{"cycle":"2026-10-01","source":"https://www.faa.gov/air_traffic/flight_info/aeronav/aero_data/NASR_Subscription/2026-10-01/","records":11677,"mapped":11614,"unlocated":63,"normalized_equipment_records":11677,"unique_installations":null,"site_groups":8985,"by_table":{"NAV_BASE":1557,"COM":1168,"AWOS":2651,"RDR":369,"ATC_BASE":777,"ILS_BASE":1556,"ILS_GS":1381,"ILS_DME":925,"ILS_MKR":386,"AFF1":770,"JPL_RADAR":93,"FAA_SURFACE":44},"by_type":{"navigation":1557,"communications":1910,"weather":2651,"radar":506,"towers":723,"control":57,"landing":4248,"centers":25},"boundary_variants":58,"boundary_source":{"source":"https://services6.arcgis.com/ssFJjBXIUyZDrSYZ/ArcGIS/rest/services/Boundary_Airspace/FeatureServer","effective_date":"2026-09-03","valid_until":"2026-10-29","source_polygon_records":74,"centers":["ZAB","ZAK","ZAN","ZAP","ZAU","ZBW","ZDC","ZDV","ZFW","ZHN","ZHU","ZID","ZJX","ZKC","ZLA","ZLC","ZMA","ZME","ZMP","ZNY","ZOA","ZOB","ZSE","ZSU","ZTL","ZUA","ZWY"],"geometry":"FAA-published closed polygons; no prose-derived segments","variants":58},"omitted_boundary_segments":0,"unassociated":8781,"supplemental":{"long_range_sites":93,"terminal_model_records":190,"control_address_estimates":21,"equipment_inventory_dates":["2015-05-26","2022-03-04"],"note":"NASR cycle and supplemental evidence dates are distinct. Radar models are last documented types, not a claim of current equipment. NASA/JPL radar inventory is undated. TRACON buildings with an FAA-published address are mapped at labeled Census address estimates; tower address geocodes are retained as research only and are not rendered.","surface_deployments":{"ASDE-X":35,"ASSC":9},"airport_reference_markers":1105,"radar_inventory_by_type":{"ASR-11":73,"ASR-9 WSP":27,"ASR-9":65,"ASR":125,"BCN":1,"ASR-8":25,"PAR":50,"ARSR":3,"ARSR (model unspecified)":6,"ARSR-4":39,"CARSR":48,"ASDE-X":35,"ASSC":9}},"completeness":"Not a complete inventory. NASA/JPL supplies long-range radar site coordinates; FAA and NTSB supply selected terminal antenna positions. Many terminal radars and control facilities remain unlocated. Equipment inventories are dated, not live status. Markers without published equipment positions use labeled FAA airport reference points only when the airport association is documented. TRACON buildings with an FAA-published address use labeled Census address estimates; other address geocodes are not rendered. Center and FIR/CTA outlines use FAA chart-published polygons with separate high/low variants. They are not internal controller sectors.","deduplication":"AFF sites reconciled only by exact site name, type, state and source coordinates; shared center associations retained. Other cross-table duplicates have not been reconciled."}