
• Small fix to the lsl.imaging.selfCal module to make it more robust when not all antennas are present
• Updated the updateLSLSSMIF.py script to use the new LWA1 SSMIF location on the archive
• Added new ionosphere model sources to the lsl.misc.ionosphere module
• Changed the disk caching to lsl.misc.ionosphere to store only gzipped files
• Added options for other model sources to getIonosphericRM.py
• Fixed a bug in correlateTBW.py/correlateTBN.py that causes the script to usually write out an Extended IDI file
• Fixed a bug in splitSession.py that caused the script to crash
• Updated the various FITS-based writers to remove the old PyFITS API that is no longer supported

Version 1.1.0

• Updated the lsl.imaging.deconv module to include a source-based CLEAN method and a forward-modeling/least squares method
• Added support for phase centers other than zenith to the various functions in lsl.imaging.overlay
• Added support for determining coordinates for images with phase centers other than zenith to the lsl.imaging.utils module
• Added a new image analysis module, lsl.imaging.analysis, that allows one to find point sources in a 2-D image
• Added backward compatibility for older metadata tarball formats to the lsl.common.metabundle module (Ticket #61)
• Added preliminary support for working with circular polarizations in the correlator (lsl.correlator.fx) and imaging (lsl.imaging.utils) modules
• Added an option of imageIDI.py to overlay a topocentric graticle rather than a equatorial one
• Added better support for non-linear polarizations to imageIDI.py
• Added support for retrieving the file start time in samples to the various lsl.reader.ldp.LDPFileBase sub-classes
• Removed the lsl.misc.mathutil.robustmean() function in favor of lsl.statistics.robust.mean()
• Added a function to the lsl.astro module to help deal with correcting a celestial coordinate for nutation
• Added support for image weighting and tapering with the new lsl.imaging.utils.ImgWPlus class
• Switched lsl.imaging.utils.buildGriddedImage() over to using the new ImgWPlus class
• Added a new RadioEarthSatellite class to lsl.sim.vis help with simulating satellites that may be transmitting within the observing band
• Added the lsl.misc.ionosphere module to help with computing the dispersion and rotation measure of the ionosphere
• Added a new script, getIonosphericRM.py, that uses the lsl.misc.ionosphere module to estimate the rotation measure during an observation
• Added a new VDIF reader
• Improved the speed of the 4-bit TBW, TBN, and DRX reads through look-up tables
• Improved support for UVFITS files written by AIPS
• Added multiple integration selection to the various readers in lsl.imaging.utils
• Added support for phase centers other than zenith in the FITS-IDI writer
• Made the ‘phaseCenter’ keyword in lsl.correlator.fx.FXMaster and lsl.correlator.fx.FXStokes more flexible by allowing other data types
• Switched the various CorrelatedData readers in lsl.imaging.util to only using the metadata for building the station information

