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CHANGELOG.md

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Next version (not yet released)

  • Remove ez_setup installation infrastructure; it has been deprecated for a long time.
  • Allow installing from empty environment
  • Use github actions instead of travis
  • Use python3 print()
  • Use pytest instead of unittest
  • Use explicit numpy types

3.0.1 (2019 Aug 21)

  • Remove Astropy version cap; it was intended to promote simultaneous Python 2/3 compatibility, but if someone wants to use the newer version, that's fine too.
  • Fix a bug in the Healpix wrapper (#52).
  • Fix some lingering Python 2/3 compatibility issues (#51).
  • Honor pos_def in the 1D real CLEAN (#44)
  • Install the Helmboldt catalog data files, which were mistakenly not being included in installations (#45)
  • Rename the package directory in the source tree from aipy_src to aipy.

3.0.0rc2 (2018 Aug 27)

  • Fix generation of the package description in setup.py (#46, #47)
  • Fix division that should have become integer division (#48)

3.0.0rc1 (2018 Aug 20)

  • Make compatible with Python 3; remove scipy and healpix borrows.

2.x series

  • No changelog was maintained. Consult the Git history.

1.0.0

  • Added some performance enhancements
  • Miriad.UV files can now store data as both shorts and as float32 (avoiding dynamic range problems)
  • Various bugfixes
  • Because of stability of 0.X.X series, we've promoted this to a non-beta release!

0.9.0

  • Made some major naming changes in preparation for an AIPY publication. These include renaming aipy.ant to aipy.phs, aipy.sim to aipy.amp, aipy.loc to aipy.cal.
  • Renamed BeamFlat to just plain Beam
  • Changed the -l options (for "loc files") in scripting interfaces to -C (for "cal" files)
  • Added support in scripting interface channel selection for constructions of the form 0_10_2, meaning channels 0 to 10 (including endpoints), counting by 2.
  • Refactored code so source spectra are computed internally to RadioBodys, and are accessed through the get_jys() method. Added an update_jys() method for computing a source spectrum for specified frequencies without needing an AntennaArray object.
  • Added a get_afreqs() method to AntennaArrays to elucidate the opaque incantation; "AntennaArray.ants[0].beam.afreqs."
  • Added a system support for adding source catalogs through src.py calling catalog interfaces stored in the _srcs directory. Made the Helmboldt catalog the default catalog that AIPY comes with (since it's pretty small and geared toward low frequencies).
  • Added unit tests (in "test" directory) for the most-used modules, and will continue to add them as other modules are revisited. There is also a script called "script_battery.sh" that does basic exercising of most AIPY scripts.
  • In Antennas, grouped delay/offset into an array called phsoff which is a phase polynomial in frequency.
  • Couple of bugfixes on how objects are updated (now made explicit with "update()" methods) and fixed an array shape bug in Antenna.refract()
  • Fixed a bug in filter_src.py where data were zeroed when a source is below the horizon.
  • Transitioned all nomenclature from "Fringe-Rate" to "Delay-Rate" as per Parsons & Backer (2009) in AJ.
  • Changed how fit parameters are input in scripting module
  • Bugfix for when resolution effects are taken into account in AntennaArray.gen_phs.
  • Bugfix in xrfi.py for flagging by integration
  • Improved filtering in filter_src.py to use padding and optionally passband information.
  • Added script srclist.py
  • Added masking by wieght to plot_map.py

0.8.6

  • Fixed a data-type error for Healpix maps that aren't doubles
  • Added max/drng/cmap parameters to standard command-line options
  • Started adding unit tests
  • Changed noise option in mdlvis.py to add noise in Jy (not data) units.
  • Changed behavior of reducing NSIDE in Healpix maps to sum instead of average.
  • Bugfix on extracting source below the horizon in filter_src.py
  • Work aound problem with numpy MA arrays not having a mask if entire image is valid.
  • Added new option (0,1,2)_3 for specifying antennas on the command line.

0.8.5

  • Added support to mdlvis.py for simulating data without an input UV file.
  • Added "none" mode to xrfi.py to flag only those channels specified manually.
  • Added line to alm_wrapper.cpp to support compilation on python < 2.5.

