Processing SMA Data

The raw data in the SMA data directories, i.e., correlator output, are in MIR format, but can be converted to MIRIAD, CASA Measurement Set, or FITS (e.g., for AIPS) formats. Details of the software packages that can be use to calibrate and/or image the data follow:

  • MIR (Millimeter Interferometer Reduction)

  • is an IDL based software package, originally developed at Caltech for use at the OVRO millimeter array. Eric Keto and other CfA staff adapted it for the reading and calibration (but not imaging) of SMA data.

    There are two MIR distributions available for public use:

    1. The Official version, described in the MIR Cookbook, is the preferred version for most users. It is up to date, particularly with regard to data from the new SWARM correlator.

    2. Eric Keto's version, described on Eric Keto's MIR Website, is an implementation that makes extensive use of before-and-after plots to help the user more easily visualize individual calibrations.

    Note: By typing "idl", you will access 32-bit idl on 32-bit machines and 64-bit idl on 64-bit machines.

  • MIRIAD (Multichannel Image Reconstruction, Image Analysis, and Display)

  • is a command line based software package, originally developed to handle data from the Hat Creek (BIMA) telescope. It has been adapted by Jun-Hui Zhao and other CfA staff for the reading, calibration, and imaging of SMA data.

    Details of MIRIAD processing can be found on the MIRIAD Software for SMA website.

  • CASA (Common Astronomy Software Applications package)

  • is a software package developed to calibrate and image data from ALMA and other arrays.

    Details of SMA processing using CASA can be found on the SMA CASA Website

  • AIPS (Astronomical Image Processing System)

  • is a software package developed at NRAO in the late 1970s. It's primary purpose is to calibrate and image radio astronomical data from the VLA, VLBA, or VLBI network, but can also be used to image already calibrated SMA data.

    Click here for information specific to running AIPS on the R&G computers. General information about AIPS processing can be found in the The AIPS Cookbook.