Older Versions

Version 1.0.3

• Fixed a bug in the inspectTarball.py script that caused it to crash on TBN/TBW metadata
• Added fallbacks to lsl.misc.geodesy to use a backup EOP server if the primary is unreachable
• Fixed a bug in imageIDI.py that caused it to crash if a FITS image is not saved
• Added a new module, lsl.misc.rfutil, to help with understanding commercial antenna properties
• Moved the calculateSEFD() function out of lsl.sim.vis and into lsl.misc.rfutil
• Changed the meaning of the ‘ForceGaussian’ keyword in lsl.sim.vis.buildSimArray to contain the Gaussian full widths at half maximum in degrees
• Added Boltzmann’s constant to lsl.common.constants
• Added a ‘color’ keyword to the various functions in lsl.imaging.overlay to change the color of the overlay
• Added a ‘marker’ keyword to the lsl.imaging.overlay.source() to change symbol of the source overlay
• Added a function to lsl.statistics.robust to help estimate the mode of a data set using the half-sample method
• Fixed the __all__ declaration in the lsl.writer.sdfits module
• Fixed a bug in the lsl.common.progress.ProgressBarPlus class that caused the time estimates not to get updated when using __iadd__
• Fixed a bug in the splitSession.py script that caused it to die on truncated data files (Ticket #60)
• Fixed a bug in imageIDI.py that assumed that ‘xx’ was always present in the data
• Fixed a bug in the lsl.reader.ldp.DRXFile class that caused the tuning frequencies to be reported wrong by getInfo()
• Changed how the lsl.reader.ldp.*.readFrame() functions interact with the time tag checker
• Fixed the ranging of phases coming out of the lsl.imaging.selfCal module
• Added ‘axis’ and ‘dtype’ keywords to the various statistical functions in lsl.statistics.robust and lsl.misc.mathutil to make the functions more compatible with their numpy counterparts
• Added ‘boundary’ and ‘fill_value’ keyword to the lsl.misc.dedispersion.incoherent() function to make it clear how the time boundary is handled
• Added options to the imageIDI.py script to make it easy to change which dipoles are used for imaging
• Added an option to the correlateTBW/correlateTBN scripts to correlate all dipoles, regardless of status in the SSMIF
• Fixed a bug in lsl.imaging.utils.CorrelatedData() that makes the IOErrors more transparent
• Added a deprecation warning to the lsl.misc.mathutil.robustmean() function since it will be removed in 1.1.x
• Added options to the splitSession script to give better control over the output
• Added options to the possm script that makes it behave more like imageIDI
• Fixed a problem in the lsl.imaging.deconv module when computing the positions of RadioFixedBody instances
• Fixed a bug in the lsl.sim.vis.buildSimArray() function that caused the simulation array date not to match the input if ‘jd=None’
• Fixed a bug in the lsl.sim.vis.buildSimData() function that caused the wrong antenna gain pattern to be applied
• Fixed a bug in the lsl.imaging.utils module that causes the AntennaArray instances returned by the CorrelatedData readers to be out-of-order in some cases
• Cleaned up the DR spectrometer reader so that file alignment is not lost when a syncError is raised

Version 1.0.2

• Added documentation for LDP to the Sphinx build system
• Added a call to close() for the data dictionary used in lsl.sim.vis.buildSimArray
• Fixed a version number regression in lsl.correlator.fx
• Added a call to close() for the data dictionary used in lsl.skymap.SkyMapGSM

Version 1.0.1

• Added an option to updateLSLSSMIF.py to update the LWA1 SSMIF using a local file
• Fixed a build problem on OS X with Python 2.7
• Added support for using PyFFTW in the lsl.misc.dedispersion module
• Added support for using PyFFTW in the lsl.correlator.filterbank module
• Fixed a sign problem in the rewritten lsl.skymap.ProjectedSky class that caused the sky to invert in azimuth
• Added support for FFTW wisdom
• Switched the various C extensions over to used the floating point version of FFTW
• Changed the name of the lsl.stations.LWAStation method for finding the distance and direction to another point on surface of the Earth from ‘getPointingAndDirection’ to ‘getPointingAndDistance’
• Updated the lsl.misc.gaussparams function to imporve the 2-D fits
• Removed the requirement for a BANDPASS table in the lsl.imaging.utils.CorrelatedDataIDI class
• Reworked the lsl.reader.ldp module to provide a more object oriented way to access data files
• Fixed a packing bug in the lsl.sim.drx.frame2frame function
• Fixed a bug in lsl.imaging.utils.CorrelatedDataUV that cause getDataSet to always return all data
• Fixed the baseline ordering in FITS IDI files that use the stand number mapper
• Updated the FITS IDI reader to use the UVFITS scheme for determining baseline sets
• Major overhaul of the lsl.sim.vis module to use a new C-based simulation extension instead of AIPY
• Fixed a bug in lsl.correlator.fx that caused the number of overlapped FFTs to be calculated incorrectly
• Fixed a bug in lsl.correlator.fx.FXMaster/FXStokes that caused the last FFT window to be excluded from the integration
• Removed the lsl.correlator.fx.SpecMasterP function
• Updated the lsl.imaging.utils module to better deal with sparse FITS IDI/UVFITS files
• Added support for the new MCS beam-dipole mode via the SDF keyword OBS_BDM
• Various fixes to the lsl.imaging.deconv module
• Added a plotting helper function to lsl.imaging.utils
• Added a new overlay module for images called lsl.imaging.overlay
• Fixed several bugs in lsl.sim.vis and lsl.imaging.utils related to single-channel data sets
• Added an option to export the images created to imageIDI.py to a FITS image file
• Small bugfix to the lsl.writer.tsfits module with regards to processing DRX frames
• Cleaned up the setup.py script to uses NumPy’s internal facilities to identify ATLAS
• Updated the list of dependencies to include pytz
• Added the ‘iauConvention’ keyword to the lsl.misc.beamformer.circularize() function
• Added a few new convenience functions to the lsl.reader.drspec module
• Added ‘lwavl’ as an alias to ‘lwa1’ in the lsl.common.stations module
• Added methods to return the response curves of the FEE and Cable to the lsl.common.stations module
• Fixed a bug in lsl.imaging.utils.CorrelatedData() that caused IOErrors to be get masked

