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Introduction

This document is an AIPS++ applications-specific supplement to ``The Glish 2.7 User Manual.''. Glish is both a programming language and an environment for data acquisition and analysis. It contains many of the mathematical features of other languages such as Fortran and C, and it is particularly strong on array arithmetic. To the user, glish becomes AIPS++ or a telescope control system with the addition of functions and ``clients'' for those applications. In fact, both applications may be run from the same invocation of glish, if so desired.

Here we shall cover the main language features with simple examples drawn from test data acquired by the GBT hardware systems now under development. The emphasis will be on the tools for writing your own data and control functions rather than on a review of AIPS++ library functions. Also, only a few of the built-in glish functions will be mentioned. See section 10.12 of the Glish User Manual for a complete function summary, and the AIPS++ User Reference Manual for information on the AIPS++ library. A few elements of the AIPS++ library are used below; when discussed the relevant section of the AIPS++ User Reference Manual is available via the link.

I shall assume that you have access to a working AIPS++ installation. Details about setting up your AIPS++ environment are given in Getting Started in AIPS++.