v0.2.0

Pyvisgen v0.2.0 (2024-06-12)

API Changes

Bug Fixes

• fix baseline num calculation
• fix wavelength scaling
• fix lm grid calculation
• fix gridding so that it fits the numpy fft gridding #28

New Features

• implement GPU support for visibility calculations
• new grid mode:
  • when more than one visibility falls into the same pixel, only the first is calculated
  • define grid before calculation
• new dense mode:
  • calculate visibilities for a dense uv grid
  • simulate ideal interferometer response
• add sensitivity cut in image space:
  • avoid calculation of pixel values below detection threshold
  • significantly speed-up simulations
• add torch compile to RIME functions #28

Maintenance

• delete unused code and relicts
• change from numpy arrays to torch tensors
• change some of the keywords to more common phrases inside the toml config
• update default data_set.toml
• delete old config examples
• avoid torch einsum for better readability of the code #28

Refactoring and Optimization

• refactor data classes (Visibilities, Baselines)
• add observation class, which holds all relevant information
• drop scan-wise splitting in visibilities calculations, but split all valid baselines equally
• refactor RIME components (currently only uncorrupted available)
• refactor baseline calculations by replacing loops with pytorch built-in methods #28