LOFAR in interferometric mode

Challenges in calibration and imaging

A-Team sources

Problematic RFI at low frequencies

Typical high band pre-processing ● Observations are taken

● 488 subbands 110-190 MHz● 1 second integration time● 64 channels per subband

FlaggingDemixing (A Team)Averaging

● Observations are made available● 488 subbands 110-190 MHz● 5 second integration time● 4 channels per subband

Data volume reduced from > 200 TB to about 3-4 TBIf you want to keep the original data you need to request it!