Version 1.0.0

• Added in LWA Development Primitives module (lsl.reader.ldp)
• Added a function to lsl.misc.beamformer to convert X and Y linear pols. to circular L and R pols
• Removed the lsl.correlator.visUtils module since it isn’t used by any other modules or scripts
• Switched the lsl.correlator modules over to returned all ‘LFFT’ channels
• Replaced the Fermi first point source catalog with the 2-year catalog
• Dropped libnova in favor of PyEphem for the backend to the lsl.astro module
• Modified skymap.ProjectedSkyMap to not rely on the lsl.astro_array module
• Removed the lsl.astro_array module
• Removed the lsl.libnova module and the associated swig file
• Updated the documentation to reflect the reduced dependencies
• Update lsl.common.stations.LWAStation to be a sub-class to ephem.Observer
• Added a function to lsl.common.stations.Antenna to access information about the impedence mis-match
• Added an option to the various response functions in lsl.common.stations to return values in dB
• Switch the information/SSMIF for the north arm site to lwana instead of lwa2 to avoid confusion with the SV site
• Renamed the lsl.common.stations.LWAStation.getECEFTransform() function to getECITransform() to reflect what is really happening
• Added a function to lsl.imaging.utils to make it easy to re-phase a data dictionary to a new pointing center
• Added new functions to the LWAStation class to deal with direction and distance to other stations/points on the Earth
• Generalized the computeUVW() and computeUVTrack() functions
• Added a disk-based cache to the lsl.misc.geodesy module to help keep network traffic down
• Added support for reading and writing UVFITS files
• Added support for reading CASA measurement sets via pyrap
• Added a function to rephase a visibility data dictionary to a new pointing center
• Improved the visibility simulation speed in lsl.sim.vis
• Added try...except blocks to lsl.common.metabundle to clean up after failed functions
• Added append() functions to Project and Session in lsl.common.sdf to make it easier to add sessions and observations
• Added a setSpectrometerMetatag() function to lsl.common.sdf.Session to make setting the metatag easier
• lsl.common.sdf.Project.render() now calls update() to make sure everything is up-to-date before rendering
• Added ‘verbose’ keywords to lsl.imaging.utils.buildGriddedImage() and the lsl.imaging.selfCal functions
• Added a ASCII busy indicator for long running tasks
• Added a script to make it easier to update the internal LWA1 SSMIF used by LSL

Version 0.6.6

• Fixed a problem with older NumPy installs not having a close() function
• Fixed a bug in the splitTBN.py and splitDRX.py scripts when a ‘count’ is not provided
• Fixed the try...except blocks in lsl.statistics.kurtosis.getLimits() to catch the appropriate error
• Improved the end buffering the in lsl.misc.dedispersion.coherent() function
• Updated the LWA1 SSMIF to the 131031 version
• Fixed a typo in the help for correlateTBN.py

Version 0.6.5

• Fixed the time remaining computation in lsl.common.progress.ProgressBarPlus
• Fixed a bug in imageIDI.py that caused the LST not to update on subsequent integrations
• Added in a call to close() after numpy.load() is used
• Updated the setup.py script to help deal with clang/OpenMP on OSX
• Updated the lsl.common.metabundle module to deal with the new _metadata.txt file format
• Added a method to read in MCS MIB files in the GDBM format
• Added new functions to lsl.common.metabundle to retrieve the ASP configuration from a new metadata tarball

Version 0.6.4

• Cleaned up the coherent part of the dedispersion module
• Added a time estimating progress bar to lsl.common.progress
• Fixed the data scaling in the SoftwareDP _processStreamFilter() function
• Fixed the integration time stored in the FITS IDI files generated by correlateTBW.py
• Added validation for the DR spectrometer channels/integration count/mode in an SDF
• Fixed a couple of typos in the DR spectrometer reader that mixed the I-only and Q-only output modes
• Fixed the ‘fills’ normalization in the DR spectrometer reader for the YX-only, YY-only, XX/YY, and XX/XY/YX/YY modes
• Fixed the axis order in the SDFITS writer

