Processing SMA Data
1.2 m Telescopes
SMA Data Calibration with MIR
MIR (Millimeter Interferometer Reduction) is an IDL based software package. Originally developed at Caltech for use at OVRO, it has been adapted for the reading and calibration (but not imaging) of SMA data. MIR is currently the recommended software for SMA data calibration. Be aware that IDL requires a license.
See the effects of each calibration step at MIR Calibration Steps Explained.
You can also find fixes for specific issues between 2005 and 2010 at SMA Data Errors and MIR Fixes.
MIR is available on all RTDC machines. Simply type
IDL is single threaded and has considerable memory requirements - typically 2.5-3 x the size of the data. For large SWARM datasets you may to rechunk, or only read in a single receiver or sideband at a time.
We are developing a MIR based pipeline for the calibration of SMA data. This is an ongoing project so you can expect updates to this section.
You can run any MIR script as a batch job from the command line. The example below shows how to run the calibration script calibratesmaswarm. Note that this script is for illustration purposes only and should not be used to calibrate real data . It requires four arguments: the path to the data, the data directory name, a rechunk flag, and an error flag. Here the output is written the screen and a log file.
When running batch jobs you can force any MIR task to accept the default options rather than waiting for user input at the prompt by using the /nowait flag.
Note that the script names must be consistent in order to run batch jobs. In this example, the first line of the script is
You can email firstname.lastname@example.org for general help. Or contact the MIR project scientist, Dr. Qi, at email@example.com with detailed questions.