precompute_beam_cache

One-time pre-computation script for beam rotation caches.

Run this script once before the main pipeline to precompute psi-roll rotations for each beam file. The resulting .npz files allow the runtime pipeline to skip one (or both) of the Rodrigues rotations per sample.

Usage:

python precompute_beam_cache.py [--n_psi 720] [--output_dir /path/to/cache/]
                                [--no_offsets] [--config config.yaml]

Command-line arguments:

Flag	Default	Description
--n_psi	720	Number of psi bins. 720 gives 0.5° resolution. Increase for beams wider than ~5°.
--output_dir	FOLDER_BEAM	Where to write .npz cache files. Defaults to the beam folder from the config.
--no_offsets	(flag)	Skip flat-sky angular-offset pre-computation. Use for beams wider than ~5° where the flat-sky approximation is invalid.
--config	config.yaml	Path to the config file to read beam settings from.