tart2ms 0.1.1b6

Convert TART observation data to Measurement Sets

tart2ms

Convert data from a TART radio telescope to measurement set format. This module relies on the excellent dask-ms module as a helper to create the measurement sets.

Examples

Download data from the TART in real time via the RESTful API (defaults to using the API at https://tart.elec.ac.nz/signal):

tart2ms --ms data.ms

To convert a previously downloads JSON file to a measurement set (MS):

tart2ms --json data.json --ms data.ms

To synthesize (using wsclean) the image from the measurement set:

wsclean -name test -size 1280 1280 -scale 0.0275 -niter 0 data.ms

This will create an image called test-image.fits

Usage

usage: tart2ms [-h] [--json JSON] [--ms MS] [--api API] [--catalog CATALOG]
            [--vis VIS]

Generate measurement set from a JSON file from the TART radio telescope.

optional arguments:
-h, --help         show this help message and exit
--json JSON        Snapshot observation JSON file (visiblities, positions
                    and more). (default: None)
--ms MS            Output MS table name. (default: tart.ms)
--api API          Telescope API server URL. (default:
                    https://tart.elec.ac.nz/signal)
--catalog CATALOG  Catalog API URL. (default:
                    https://tart.elec.ac.nz/catalog)
--vis VIS          Use a local JSON file containing the visibilities for
                    visibility data (default: None)

Credits

Thanks to Simon Perkins and Oleg Smirnov for help in interpreting the measurement set documentation.

TODO

• Add the correct pointing direction of the array (in J2000).
• Sort out the correct polarization settings for LHCP.

Changelog

-0.1.1 Added switch to generate a second polarization.

• 0.1.0 first functioning release.