Backend Overview

Simulation and imaging are separate choices. A Measurement Set produced by either simulator can be passed to either common imaging backend:

Telescope + SkyModel + Observation
                |
    InterferometerSimulation.run_simulation
          [SDP or OSKAR]
                |
         Visibility (MS)
                |
       get_imager(SDP or WSCLEAN)
                |
        invert -> dirty + PSF
                |
        restore -> CLEAN/restored image
                |
       analysis / source detection

Supported backend selectors
Operation	Selector and string value	Entry point
SDP simulation	`SimulatorBackend.SDP` (`"ska-sdp"`)	`InterferometerSimulation.run_simulation`
OSKAR simulation	`SimulatorBackend.OSKAR` (`"OSKAR"`)	`InterferometerSimulation.run_simulation`
SDP imaging	`ImagingBackend.SDP` (`"sdp"`)	`get_imager` followed by `invert` and `restore`
WSClean imaging	`ImagingBackend.WSCLEAN` (`"wsclean"`)	`get_imager` followed by `invert` and `restore`

Simulation defaults to OSKAR. Imaging defaults to SDP unless IMAGING_BACKEND is set. Pass both selectors explicitly for reproducible workflows. Construct the telescope for the selected simulator; the available telescope names and beam options depend on that simulator.

Both common imaging adapters accept Measurement Sets. The separate karabo.imaging.imager_oskar utility remains available for dirty imaging, including OSKAR visibility files, but is not a member of ImagingBackend and does not provide CLEAN/restoration.

See Simulation Backend Selection and Imaging Backend Selection for usage, and Migrating from RASCIL for upgrading older workflows.