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_docs/03_tests/49_degraded_satellite_data_spec.md

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+# Cross-Cutting Acceptance Test: Degraded Satellite Data
+
+## Summary
+Validate system robustness with outdated or lower-quality satellite imagery per operational constraints.
+
+## Test Description
+Test system performance when satellite data is:
+- Outdated (2+ years old)
+- Lower resolution (Zoom 17-18 instead of 19)
+- Partially missing (some areas without coverage)
+- From different season (winter satellite, summer flight)
+
+## Test Steps
+1. Use deliberately outdated satellite tiles
+2. Process AD000001-030
+3. Measure accuracy degradation
+4. Verify L2 (DINOv2) still matches despite appearance changes
+
+## Success Criteria
+- System continues to operate (no crash)
+- L2 retrieval still works (top-5 recall > 70%)
+- Accuracy degrades gracefully (may not meet AC-2, but should meet relaxed threshold)
+- Clear error/warning messages about data quality
+
+## Pass/Fail
+**Passes**: System operational with degraded data, graceful degradation
+**Fails**: Complete failure, crashes, or no indication of data quality issues
+