Next: 11. Calibration in Practice
Up: 10.4 Interferometric Calibration of
Previous: 10.4.3 Fitting Splines: the
Subsections
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
![\resizebox{16cm}{!}{\includegraphics[angle=270.0]{ad1f5.eps}}](img930.gif) |
On each baseline, the amplitude curves should be flat and equal to assume
the flux density of the calibrator.
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
, where
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.
![\resizebox{16cm}{!}{\includegraphics[angle=270.0]{ad1f6.eps}}](img933.gif) |
Next: 11. Calibration in Practice
Up: 10.4 Interferometric Calibration of
Previous: 10.4.3 Fitting Splines: the
S.Guilloteau
2000-01-19