Unable to read the conncomp file generated by Snaphu for unwrapping error correction, with the processor being GAMMA.

[Aoqing Guo]

Dear MintPy Developers,

I am currently using smallbaselineApp.py and would like to apply unwrapping error correction on files generated by Gamma. However, I am unable to read and recognize the conncomp files properly. I am seeking your assistance to resolve this issue.

My Setup:

• File Structure:
  interferograms/data1-data2/diff_filt_20191219-20191231_4rlks.unw.conncomp
• Configuration File Setting:
  mintpy.load.connCompFile = ../interferograms/*/diff_filt_*.unw.conncomp
• Error Message:
  prep_gamma.py "../interferograms/*/diff_filt_*.unw" --dem "../geometry/sim_*_4rlks.rdc.dem"
  prep_gamma.py "../interferograms/*/filt_*.cor" --dem "../geometry/sim_*_4rlks.rdc.dem"
  prep_gamma.py "../interferograms/*/diff_filt_*.unw.conncomp" --dem "../geometry/sim_*_4rlks.rdc.dem"
  Traceback (most recent call last):
    File "/home/user/anaconda3/envs/mintpy/bin/smallbaselineApp.py", line 10, in <module>
      sys.exit(main())
    File "/home/user/anaconda3/envs/mintpy/lib/python3.10/site-packages/mintpy/cli/smallbaselineApp.py", line 209, in main
      run_smallbaselineApp(inps)
    File "/home/user/anaconda3/envs/mintpy/lib/python3.10/site-packages/mintpy/smallbaselineApp.py", line 1155, in run_smallbaselineApp
      app.run(steps=inps.runSteps)
    File "/home/user/anaconda3/envs/mintpy/lib/python3.10/site-packages/mintpy/smallbaselineApp.py", line 908, in run
      self.run_load_data(sname)
    File "/home/user/anaconda3/envs/mintpy/lib/python3.10/site-packages/mintpy/smallbaselineApp.py", line 176, in run_load_data
      mintpy.cli.load_data.main(iargs)
    File "/home/user/anaconda3/envs/mintpy/lib/python3.10/site-packages/mintpy/cli/load_data.py", line 123, in main
      load_data(inps)
    File "/home/user/anaconda3/envs/mintpy/lib/python3.10/site-packages/mintpy/load_data.py", line 812, in load_data
      prepare_metadata(iDict)
    File "/home/user/anaconda3/envs/mintpy/lib/python3.10/site-packages/mintpy/load_data.py", line 636, in prepare_metadata
      prep_module.main(iargs)
    File "/home/user/anaconda3/envs/mintpy/lib/python3.10/site-packages/mintpy/cli/prep_gamma.py", line 158, in main
      inps = cmd_line_parse(iargs)
    File "/home/user/anaconda3/envs/mintpy/lib/python3.10/site-packages/mintpy/cli/prep_gamma.py", line 146, in cmd_line_parse
      raise ValueError(msg)
  ValueError: unsupported input file extension: .conncomp
  supported file extensions: ['.unw', '.cor', '.int', '.dem', '.hgt_sim', '*to_rdc', '*2_rdc', '*2rdc']
  

Troubleshooting Steps Taken:

I tried running smallbaselineApp.py without setting:

mintpy.unwrapError.method = phase_closure

In this case, the script runs successfully, and I can obtain results. However, when I enable unwrapping error correction, the script fails to recognize the conncomp file and does not proceed.

I have attached the necessary files for reference:

• 0-*: Files that fail to run (require unwrapping error correction).
• 1-*: Files that successfully run (without unwrapping error correction).

Could you please help me identify the issue and provide guidance on how to correctly load and use the conncomp files for unwrapping error correction?

Thank you in advance for your time and assistance!

Best regards,

Aoqing

[Zhang Yunjun]

Hi Aoqing,

If you have the connected components files for the Gamma products, the support should be easy to add. Please feel free to open an issue on GitHub, I will be more than happy to help implementing this functionality.

Cheers,

Yunjun

[Aoqing Guo]

Hi Yuanjun,

Thank you very much for your help.
I have uploaded the issue description and related code links on GitHub. (https://github.com/insarlab/MintPy/issues/1375)

I would greatly appreciate it if you could assist me when you have some free time.  

Best,

Aoqing

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[Aoqing Guo]

Hi Yunjun(So sorry for calling you by the wrong name at last email),

Thank you very much for your help.
I have uploaded the issue description and related code links on GitHub. (https://github.com/insarlab/MintPy/issues/1375)

I would greatly appreciate it if you could assist me when you have some free time.  

Best,

Aoqing