{"banner":"USEIF Fused Tracks — Multi-Modal Sensor Fusion","count":0,"fusionEngine":"USEIF Multi-Modal Sensor Fusion Engine","tracks":[],"emptyStateExplanation":"No fused tracks at this instant. The fusion engine correlates RF, acoustic, EO/IR, and SIGINT observations as they arrive — when no observations from two or more modalities overlap in space and time, there are no fused tracks to publish. To see fusion in action, submit a sensor observation via /api/observations/ingest, drop a sample via /field (Be A Sensor), or watch /cop where ADS-B alone produces single-modality tracks. ADS-B singletons are NOT promoted to fused tracks until a second modality corroborates.","howToPopulate":["POST observation: /api/observations/ingest","Phone sensor: /field","Live ADS-B singletons: /api/live-feed/tracks (single-modality, not yet fused)"],"protocolNote":"All fused tracks available in CoT/TAK, Link 16, VMF, and GeoJSON. Add ?format=cot|link16|vmf|geojson"}