...
Most users would want their data in the CASA Measurement Set Format (MS). MeerKAT data is stored in a native format known as MeerKAT Visibility Format (MVF) which is a distributed structure. The in-house package katdal (KAT data access layer) is used to retrieve the data and the script mvftoms.py is used to convert to MS format. Note that this process can take several days, depending on the size of the dataset and the load on our transfer servers. Once the file is ready, you will receive an email with a download link.
| Note |
|---|
The direct download link created for your measurement set is valid for a month. Please contact the SARAO helpdesk in advance should you need this period extendedensure to download the dataset link taking into account the link expiry date received automatically. |
Since the last archive update of 9 March 2022, users will be taken directly to the configuration options for measurement set configuration. The estimated dataset size is indicated in the top left, next to the ‘Create Direct Download’ button.
Note that currently the old MS file will need to be cleared manually by the archive support team MS file link automatically generated has a validity period of 60 days that is send directly to your registered credentials. Once the link-validity period has expired, then only one is able to re-request another set of MS parameters as part of the SARAO data life-cycle policy. So choose wisely before you can generate a dataset with new parameters, so choose wisely. If you run into problems, please contact the helpdesk for assistance.
...
| Note |
|---|
A note to observers of strong spectral lines: The SDP flagger is very good at finding narrow lines and flagging them, particularly Galactic HI and maser lines. In this case you should not apply the ingest_rfi flags. It is strongly advised that you keep cam and data_lost flags since these are due to system issues such as antennas losing target lock or correlator faults. |
...