Help for Residual Fringes Estimation and Removal
This function estimates residual fringes from differential interferograms and refines
orbital data to better flatten interferograms.
WARNING: this function has been implemented for tackling some extreme cases of very poor
information about orbital data or related problems.
However, if the available orbital data are not particularly bad, it is not suggested to run
this function.
In fact, small residual orbital error can be estimated and removed also through APS estimation.
Moreover, in some cases long wavelength signals can be due to terrain motion.
While the APS estimation is carried out after estimating phase trends in time, at this step
fringes are removed from single interferograms without considering their correlation in time.
It is therefore recommended to run this function only when fringes are seriously affecting
further analysis.
In any case, it has to be kept in mind that all long wavelengths are canceled out,
and thus also possible terrain motion.