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CHANGELOG.rst

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Changelog

Dev

Fixed

  • Better handling of errors when GPUs are present but currently unavailable for some reason.

Tests

  • Correct formation of SkyModel for pyradiosky>=0.3.0 in tests.

Version 1.0.1

Fixed

  • When getting the raw beam data for GPU, there was a check for whether the beam covers the whole sky which didn't always pass when it should have. This has been fixed.

Performance

  • Added the ability to stop checks on whether the beam interpolates to inf/nan.

Version 1.0.0

Version 1.0 is a major update that brings the GPU implementation up to the same API as the CPU implementation. It also removes support for (l,m)-grid beams.

Removed

  • Support for bm_pix and use_pixel_beams (in both CPU and GPU implementations). Now, using a UVBeam object will automatically use interpolation on the gridded underlying data (which is typically in az/za). This can be done directly using methods in UVBeam, or via new GPU methods. If you input an AnalyticBeam, the beam will instead just merely be evaluated.

Added

  • Polarization support for GPU implementation.

Changed

  • Faster performance if using beam_list and the frequency is not in the freq_array. (interpolation done before the loop).
  • Factor of ~10x speed-up of vis_cpu due to changing the final einsum into a matrix product.
  • BREAKING CHANGE: the output from the CPU and GPU implementations has changed shape: it is now (Ntimes, Nfeed, Nfeed, Nant, Nant) (and without the feed axes for non-polarized data).

Internals

  • vis_cpu and vis_gpu modules renamed to cpu and gpu respectively, to avoid some problems with name clashes.
  • New more comprehensive tests comparing the GPU and CPU implementations against each other and against pyuvsim.
  • New tests of documentation notebooks to ensure they're up to date.

Documentation

  • Updated sphinx them to Furo.
  • More complete Module Reference documentation.
  • Updated tutorial to match the new API.
  • Added a new "Understanding the Algorithm" page (with math!)

Version 0.4.3

Changed

  • Call UVBeam.interp with reuse_spline=True and check_azza_domain=False for significantly faster performance when using beam_list.

Version 0.4.2

Fixed

  • The visibility integral, calculated with the call to einsum, has been fixed. It now takes an outer product over feeds, sums over E-field components, and performs the integral over the sky.

Version 0.4.0

Changed

  • Enhanced performance by allowing unique beams only to be passed (no breaking API change).
  • Enhanced performance of vis_cpu by only using sources above horizon, and changing some array multiplication strategies (factor of ~3).

Version 0.2.3

Fixed

  • Fix issue with spurious beam normalization when a pixel beam interpolation grid is generated from a UVBeam object
  • Fix bug where the imaginary part of complex pixel beams was being discarded
  • Fix bug that was causing polarized calculations to fail with simulate_vis
  • CI paths fixed so coverage reports are linked properly

Added

  • New units tests

Version 0.2.2

Fixed

  • Fix issue with complex primary beams being cast to real

Version 0.2.1

Fixed

  • Make IPython import optional.

Version 0.2.0

Changed

  • lm_to_az_za --> enu_to_az_za and added orientation parameter. Significant increase in documentation of this and related coordinate functions.
  • Refactoring of construction of spline within main CPU routine to its own function: construct_pixel_beam_spline.

Added

  • eci_to_enu_matrix function
  • enu_to_eci_matrix function
  • point_source_crd_eq function
  • equatorial_to_eci_coords function
  • uvbeam_to_lm function
  • New plotting module with animate_source_map function.
  • Ability to do polarization! (Only in vis_cpu for now, not GPU).
  • New wrapper module with simulate_vis function that makes it easier to simulate over an array of frequencies and source positions in standard RA/DEC (i.e. it does the frequency loop, and calculates the rotation matrices for you). It is an example wrapper for the core engine.
  • Many more unit tests.

Version 0.1.2

Fixed

  • Installation of gpu extras fixed.

Version 0.1.1

Fixed

  • Fix import logic for GPU.

Version 0.1.0

  • Port out of hera_sim.