About the Synthesis of DFM Data

The synthesis of Double Fourier Modulation data has been performed with a blind deconvolution algorithm and with the CLEAN algorithm via AIPS (Greisen et al. 2003). Only the second one has been proved robust enough for DFM data. 

The next step will be to perform some modifications on the CLEAN algorithm by coding a DFM specific one, in order to include some FTS algorithms such as phase correction and apodization. Apodization requires a unique zero path difference (ZPD), and research would need to be performed to design tailored apodization filters for DFM data. 

Current FTS phase correction algorithms are also dependent on a unique ZPD. However, the instrumental phase errors, if linear, will affect in the same way different regions of an interferogram. This fact can be used to redesign some of the existing phase correction algorithms, for example the Forman phase correction one. 

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