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huibintemaspampipeline [2019/02/07 11:14] – [Basic pipeline run] huibintemahuibintemaspampipeline [2019/02/18 11:37] – [Old hardware-correlator observations] huibintema
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 </code> </code>
 The output UVFITS file can be processed further in the main pipeline. The output UVFITS file can be processed further in the main pipeline.
 +
 +Regarding the main pipeline, there are two options that may be relevant to get to better results. The first option related to the situation explained above, where two sidebands (USB and LSB) are joined together to cover 32 MHz of bandwidth. In that case, it may help to turn on an image-based flagging option that treats the joined USB and LSB separately. Reason for this is that the USB and LSB have separate signal chains, and thus there can be system problems that relate only to one of the two sidebands.
 +<code python>
 +process_target( target_uvfits_file_name, flag_image_usb_lsb = True )
 +</code>
 +
 +The second option is to turn on baseline-based calibration, BUT ONLY AFTER VERY CAREFUL CONSIDERATION. In an ideal world, baseline-based calibration would never be necessary. However, I have witnessed situations using hardware-correlator data in which residual gain errors on baselines did not seem to be solely antenna-based. Baseline-based calibration is something to try as a last resort, and can be switched on in the pipeline as shown below. Please note that this is implemented under strict limitations: baseline-calibration is applied only in the final stages of the processing, and is determined on a per-observation base (meaning only one correction per baseline per observe session).
 +<code python>
 +process_target( target_uvfits_file_name, do_blcal = True )
 +</code>
  
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huibintemaspampipeline.txt · Last modified: 2020/10/05 17:46 by huibintema

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