CASA is designed to handle the complex end-to-end processing of radio interferometric data, including:
It consists of a high-performance C++ core for heavy calculations, bound to a Python interface for flexible scripting and interactive use. Context of Version 4.2.1
Correcting for instrumental and atmospheric effects that distort signals. casa 4.2.1.rar
If you are using this version to reproduce older astronomical results, you will typically interact with:
It supported advanced algorithms such as multi-scale CLEAN and OTF (On-The-Fly) mosaicking, which were revolutionary for wide-bandwidth radio imaging at the time. Core Tools for Users CASA is designed to handle the complex end-to-end
Historical reduction guides are still available on the CASA Guides Wiki for users needing to process legacy data. Introduction to CASA - NRAO
Pre-defined functions (tasks) like tclean for imaging or plotbandpass for inspecting calibration solutions. Core Tools for Users Historical reduction guides are
Released around late 2014, version 4.2.1 was a critical release during the early full-science operations of ALMA.