Version 0.6.3

• Fixed a typo. in lsl.imaing.utils.pruneBaselineRange() function
• Added normalization by the transform length to the lsl.reader._gofast module
• Added back in the “import lsl; lsl.test()” fixture
• Updated the plotUVcoverage.py script to work with all 260 stands
• Fixed the data volume computation for lsl.common.sdf.Stepped observations
• Updated the imageIDI.py script to work with either correlated TBW or TBN files
• Reorganized the scripts to better handle metadata and removed the IOC scripts
• Changed the default values of SESSION_LOG_SCH and SESSION_LOG_EXE in lsl.common.sdf to False
• Fixed the lsl.common.sdf.Stepped class so that the step lists of independent
• Added the pointing correction keywords to the binary SSMIF reader
• Fixed a bug in the calculation of cable delays
• Fixed the order of the optional SESSION_* keywords in the SDF renderer
• Updated the SDF parser to better work with SDFs that contain custom beamforming
• Added convenience functions to the lsl.common.mcs module to help pack delays and gains for custom beamforming SDFs
• Updated the included LWA1 SSMIF to the March 10, 2013 version
• Added support for phase offsets to the lsl.sim.vis.scaleData() function
• Improved the lsl.imaging.selfCal module by added in new methods
• Fixed the decimation values for the TBN and DRX CIC filters

Version 0.6.2

• Fixed a bug in splitDRX.py that caused the script to die if an –offset was passed in
• Fixed a bug in lsl.common.mcs that caused binary packed files to be read in incorrectly on 32-bit installs
• Fixed a bug in lsl.misc.beamformer that caused the beam simulators to fail when running in single-thread mode
• Added frequency keywords to the integer delay-and-sum beamformer functions
• Fixed a problem with the beam power pattern measured by lsl.misc.beamformer.intBeamShape
• Overhaul of the lsl.common.sdf module to address Ticket #40 (OBS_DRX_GAIN problem) and to improve the render
• Removed jinja2 as a dependency
• Fixed a bug in lsl.common.sdf dealing with parsing LST times
• Added the inspectTarball.py script
• Added an option to the lsl.imaging.utils.CorrelatedData class to only return baselines in a certain uv range
• Updated the LWA1 SSMIF to the 2013/1/23 version to include the LEDA outriggers

Version 0.6.1

• Added support for DROS metatags in the SESSION_SPC SDF keyword

Version 0.6.0

• Removed the correlator.fx.calcSpectra()/calcSpectrum() functions
• Removed the lsl.common.warns module
• Removed the LWAFS-specific modules since they are not needed for the new DROS v2
• Updated the DR spectrometer reader (lsl.reader.drpsec) for the new DROS v2

Version 0.5.5

• Added in the pointing correction rotation code to lsl.common.mcs as applyPointingCorrecton()
• Made the visibility simulations consistent with the output of lsl.correlator.fx.FXMaster()
• Added a new lsl.writer.fitsidi.ExtendedIDI class to deal with more than 255 antennas
• Updated lsl.imaging.utils to deal with the new ExtendedIDI class
• Added in the self-calibration routines to lsl.imaging.selfCal
• Updated the LWA1 and LWA2 SSMIFs
• Fixed the observatory/instrument specific header values in lsl.writer.fitsidi so that they reflect the different sites
• Updated lsl.misc.dedispersion.coherent() to deal with the padding better

Version 0.5.4

• Switched over to transparent compression in the lsl.common.metabundle functions
• Added support for ‘/’ seperated YYYY/MM/DD in lsl.common.sdf.parseTimeString()
• Removed the ‘return’ values from the _gofast module import call
• Various cleanups in the C extentions to remove compile time warnings
• Tweaked the splitDRX.py script to be more robust
• Added support for libnova version 0.15.0
• Improved support for STEPPED observations in lsl.common.sdf
• Made the TBW read-out duration calculation consistent with the current version of MCS
• Changed the allowed TBN tuning from 10 to 88 MHz to 5 to 93 MHz
• Tweaked lsl.common.beamformer.phaseAndSum() to automatically exclude bad stands
• Removed a testing block from lsl.common.beamformer.intDelayAndSum() which only sums the first 20 antennas

