Improve LiCSAR metadata handling #4
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added 4 commits
October 15, 2025 05:06
…egration This commit adds full LiCSAR product support to MintPy, including: 1. Enhanced baseline handling (prep_licsar.py): - Read LiCSAR baselines file with format: frame_master_date acquisition_date perp_baseline temporal_baseline - Calculate perpendicular baseline as difference between acquisition dates relative to frame master - Fixed DATE12 extraction to get both master and slave dates from YYYYMMDD_YYYYMMDD filename pattern - Fixed interferogram detection to recognize .unw. and .cc. file patterns - Add temporal baseline (T_BASELINE) calculation 2. E,N,U geometry components support (load_data.py): - Add basisEast, basisNorth, basisUp to GEOM_DSET_NAME2TEMPLATE_KEY mapping - Create enhance_licsar_geometry_file() function to calculate derived geometry datasets - Calculate incidenceAngle from E,N,U using utils0.incidence_angle_from_enu() - Calculate azimuthAngle from E,N,U using utils0.azimuth_angle_from_enu() - Calculate slantRangeDistance from incidenceAngle using utils0.incidence_angle2slant_range_distance() - Add satellite HEIGHT attribute (693 km for Sentinel-1) for slant range calculation 3. Geometry dataset names (stack.py): - Add basisEast, basisNorth, basisUp to GEOMETRY_DSET_NAMES list - Enable recognition of E,N,U components in geometry processing 4. XML parsing fix (readfile.py): - Handle PAMDataset XML files without ENVI metadata domain - Add None check before accessing metadata to prevent AttributeError Result: Complete LiCSAR workflow with 2000 interferograms, proper baselines, and full geometry including pixel-wise incidence/azimuth angles calculated from E,N,U basis vectors.
…oint This commit adds: 1. New utility functions in utils0.py: - incidence_angle_from_enu(): Calculate incidence angle from E,N,U unit vectors using θ = arccos(|U|) - azimuth_angle_from_enu(): Calculate azimuth angle from E,N,U using α = atan2(E, N) Both functions follow MintPy coordinate conventions and include quality masking 2. CLI entry point in pyproject.toml: - Add create_licsar_geometry.py command for standalone geometry file creation 3. Standalone geometry creation tool (create_licsar_geometry.py): - Command-line tool to create enhanced LiCSAR geometry files - Reads E,N,U components and calculates all required geometry datasets - Can be used independently or called from load_data.py
- Update enhance_licsar_geometry_file() to generate 2D lat/lon grids - Use X_FIRST, X_STEP, Y_FIRST, Y_STEP from metadata - Grids match gdalinfo corner coordinates - Float32 format with lzf compression - Tested and verified with test_latlon_simple.py
- RLOOKS = (X_STEP in meters) / (range pixel spacing in ground range) - ALOOKS = (Y_STEP in meters) / (azimuth pixel spacing) - Convert slant range spacing to ground range: slant / sin(incidence) - Use native Sentinel-1 pixel spacing: range=2.3m, azimuth=13.9m - Fixes KeyError: 'ALOOKS' during ifgram_inversion step - Correctly accounts for multilooking in geocoded LiCSAR products
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Summary
Testing
https://chatgpt.com/codex/tasks/task_e_68ed631ed92c832098d858654646f970