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| Paper: |
Implementing Arbitrary Measurement Equations With The MeqTree Module |
| Volume: |
351, Astronomical Data Analysis Software and Systems XV |
| Page: |
355 |
| Authors: |
Smirnov, O.M; Noordam, J.E. |
| Abstract: |
A Measurement Equation (ME) is a mathematical model of an instrument (e.g. a radio telescope) and the observed object(s). It can be used to predict the data measured with the instrument. In general, calibration of an observation (e.g. selfcal in radio astronomy) involves solving for parameters of an ME in some shape or form, by comparing observed and predicted data. Most calibration packages implicitly or explicitly implement some specific form of the ME. By sheer necessity, this involves making some simplifying assumptions about the instrument and the observation. As new instruments come on-line (WSRT LFFEs, LOFAR, etc.) we find ourselves pushing the limits of these assumptions. The MeqTree module provides a flexible system to implement MEs of arbitrary structure and complexity, and to solve for arbitrary subsets of their parameters. |
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