SDP visibility receive workflow (continued)

Being able to receive visibility data into the SDP buffer in a well defined and complete data format is a critical component of any early SKA deployment. This feature should continue the work of the early prototype of the visibility receive recieve workflow started in PI#3 and extent it to be able to write visibility data files with sufficient metadata that they can be processed to produce images.

All agreed actions for PI4 in this feature were completed.

• Addressed a critical issue where, with small numbers of antennas and high data rate streams, not all packets were being read and decoded from the UDP buffer.
• Visibility receive workflow was updated to evaluate and write uvw coordinates to MSv2 files based on antenna coordinates loaded from a file (in main.c)
• Alternative formats to MSv2 have been reviewed and documented on confluence (SIM-237) along with performance tests vis receiver writing MSv2 files on the CSD3 RDS Lustre filesystem (SIM-265): https://confluence.skatelescope.org/display/SE/Alternative+Visibility+Storage+Formats