Gamma File Decription

Basically, in GAMMA, we can name the file in any type if we want. But, there are also some common habit to name different types to make non-GAMMA guys readable, which is very similar like other softwares but not absolutely same.
Here will introduce some common names of GAMMA-based files from SLC step to Unwrapping step.

ps: GAMMA software has several modules: MSP, ISP, DIFF&GEO, IPTA. MSP for focusing, ISP for interferometry, DIFF&GEO for DInSAR and gecoding, IPTA mainly for TS-InSAR (conventional PS and SBAS).

MSP
(skipped here)
ISP
*.slc (same thing as roi_pac)
*.slc.par (parameters' file about orbit, width, length, time, ... But parameters in *.par file is far less than *.rsc file)
*.mli (magnitude image of SLC after doing multilook)
*.mli.par (same thing like *.slc.par, but width and length are changed due to multi-looking)
*.rslc (co-registrated SLC, for TS-InSAR, usually coregistrated to one master image)
*.rslc.par (parameter file of *.rslc, absolutely same as *.slc.par)
*.rmli (co-registrated magnitude images of multi-looked SLC)
*.rmli.par (parameter file of ...)

*.off (offset file of co-registration, fitted polynomial parameters, length, width)
*.offs (COMPLEX file, offset value in each chosen points, real and imaginary parts for Range and Azimuth offset)
*.snr (std of co-registration in each point, which will be used to mask some points based on a threshold)
*.offset ( text file of *.offs)

*.coffs (COMPLEX file, culled offset of *.offs)
*.coffsets (text type of *.coffs)

*.base (baseline file)
*.base.perp (perpendicular baseline file)

*.cc (coherence map)
*.int (original interferometry file, include every signal, flatten phase, DEM, Def, APS,...)
*.flt ( "flatten" interferogram, after removing flatten signals from *.int)
*.smcc (coherence map based on filtered interferogram)
*.sm_flt (filtered *.flt interferogram)

DIFF & GEOCODE*************
*.diff (remove flatten signals and topography signals)
*.flag (masked file based on coherence map, 0 and 1, only used for Branch-cut unwrapping )

*.mask.ras (masked file for MCF unwrapping, also masked based on coherence)
*.unw (unwrapped file , data type order is different from that of Roi_PAC's .unw file)

The same thing as ISP, all files based on filtering will include "sm", e.g., *sm.diff, *.sm.unw, but the final part of suffix will not change.

*.htg (digital elevation model in radar coordinates)
*.dem (..... in UTM coordinates)

*.utm_to_rdc (lookup table: from utm to radar coordinates)

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