0.8.4

  • Changed modmap.py to work with sources of nonzero angular size. Also added support for changing the data type (double,float) of a map.
  • Added parameter to mk_img.py to control minimum altitude to allow for phase center. Also added parameter for resuming interrupted faceting.
  • Fixed xrfi.py default parameter "intthresh" to avoid excessive flagging of integrations.
  • Made fitmdl.py skip fitting when there are no data. Added "snap" mode to fit parameters every integration.
  • Added text color option to plot_map.py
  • Added ionospheric refraction code using 1/freq**2 scaling. This involved some significant refactoring of code, and some changes in fitmdl.py and mdlvis.py.
  • Changed fitmdl.py to cache UV data, resulting in less time reading files. This significantly sped up code, although may become problematic with fits involving lots of data.
  • Removed some per-baseline computations in ant.py that occured every compute, even if unnecessary. Baseline projections are now computed as needed. Sped up simulations involving few baselines.
  • Bugfix to miriad "select" command involving "time" selection: double arguments were incorrectly cast as floats.
  • Made mk_map.py a little more efficient in calculating map weights.

0.8.3

  • Changed how loc-specific source parameters are implemented (now with get_catalog() instead of src_prms). Changed scripts to use this format, and scripting.parse_srcs() to return values that can feed get_catalog().

0.8.2

  • Built in decimation to UV files in miriad_wrap.cpp.
  • Added decimation selection with select() to UV files in miriad.py.
  • Bugfix on various scripts to use new clean command.

0.8.1

  • Split out cleaning functionality from mk_img.py into cl_img.py.
  • Added snapshot capability to mk_img.py
  • Bugfix for plot_img.py grid being upside-down.
  • Reimplemented clean in C for speed.

0.8.0

  • Added resolving support for elliptical sources in resolve_src() in ant.py.
  • Reworked how get_baseline() and gen_uvw() functioned to facilitate elliptical sources. This change required updating scripts that use gen_uvw().
  • Allowed specifying coordinate epochs for RadioFixedBody's
  • Changed how plot_img.py, mk_map.py work. There is now a general script mk_img.py which geberates FITS files (introduced in 0.7.1) for each specified source, or for equally-spaced phase centers around the sphere. This script is responsible for all image generation. mk_map.py now takes these FITS images as input and uses them as facet images to make a spherical Healpix map. plot_img.py is now a visualization tool (a la plot_uv.py and plot_map.py), and overlays appropriate ra/dec grids on the FITS images.
  • Flipped u/v order (and sign of v) in the Img class in img.py to be more naturally compatible with FITS image conventions. Required a change to Img.gen_LM() as well.

0.7.2

  • Added sorting to plot_uv.py to make plots in sensible baseline order.
  • Edited script documentation for plot_map.py
  • Changed "-a" in scripting.py so that "-a 0,1,2" includes only baselines that involve these antennas without autos (i.e. 0_1,0_2,1_2), rather than all baselines that involve any of the antennas. Listing 1 antenna will include all baselines involving that antenna.
  • Fixed combine_freqs.py to work with new numpy masked arrays.
  • Made fitmdl.py have a --sim_auto parameter that rejects auto-correlations by default. This makes fitmdl.py work more nicely with '-a' change above.

0.7.1

  • Changed "flat" to "flatten()" in plot_img.py, as per numpy-1.2.
  • Made plot_map.py able to function (only for cyl projection) without basemap.
  • Added FITS image I/O convenience functions to img.py. Defined standard FITS format based on VLA images.

0.7.0

  • Moved functions from xrfi.py script into rfi module
  • Bugfix in array shape in BeamFlat response() function
  • Ported to numpy>=1.2. Involved:
    • Update flag_by_int in rfi module for new numpy-1.2.ma behavior
    • Update miriad_wrap.cpp, healpix_wrap.cpp, alm_wrap.cpp for new numpy-1.2 API (PyArray_SimpleNew instead of PyArray_FromDims, npy_intp instead of int for array dimensions)

0.6.5

  • Bugfix to source strength polynomials as a function of LST
  • Corrected all 3C source postions in src.py using NED.
  • Ported to numpy>=1.1, matplotlib>=0.98, basemap>=0.99. Involved:
    • use of numpy.histogram with new=True in xrfi.py
    • importing Basemap from mpl_toolkits.basemap in plot_map.py
  • Split dependency installation into two scripts: install_required.sh which installs the minimum needed to be able to install aipy and run "import aipy", and install_recommended.sh which installs matplotlib/basemap and is needed for most of the scripts that come with AIPY.

0.6.4

  • Attempting to support easy_install/setuptools functionality while maintaining the simple building that already works.
  • Feature added to plot_map.py to give (ra,dec),flux of location on a map when right-clicked.
  • Changed how plot_map.py plots to use imshow instead of contourf.

0.6.3

  • Added _cephes module (from scipy, cutting out fortran dependencies) which implements various scientific functions. Needed j1 = Bessel function.
  • Moved source-resolution estimator (using symmetric disc approx) from phs2src into separate AntennaArray.resolve_src(). Changed from incorrect sinc function to correct j1 (first order Bessel function).