{"type": "FeatureCollection", "_meta": {"__meta__": "synthetic", "disclaimer": "Synthetic demo data inspired by real Baltic geography, MMSI/OUI conventions, and infrastructure. Not real observations.", "dataset": "s4-spoofed-ais-identity/spoof_observed_track", "version": "1.0"}, "features": [{"type": "Feature", "properties": {"featureId": "spoof-x-radar-truth", "name": "Spoof platform X \u2014 radar-observed truth (~17 kn, length 28-34 m, RAD-PLN-01 T-7741)", "radar_track_id": "T-7741", "sensor_id": "RAD-PLN-01"}, "geometry": {"type": "LineString", "coordinates": [[24.085, 59.782], [24.115, 59.788], [24.27, 59.82], [24.43, 59.853], [24.595, 59.886], [24.815, 59.928], [25.02, 59.965]]}}]}