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Gamma File Decription

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Yunmeng Cao edited this page Feb 23, 2017 · 27 revisions

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 **************************

  1. *.slc (same thing as roi_pac)

  2. *.slc.par (parameters' file about orbit, width, length, time, ... But parameters in *.par file is far less than *.rsc file)

  3. *.mli (magnitude image of SLC after doing multilook)

  4. *.mli.par (same thing like *.slc.par, but width and length are changed due to multi-looking)

  5. *.rslc (co-registrated SLC, for TS-InSAR, usually coregistrated to one master image)

  6. *.rslc.par (parameter file of *.rslc, absolutely same as *.slc.par)

  7. *.rmli (co-registrated magnitude images of multi-looked SLC)

  8. *.rmli.par (parameter file of ...)

  9. *.off (offset file of co-registration, fitted polynomial parameters, length, width)

  10. *.offs (COMPLEX file, offset value in each chosen points, real and imaginary parts for Range and Azimuth offset)

  11. *.snr (std of co-registration in each point, which will be used to mask some points based on a threshold)

  12. *.offset ( text file of *.offs)

  13. *.coffs (COMPLEX file, culled offset of *.offs)

  14. *.coffsets (text type of *.coffs)

  15. *.base (baseline file)

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

  17. *.cc (coherence map)

  18. *.int (original interferometry file, include every signal, flatten phase, DEM, Def, APS,...)

  19. *.flt ( "flatten" interferogram, after removing flatten signals from *.int)

  20. *.smcc (coherence map based on filtered interferogram)

  21. *.sm_flt (filtered *.flt interferogram)

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

  1. *.mask.ras (masked file for MCF unwrapping, also masked based on coherence)
  2. *.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.

  1. *.htg (digital elevation model in radar coordinates)

  2. *.dem (..... in UTM coordinates)

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

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