Scripts to reduce data from large radio telescopes (GMRT, VLA)
These scripts run the MIRIAD package for the reduction of interferometric (mult-dish) data (https://www.atnf.csiro.au/computing/software/miriad/). While this is fine for the six dish Australia Telescope Compact Array (ATCA), which has 15 antenna baseline pairs and limited bandwidth, for the large interfometers - the Giant Metrewave Radio Telescope (GMRT, http://www.gmrt.ncra.tifr.res.in) and Very Large Array (VLA, https://public.nrao.edu/telescopes/vla/), up to 30 dishes (435 antenna pairs) and very low frequnecies (for hydrogen at high redshift) in a hostile radio frequency environment, mean that some automation is required.
prep-freq.csh - loads and calibrates the data prep-freq.csh - is a version of this which splits the data down into smaller frequency bands (for wide-band data) rms.csh - will measure the rms noise level of each baseline pair flag_rms.csh - will remove the baseline pairs with a noise level above a specified threshold image-*csh - will produce an image and 3D cube of the remaining data (by frequency band)