Version 0.5.3

• Changed the DROS spectrometer reader to match the new format
• Fixed the documentation for the various correlator.fx spectra functions
• Updated the sphinx documentation to address Ticket #25
• Added the session splitting script to IOC to address Ticket #24
• Changed lsl.common.mcs.mjdmpm2datetime() to return naive datetime instances (Ticket #26)
• Fixed a bug in lsl.common.sdf.Project that causes some observation non-overlaps to be reported as overlaps
• Fixed a bug in the setup.py script that caused it to crash on systems without pkg-config installed
• Modified splitDRX.py to cope with DRX data that begins with frames that list a decimation of zero
• Added support for parsing the OBS_DRX_GAIN and OBS_TBN_GAIN keywords in the SDF parser
• Cleaned up drxSpectra.py to better deal with files that have a tuning missing at the beginning or where the sample rate changes at the beginning of the file
• Added a module to lsl.misc to generate autostereograms from 2-D NumPy arrays
• Fixed a bug in lsl.misc.geodesy related to an exception that is thrown when the URL cannot be reached
• Added support for parsing LST times at LWA-1 in lsl.common.sdf.parseTimeString()

Version 0.5.2

• Fixed a bug in gatherDebugging.py that caused the script to crash on missing modules
• Fixed a bug in FEnginep[RC][23] that caused segmentation faults in Python 2.7
• Made the module path finder a little more robust
• Updated the LWA1 SSMIF to the May 16, 2012 version to include the latest antenna status codes
• Added a beamformer to lsl.common.dp.SoftwareDP
• Changed lsl.common.dp.SoftwareDP.apply() to lsl.commondp.SoftwareDP.applyFilter()
• Fixed multi-threading in the lsl.common.dp.SoftwareDP class
• Added a clock offset parameter to the cable model (lsl.common.stations.Cable)
• Cleaned up the correlateTBW.py scripts
• Fixed a bug in the correlator integer sample delays
• Fixed bugs in the lsl.misc.beamformer module related to delays
• Fixed the URL used by lsl.misc.geodesy.__loadHistoric1992()
• Added support for FreeBSD
• Added datetime <-> MJD/MPM conversion functions to lsl.common.mcs
• Converted lsl.common.progress.ProgressBar to a rotating progress bar

Version 0.5.1

• Added jinja2 to the list of install dependencies
• Fixed the segfault associated with the DR spectrometer reader
• Cleaned up how splitDRX.py offsets in a file
• Removed splitTBW.py since it is no longer needed
• Fixed a few bugs in the SDF parser dealing the logging keywords
• Modified lsl.common.metabundle.getSessionDefinition to use the SDF in the tarball rather than generate it from the session and observation specification files
• Made drxSpectra.py robust against DRX frames with decimation of zero
• Made the SDF parser more robust against single word names

Version 0.5.0

• Worked on adding better polarization support to correlator.fx and correlator.uvUtils
• Updated the correlateTBN script to make full polarization support possible
• Added a crude deconvolution routine that should work with the AIPY ImgW images
• Worked on adding in support for binary packed SSMIF files in lsl.common.stations
• Worked on adding in support for binary packed SDM files via a new lsl.common.sdm module
• Worked on adding in support for the various MCS meta-data tarball file formats
• Moved the SDF module out of SessionSchedules and into lsl.common
• Added functions to generate the TBN and DRX filter magnitude response
• Added versions of the spectra plotters, the correlations, and the stand plotters that use MCS meta-data bundles
• Added a basic SSMIF file for the north arm site (LWA-2)
• Added a preliminary module for incoherent dedispersion lsl.misc.dedispersion
• Added support for spectral kurtosis via lsl.statistics.kurtosis
• Updated the dependency list
• Cleaned up the TBN ring buffer using deques and OrderedDicts
• Added support for reading the TBN tuning word/frequency and gain from a TBN frame
• Added support for reading the DRX tuning word/frequency from a DRX frame
• Added support for stepped SDF files that specify the delays and gains to use
• Added support for ARX board/channel responses via a new common.stations.ARX class
• Removed the misc.beamformer.fftDelayAndSum functions in favor of phase-and-sum beamforming
• Fixed a problem on some platforms with Numpy/LSL version determination in gatherDebugging.py
• Cleared the post-interpreter multiprocessing/logging errors during ‘test’
• Added support for the DR spectrometer output data format
• Added support for computing Stokes parameters from timeseries data
• Removed deprecated and unused functions from lsl.correlator.fx
• Added support for computing Stokes parameters in the FX correlator and fixed the FITS IDI writer to save the data
• Removed S60 reader/simulator
• Reworked the SDFITS writer to make it more like the FITS IDI writer

