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Baseline versus Antenna based calibration

Although many of these calibration parameters are antenna based, CLIC is able to keep simultaneously two values for these parameters: an antenna based value, and a baseline based value. Whenever an antenna based calibration function is computed (i.e. a part of the Ai, or of the Sij), CLIC offers the possibility of solving for an antenna based or a baseline based function. In general, solving for antenna based parameters should be preferred, since this mode offers less free parameters (so that they are better constrained) and uses a priori knowledge of the instrument (e.g. the phase closure relations). However, it may often be interesting to look at the baselines based solutions. Both methods are illustrated in this document.



Gildas manager
2002-02-04