AIPS++/CASA

AIPS++/CASA is an astronomical data processing system developed by a consortium of (radio-)astronomical institutes. See the AIPS++ pages for more information on AIPS++/CASA.

The system consists of a set of layered libraries (packages) which can be seen best using the Modules page.

Bindings to the libraries have been created for Python and Glish.

The main features of AIPS++/CASA are:

Templated N-dim Array class and other containers.
N-dim functions with auto-differentiation and linear or non-linear fitting.
Table data system supporting N-dim arrays with advanced querying.
Values with physical units (Quanta) and astronomical reference frames (Measures).
MeasurementSets for storing data in the UV-domain.
N-dim images in world coordinates with various analysis operations.

Recently the casacore package has been formed from the core AIPS++ libraries. The pyrap package contains the Python bindings of casacore libraries.

Casacore consists of the following subpackages:

casa Core modules: N-dim arrays, quanta, OS, IO, logging, and various other classes.

scimath Mathematical modules N-dim functionals, linear/non-linear fitting, and miscellaneous,

tables Database-like tables with advanced query language (TaQL) and plotting.

measures Quantities with references frames and their persistency.

lattices Memory- or disk-based N-dim arrays (lattices) with masking, regions, expressions, and math.

fits A C++ interface on top of cfitsio.

ms The data format for visibility data as described in the MeasurementSet definition.

msvis Accessor and iterator classes for MeasurementSets

msfits Mapping of MeasurementSets to/from FITS.

coordinates Coordinates for astronomical images.

components Sky components (point sources, gaussians, etc.)

images N-dim images with masks, coordinates, and history.

The package dependencies are as follows:

casa

scimath casa

tables casa

measures tables scimath casa

lattices tables scimath casa

fits measures tables scimath casa cfitsio

ms measures tables scimath casa

msvis ms measures tables scimath casa

msfits ms fits measures tables scimath casa cfitsio

coordinates fits measures tables scimath casa wcslib cfitsio

components coordinates fits measures tables scimath casa wcslib cfitsio

images components coordinates fits measures tables scimath casa mirlib wcslib cfitsio

mirlib, wcslib, and cfitsio are external packages used by casacore.

casa	Core modules: N-dim arrays, quanta, OS, IO, logging, and various other classes.
scimath	Mathematical modules N-dim functionals, linear/non-linear fitting, and miscellaneous,
tables	Database-like tables with advanced query language (TaQL) and plotting.
measures	Quantities with references frames and their persistency.
lattices	Memory- or disk-based N-dim arrays (lattices) with masking, regions, expressions, and math.
fits	A C++ interface on top of cfitsio.
ms	The data format for visibility data as described in the MeasurementSet definition.
msvis	Accessor and iterator classes for MeasurementSets
msfits	Mapping of MeasurementSets to/from FITS.
coordinates	Coordinates for astronomical images.
components	Sky components (point sources, gaussians, etc.)
images	N-dim images with masks, coordinates, and history.