Version 0.4.5

• Tweaked how the averaging in drxSpectra and tbnSpectra is performed
• Upgraded the lsl.reader.drsu module to work with larger file count LWAFS
• Added a ls-style script, lsDRSU.py, to list the contents of a DRSU
• Added a glob-style function to the DRSU module
• Added an array-geometry correction to the correlator to phase up on zenith
• Updated the dependency list
• Added ARX channel mapping information to lsl.common.stations.Antenna instances
• Added a new versioning system to make it easier to access the LSL version in python
• Fixed a mapping problem in plotStands.py that mapped by digitizer, not stand
• Added a gatherDebugging.py script alongside setup.py to help with debugging and installation problems
• Moved gatherDebugging.py to the script directory to have it installed with LSL
• Added ‘documentation support’ for accessing the central frequency of a DRX frame
• Fixed a RPD_DD mapping problem in lsl.common.stations.parseSSMIF()
• Fixed a DP1_SLOT parsing problem in lsl.common.stations.parseSSMIF()
• Updated LWA-1 SSMIF to 12/26/2011 to include calibration information
• Added the June 30, 2012 leap second into the TAI-UTC file
• Fixed a problem in cpDRSU.py with the verbose output
• Cleaned up the ‘sfdisk’ calls with the DRSU direct-access module
• Added a BeamAlm class to lsl.sim.vis to help with polarization difference between LWA1 and what is implemented in AIPY

Version 0.4.4.1

• Fixed the missing cable attenuation parameters in the SSMIF

Version 0.4.4

• Added an id number attribute to lsl.common.stations.FEE objects
• Updated LWA-1 SSMIF to 2011-08-10 version
• Added ‘keep’ option to tbnSpectra.py to only display a certain collection of stands
• Possibly cleared up a install problem on some systems that prevents testing
• Fixed various memory leaks in the readers and the direct DRSU access module
• Added ‘documentation support’ for accessing the central frequency of a TBN frame
• Added support for variable noise level in the various lsl.sim.dp functions
• Worked on improving ATLAS library detection on Redhat-based distributions
• Improved detection of potential build problems with the DRSU direct-access extension
• Updated the coordinates of stand #148 to be consistent with the revised LWA-1 survey
• Fixed the digitizer to board mapping to account for DP2 boards
• Fixed a bug simulating visibilities that could include sources below the horizon
• Fixed the ‘-i’ option in gsmnpz2map.py

Version 0.4.3

• Cleaned up the various __init__.py scripts
• Fixed a few typos in lsl.correlator.uvUtils
• Fixed a typo in the progress bar caused some decrements to increment
• Fixed a few typos in lsl.correlator.uvUtils.computeUVTrack
• Fixed a typo in the _spec.PPSDC2() function that caused it to die
• Fixed several heinous problems in sim.dp.pointSource()
• Fixed a bug with indexing in the 4-bit TBW reader
• Fixed a few sign errors in correlator _core and uvUtils modules
• Fixed a bug in the correlateTBW script related to antenna indexing
• Fixed a bug in the FITS IDI writer that caused EOP problems to be fatal

Version 0.4.2

• Fixed tbwSpectra.py to skip over non-TBW frames at the beginning of a TBW file
• Fixed the common.stations.geo2ecef() conversion function (Ticket #16)
• Fixed the correlator.fx.FXMaster() function (Ticket #18)
• Fixed a few type conversion problems in correlator._core (core.c) introduced with the new data types
• Fixed a frequency units conversion in tbnSpectra.py
• Improved polarization support in the FITS IDI writer
• Fixed a sign error in the fractional delay correction of the correlator F engine
• Improved the speed of the X Engine
• Fixed a azimuth definition problem in astro_array.c
• Updated the included SSMIF to the 5/18/2011 version
• Updated the correlateTBN script to make computing XX and YY products easier
• Added support for different cable attenuation models supported in MCS0031, v5
• Added support for the old 20-stand prototype system through lsl.common.stations.prototypeSystem
• Updated the correlateTBW script to make computing XX and YY products easier
• Updated SSMIF with new stretch and cable gain coefficients
• Added support for time-domain blanking via the ‘ClipLevel’ keyword to various _spec and _core routines

