10.4.4 A few final checks

Once the amplitude calibration curve is stored, one can perform some simple checks on the calibrated data of the calibrator. These checks must be done in Jy (mode ``AMPLITUDE ABSOLUTE RELATIVE'' to the flux density of the calibrator).

  

Figure 10.5: Calibrated amplitude (Jy) versus time

10.4.4.0.1 Amplitude versus time

On each baseline, the amplitude curves should be flat and equal to assume the flux density of the calibrator.

10.4.4.0.2 Amplitude versus IF frequency

On each baseline, the amplitude curves should be flat, but they are not necessarily equal to flux of the calibrator because the decorrelation factor f is not taken into account here. To retrieve the flux density of the calibrator, they must be multiplied by the corresponding $e^{-(\Delta \phi)^{/2}}$, where $\Delta \phi$ is baseline rms phase noise determined during the phase calibration.

  

Figure 10.6: Calibrated amplitude versus IF frequency. The decorrelation factor is not calibrated out, and varies from baseline to baseline.