Releases: nrao/astrohack
v0.5.5
This release contains the following changes:
- It is now possible to specify a specific amplitude cut off for any antenna and ddi combination.
- Apertures are no longer clipped to allow for the analysis of the noise outside the dish image.
- Aperture amplitude plots now display simple amplitude and noise statistics.
v0.5.4
- New Feature:
- Added antenna surface RMS estimates before and after screw adjustments to Gain table and screw adjustment files.
v0.5.3
- Bug fixes
The U and V axes of the aperture FITS files produced by image_mds.export_to_fits
had the wrong values, this is now fixed.
extract_holog now works with int ddi input
- Improvements
Improved resolution of the display of frequency in the file containing the screw adjustments
Improved header definition of the exported ASCII screw adjustment file
gaussian convolution is now the default gridding method in holog.
Panel fitting and correction have been optimized with execution times being 10-50% faster depending on model.
holog_obs_dict json files are no longer created as hidden files (. file name)
Decreasead overall verbosity of tasks.
- New Features
New method for image_mds file that export phase fitting results: export_phase_fit_results
New method for panel_mds file that export estimated antenna gains at multiple frequencies: export_gains_table
New model for panel fitting, flexible, based on the model of the same name found in AIPS.
inspect_holog_obs_dict now also opens the holog_obs_dict inside of holog_mds files.
- Miscelanious changes
Replaced dependency of graphviper with toolviper
v0.5.2
Correcting previous release
v0.5.1
This release adds a new method of gridding the visibilities onto a beam.
This method uses the convolution of the visibilities with a gaussian kernel with a size similar of the primary beam.
This is a fast release to attend to VLA validation needs, no documentation on the gaussian convolution gridding is provided at this point.
v0.5.0
New in AstroHACk v0.5.0:
-
General
- Dropped support for python 3.8, prompted by drop of support for 3.8 in graphviper
- Pixel coordinates now reflect the middle of the pixel rather than its left edge
- U and V axes are now always in meters in data files rather than in kilo lambda
-
Combine
- Fixed weighted combining of DDIs
-
Holog
- Refactoring for better separation between beam gridding and aperture generation
- Padding with zeros now produces images that have a size of 2^(ceiling(log2((original_size*padding_factor)))
- image_mds.plot_apertures can now choose polarization state
- image_mds.plot_beams plots are now split by polarization state
- Beam gridding using a gaussian kernel
- Bug fix: Calling holog with a grid_size and cell_size no longer overwrite these values in the input .holog.zarr file
-
Panel
- Screw adjustments file now contains the method use to fit the panel and if it was a fallback
- Polarization state selection with I being the default
-
ALMA Near field support (Alpha)
- ALMA NF ASDM filler to the .holog.zarr format
- Selection of ALMA OSF pad in holog to determine distance and defocusing
- Beam apodization
- Non-fresnel terms in aperture generation (Not fully correct)
- Phase near field corrections (Not fully correct)
- GILDAS\CLIC like phase fitting including astigmatism
