Examine the Calibrated Data

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4.6.2 Examine the Calibrated Data

Once the source data is calibrated using applycal, you should examine the uv data and flag anything that looks bad. If you find source data that has not been flanked by calibration scans, delete it (it will not be calibrated).

For example, to look at the calibrated Jupiter data in the last example given in the previous section:

plotxy(’jupiter6cm.usecase.split.ms’,’uvdist’,’amp’,’corrected’,
selectdata=True,correlation=’RR LL’,fontsize = 14.0)

will show the CORRECTED_DATA column. See Figure 4.11.

Figure 4.11: The final ’amp’ versus ’uvdist’ plot of the self-calibrated Jupiter data, as shown in plotxy. The ’RR LL’ correlations are selected. No outliers that need flagging are seen.

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See § 3.3 for a description of how to display and edit data using plotms or plotxy, and § 7.4 for use of the viewer to visualize and edit a Measurement Set.

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