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Update README.md

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@@ -59,4 +59,42 @@ They are included because they were already part of the cleaned file.
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  📝 Field Reference
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- Each row has the following structure (example):
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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  📝 Field Reference
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+ Each row has the following structure (example):
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+ {
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+ "uid": "scrubbed/row327047",
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+ "t_utc": "2013-09-09T09:51:00.000Z",
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+ "lat": 32.7152778,
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+ "lon": -117.1563889,
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+ "text": "2 white lights zig-zag over Qualcomm Stadium...",
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+ "src": "scrubbed",
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+ "city": "san diego",
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+ "state": "ca",
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+ "country": "US",
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+
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+ "cluster_id": 725,
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+ "prob": 1.0,
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+
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+ "moon_illum": 0.163603127,
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+ "moon_alt_deg": -67.0003509521,
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+ "nearest_airport_km": 3.7174715996,
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+ "nearest_airport_code": "KSAN",
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+ "reports_z": null,
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+ "wx_bucket": "unknown"
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+ }
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+
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+ Field descriptions
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+ Field Type Notes
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+ uid string Stable row identifier
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+ t_utc string Event timestamp, ISO-8601 UTC
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+ lat, lon float Approximate coordinates
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+ city, state, country string Cleaned location fields (best-effort)
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+ text string Free-text sighting description
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+ src string Original Kaggle dataset source
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+ cluster_id int Text-similarity cluster (for research use only)
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+ prob float Cluster membership probability
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+ moon_illum float Moon illumination (0–1)
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+ moon_alt_deg float Moon altitude in degrees
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+ nearest_airport_km float Distance to nearest airport
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+ nearest_airport_code string ICAO code
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+ wx_bucket string Approximate weather category
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+ reports_z float/null Unused placeholder field (kept for completeness)