ms - Module

Description
An AIPS++ measurement set is a AIPS++ table which obeys specific conventions. These conventions are defined in note 229. Like all AIPS++ tables the measurement set will always appear as a directory which contains a number of files and directories.

Measurement set tables come in two slightly different versions, single dish and interferometric. Single dish measurement sets store the observed data as real numbers in the FLOAT_DATA column of the measurement set, whereas interferometric ones use complex numbers in the DATA column.

A measurement set table can contain data from a variety of different observations with different spectral or polarimetric configurations, different pointings and different instruments. To do this it needs to handle data with differing shapes. The data shape referred to here is two-dimensional with the length of the axes being the number of correlations and the number of channels in the data. A typical shape might be [4, 1], which could correspond to a continuum observation where the [RR, LL, RL, LR] polarizations where correlated. In the same measurement set there may be data with a shape of [1, 32], which corresponds to a spectral line observation, with 32 channels, where only the [XX] polarizations are correlated.

Tools

ms	Operations on measurement sets
ms2fromms1	MeasurementSet Version 1 to Version 2 converter
msplot	tool for MeasurementSet plotting, display, listing and editing

Functions

is_ms Is the argument a ms tool?

msfiles Find the list of MS files in the given directory

msplotapplyflags Apply flag columns

mstest Test for the proper functioning of the ms tool

Next: ms - Tool Up: General Previous: imageprofilesupporttest - Function Contents Index

is_ms	Is the argument a ms tool?
msfiles	Find the list of MS files in the given directory
msplotapplyflags	Apply flag columns
mstest	Test for the proper functioning of the ms `tool`