Version 0.4.1

• Fixed a problem with the C readers that manifests itself on 32-bit platforms
• Modified sphinx to be more independent about version numbers and release notes
• Added additional PyDict checks to the _gofast module
• Modified lsl.sim.drx to zero the frame and seconds counts to make the DRX frames ICD compliant
• Fixed a small bug in lsl.sim.tbw/tbn/drx that caused the seconds counts to be wrong

Version 0.4.0

• Added new robust statistical methods
• Added Global Sky Model models to skymap
• Added new smoothing and fitting functions to misc.mathutil
• Added a progress bar for use with long-running applications
• Added in new LWA-1 dipole NEC models
• Re-worked the plotAntenna.py script to use the pre-computed dipole response fits
• Added support for EXCITATION keywords in misc.nec_util
• Added new gofast readers for TBW, TBN, and DRX
• Added better polyphase filter support
• Fixed initialization problems the various lsl.reader Frame objects
• Fixed the TBN ring buffer
• Added support for simulating point sources in TBW and TBN data
• Moved the tests directory out of lsl proper
• Added new offset/average options to drxSpectra and tbnSpectra
• Added new DRSU direct access module for Linux system (experimental)
• Added documentation for the various C extensions
• Updated the dependencies list to capture everything needed for the extensions

Version 0.3.4.2

• Fixed a couple of typos. in the correlator scripts
• Added more colors to tbwSpectra.py so that all 20 inputs can be plotted
• Fixed problems with DRX frame attributes
• Fixed filter code problems in the DRX writer
• Fixed typo in URL for libnova
• Added a brief tutorial for DRX data
• Fixed a problem determining if a TBW chunk has enough samples to FFT

Version 0.3.4.1

• Fixed various documentation problems

Version 0.3.4

• Added in the new cable attenuation model
• Re-wrote the TBW reader so that is it ~40% faster
• Removed unnecessary “import” statements in the TBW, TBN, and DRX readers
• Fixed slow frame creation by sim.dp on 64-bit systems
• Added in the new C-based correlator
• Major re-organization of correlator.fx with regards to windowing functions
• Switched from ‘processing’ to ‘multiprocessing’
• Added the possm.py script for each FITS IDI examination
• Fixed tbwSpectra.py and tbnSpectra.py to accommodated the windowing change
• Added drxSpectra.py
• Fixed various problems with the DP data simulator
• Added in option to cable losses in tbwSpectra.py
• Fixed a problem in the sim.vis.Antenna class function get_beam_shape
• Added in a correlator script for TBW
• Added new beam models for use with AIPY based on SLC0015

Version 0.3.3

• Fixed stand indexing error in uvUtils.cableAttenuation
• Fixed Mac OS X tbnSpectra.py plotting problem (Ticket #3)
• Spectra generated by tbwSpectra.py and tbnSpectra.py now agree with IDA v0.1
• Fixed problems with the frame comparison attributes
• Re-wrote the TBN reader so that it is ~20% faster
• Fixed syntax errors in misc.difxconfig
• Fixed MemoryError problem for some systems with tests.test_vdiff (Ticket #7)
• Fixed a problem that caused some systems to assume that LSL was zip safe
• Added new stand mappings that correct the 3/4 pair swaps

Version 0.3.2

• Added new “tutorial” style documentation for various parts of LSL
• Added scripts tbwSplit.py and tbnSplit.py to split large TBW and TBN files down to more manageable sizes

Version 0.3.1

• Fixed various typos. in correlator.fx, misc.beamformer, and reader.buffer
• Added “close” function to writer.fitsidi

Version 0.3.0

• New setuptools-based build system
• New, improved documentation
• Added post-acquisition beam forming module
• Added in modules for writing simulated data to the S60, TBW, TBN, and DRX raw data formats
• Added a module for simulated basic test signals in TBW, TBN, and DRX data
• Moved the lwa_user script ‘astrostatus.py’ into the scripts directory
• Fixed the FITS IDI writer
• Fixed a couple of bugs dealing with incorrect chunking of data in scripts/tbwSpectra.py and scripts/tbnSpectra.py

Version 0.2.0

• Added in other modules from the lwa_user library developed by NRL

Version 0.1.0

• Initial version