Add support for Hyp3 INSAR_ISCE_MULTI_BURST format

[KavyaKinjalk]

Description of proposed changes

adds compatibility for HyP3's INSAR_ISCE_MULTI_BURST job format.

Here as well, HyP3 generates a single interferogram from multiple reference and secondary bursts. To maintain compatibility with MintPy's data model, the first reference granule is selected to represent the acquisition metadata.

With this, MintPy can process HyP3 multi-burst ISCE2 products for time-series analysis and SBAS workflows.

Reminders

• Fix #xxxx
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[sourcery-ai]

Reviewer's Guide

This pull request adds support for the Hyp3 INSAR_ISCE_MULTI_BURST product format by modifying the add_hyp3_metadata function. It introduces logic to detect this format based on the job ID derived from the directory name structure and updates metadata parsing to handle potentially multiple reference granules, selecting only the first one. Existing metadata extraction logic is extended to accommodate this new format.

File-Level Changes

Change	Details	Files
Detect and parse metadata for the isce2_multi_burst format.	Added conditional logic to identify isce2_multi_burst based on the job ID parsed from the directory name. Extracted date information specifically for the isce2_multi_burst naming convention.	src/mintpy/prep_hyp3.py
Adapt metadata handling and documentation for the multi-burst format.	Updated ReferenceGranule parsing to select only the first granule when multiple are listed. Extended existing metadata field population logic (e.g., relative_orbit) to apply to the isce2_multi_burst type. Updated the function docstring to describe the new format and its metadata structure.	src/mintpy/prep_hyp3.py

Possibly linked issues

• #0: The PR implements the HyP3 multi-burst support that the issue requests to be included in a new release.
• regularly updated docker image #123: PR adds support for INSAR_ISCE_MULTI_BURST HyP3 format, contributing to issue goal.

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[sourcery-ai]

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

• Using hardcoded indices for filename parsing reduces maintainability; consider alternatives like named constants or regular expressions.
• Consider refactoring the duplicated relative orbit calculation into a helper function.

Here's what I looked at during the review

• 🟡 General issues: 2 issues found
• 🟢 Security: all looks good
• 🟢 Testing: all looks good
• 🟡 Complexity: 1 issue found
• 🟢 Documentation: all looks good

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[Alex-Lewandowski]

Hi @KavyaKinjalk,

The multi-burst InSAR HyP3 product is still very new and will likely have an update to its naming convention in the near future.

I am using the following as a temporary workaround to rename the files so they can be loaded with prep_hyp3.py. It's messy but gets the job done while things are in a transient state.

from pathlib import Path

data_path = Path("path/to/your/multi-burst/hyp3/stack")

all_paths = sorted(list(data_path.glob('*/*.t*')))
for pth in all_paths:
    parts = pth.name.split("_")
    new_name = Path(f"{'_'.join(parts[:2])}_IWMULTIBURST_{parts[10]}_{parts[11]}_{'-'.join(parts[2:10])}_{'-'.join(parts[12:14])}_{'_'.join(parts[14:])}")
    pth.rename(pth.parent/new_name)

[KavyaKinjalk]

Hopefully they will just switch the name back to follow a similar convention because there really is no point in having a different name. Except for this part, everything else is still fully compatible. But both ways should work well. In my opinion, trying to find the file through the folder name sounds like a better idea than cutting the array off after 8. We will see what happens after they deprecate single burst. Additionally, I would like to add that the current code should be fully backwards compatible with the original format for single bursts. If they were to change the naming structure to fix this issue, there will be nothing to worry about anyway. incorporating something similar to this would only help remove the current issues anyone would be facing with this format.

[forrestfwilliams]

Hey @KavyaKinjalk just wanted to let you know that we're working on this at ASF and have started a GitHub issue to decide on a new name.

[forrestfwilliams]

Hey guys, sorry this has taken so long but we're finally getting around to updating the naming convention of these products to be compatible with MintPy without requiring changes. This documentation PR describes the format we're moving to.