Introduction

The SMA correlator produces spectral data consisting of 24 spectral chunks in each of the two side bands. The MIR storage system (the archive format for the SMA data) can store the visibility data produced from the SMA digital correlator with a variety of spectral configurations. In principle, the number of channel and channel width (or spectral resolution) in each of the 24 spectral chunks can be different. The Miriad along with SMA software features supports such flexibility in the configuration of spectral data. In order to handle a large number of spectral windows in Miriad a number of original Miriad codes are modified by adding new software features. To distinguish the spectral data between different spectral chunks (or windows) and different sources, both spectral windows and observing sources are coded with colors in various displaying routines. The following sections show demonstrations of the SMA routines.