Load ARIA-tools generated ionosphere stack from the template file

[ehavazli]

• Add the --iono option to load_data.py arguments so when ionosphere file is given in the template, the load_data step will read the ionoStack.vrt.
• Fix a bug in prep_aria.py which was causing the script to skip loading to ionStack.h5

Summary by Sourcery

Adds the ability to load ARIA-tools generated ionosphere stack from the template file using the --iono option in load_data.py. Fixes a bug in prep_aria.py that prevented loading to ionStack.h5.

New Features:

• Adds the --iono option to load_data.py arguments so when ionosphere file is given in the template, the load_data step will read the ionoStack.vrt.

Bug Fixes:

• Fixes a bug in prep_aria.py which was causing the script to skip loading to ionStack.h5

[sourcery-ai]

Reviewer's Guide by Sourcery

This pull request introduces the ability to load ionosphere data from a template file using the --iono option in load_data.py. It also fixes a bug in prep_aria.py that was preventing the ionosphere stack from being loaded correctly.

Sequence diagram for loading ionosphere data with load_data.py

sequenceDiagram
  participant User
  participant load_data.py
  participant mintpy.load.ionUnwFile

  User->>load_data.py: Executes load_data.py with --iono option
  load_data.py->>mintpy.load.ionUnwFile: Reads ionosphere data from file specified by --iono
  mintpy.load.ionUnwFile-->>load_data.py: Returns ionosphere data
  load_data.py-->>User: Completes data loading

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Sequence diagram for loading ionosphere stack with prep_aria.py

sequenceDiagram
  participant prep_aria.py
  participant writefile.layout_hdf5

  prep_aria.py->>writefile.layout_hdf5: Writes ionosphere stack to ionStack.h5
  writefile.layout_hdf5-->>prep_aria.py: Completes writing

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File-Level Changes

Change	Details	Files
Added the --iono option to load_data.py to enable reading the ionoStack.vrt file when specified in the template.	Added the --iono argument to the ARG2OPT_DICT dictionary, mapping it to the mintpy.load.ionUnwFile option.	src/mintpy/load_data.py
Fixed a bug in prep_aria.py that prevented loading to ionStack.h5.	Moved the definition of outname outside of the if statement to ensure it's always defined. Updated the out_file argument in the run_or_skip function call to use the outname variable.	src/mintpy/prep_aria.py

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[sourcery-ai]

Hey @ehavazli - I've reviewed your changes - here's some feedback:

Overall Comments:

• Consider adding a unit test for the new --iono option in load_data.py.
• The bug fix in prep_aria.py looks good, but could benefit from a brief comment explaining the original issue.

Here's what I looked at during the review

• 🟢 General issues: all looks good
• 🟢 Security: all looks good
• 🟢 Testing: all looks good
• 🟢 Complexity: all looks good
• 🟢 Documentation: all looks good

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