About Corrected Results and how to unwrap it

[toma1li]

First, i converted radar coordinate systems to latitude and longitudeuse using "proj_ra2ll.csh ../trans.dat ./phasefilt.grd ./phasefilt_ll.grd"

Second, i conducted tacos correction using "../gacos_operation.csh ../GACOS/20190726.ztd ../GACOS/20190726.ztd.rsc ../GACOS/20190807.ztd ../GACOS/20190807.ztd.rsc ./phasefilt_ll.grd ../reference_point 33.86"

At second, i got two results "phase_GACOS_corrected_phs.grd" and "phase_GACOS_corrected_phs_detrended.grd", which should i use?

Third, i converted latitude and longitudeuse to radar coordinate systems using "proj_ll2ra.csh ../trans.dat ./phase_GACOS_corrected_phs.grd ././phasefilt_lll.grd".

At third, i converted for "phase_GACOS_corrected_phs.grd" and "phase_GACOS_corrected_phs_detrended.grd", when i read the coordinate range using “gmt grdinfo ./phasefilt_lll.grd”, the rang has changed. The range show in figure below.

Fourth, i deleted "phasefilt.grd” and changed name of "phasefilt_lll.grd” to "phasefilt.grd”.

Last, i unwrap it using "snaphu_interp.csh 0.1 0.001". The .csh can't work. The wrong show in figure below.

[toma1li]

At above, which step is incorrect? Thank you very much for your help！