{
 "publisher": "DroneLedger",
 "site": "https://droneincidents.com",
 "generated": "2026-10-15T21:15:15+00:00",
 "release": "20261015T211515140090-3f2de6",
 "license": {
  "name": "CC BY 4.0",
  "url": "https://creativecommons.org/licenses/by/4.0/",
  "attribution": "DroneLedger (droneincidents.com)",
  "excludes": "Quoted source passages and linked articles remain the copyright of their publishers; they are included as short quotations for verification. Linked media and satellite images remain the rights holders' property; no image or video licence is granted by this dataset. Fonts (SIL OFL) and map data (Natural Earth, public domain) keep their own terms. City and region names in automatically published dossiers are checked against GeoNames (geonames.org, CC BY 4.0). Drone drawings and animations are schematic illustrations of a type, not evidence about any incident."
 },
 "assessmentNote": "DroneLedger assessment, not a finding. Editorial likelihood bands, not calibrated statistical confidence intervals. Unknown has no numeric probability. Outcomes are attributed reports; no totals or inference of intent from a hit.",
 "assessmentScale": {
  "version": "di-estimative-v1",
  "levels": {
   "almost_certain": {
    "low": 95,
    "high": 99
   },
   "very_likely": {
    "low": 80,
    "high": 95
   },
   "likely": {
    "low": 55,
    "high": 80
   },
   "roughly_even_chance": {
    "low": 45,
    "high": 55
   },
   "unlikely": {
    "low": 20,
    "high": 45
   },
   "very_unlikely": {
    "low": 5,
    "high": 20
   },
   "almost_no_chance": {
    "low": 1,
    "high": 5
   },
   "unknown": {
    "low": null,
    "high": null
   }
  }
 },
 "evidenceNote": "Each dossier separates three claims: drone presence, impact and attribution, each with its own evidence state and supporting sources. 'reported' means a source describes the claim without sufficient identification evidence; claims by parties to a conflict are never 'confirmed' on their own. Counts reflect dossiers in this curated archive, not all incidents worldwide. windowStart/windowEnd are reporting-window calendar bounds, not individual event days; legacy date remains the compatibility/sorting date for such records.",
 "locationNote": "lat/lon are the dossier's own approximate coordinates (see locationPrecision) and are empty when the incident location is unknown. referencePoint {lat, lon, level, name} is a display reference only: a fixed point in the named city (GeoNames), region (its administrative seat), sea or country (Natural Earth label point), derived at build time. It is not a geolocation, not an estimate of the incident location and may change when the dossier's place becomes more precise: reference point; incident location unknown.",
 "detailsNote": "media, operationalEffects, followUp and archiveEntity are editorial, source-indexed additions. Media is publisher-link only, has its own evidence status and never establishes drone presence or attribution. Debunked original-media links are removed; archived revisions omit media references. archivePattern is computed from mapped published event records at generated time, not a worldwide incident count. Null asOf means not established; publication time is not substituted.",
 "dataset": {
  "doi": "10.5281/zenodo.23345422",
  "url": "https://doi.org/10.5281/zenodo.23345422",
  "note": "Citable weekly snapshot (CSV + JSON) archived on Zenodo; this DOI always resolves to the latest version."
 },
 "howToCite": "Cite the dossier URL and revision, e.g. DroneLedger, “Wine Trader hit off Romania; president says drones struck the ship”, dossier wine-trader-fire-off-romania-2026-10-15, revision 4, updated 2026-10-15. https://droneincidents.com/incident/wine-trader-fire-off-romania-2026-10-15/",
 "incident": {
  "id": "billund-airport-drone-report-2025-09-25",
  "title": "Unverified drone report leads to early-morning Billund Airport closure",
  "place": "Billund",
  "country": "Denmark",
  "countryCode": "DK",
  "date": "2025-09-25",
  "dateKind": "event",
  "scope": "single",
  "category": "airport",
  "droneStatus": "reported",
  "impactStatus": "confirmed",
  "attributionStatus": "none",
  "lat": 55.73,
  "lon": 9.11,
  "locationPrecision": "region",
  "summary": "Billund Airport temporarily closed early on 25 September 2025 after a report of possible drone activity nearby.",
  "impact": "The later police statement gives 04:30–05:41 local time. The earlier Ritzau report describes roughly an hour and quotes the airport press chief confirming flight delays. The report concerned the surrounding area, not an established drone inside the airport.",
  "evidence": "Police supplied the sighting/investigation account; the airport press chief supplied a separate operational account to Ritzau. Early police comments said drone activity had not been demonstrated. The June 2026 national update says all district investigations concluded, mostly with drone explanations rejected and some unresolved; it does not specify this Billund event outcome.",
  "unknown": "The specific final Billund case finding is unavailable in these sources; no national aggregate outcome is assigned to this incident. No link to other airports or operator is established. Distinct from the star-related alarm on 26 September.",
  "attribution": "No operator or responsible organisation established by these sources; no criminal charge or conviction is asserted.",
  "sources": [
   {
    "label": "Southeast Jutland Police: investigation at Billund Airport",
    "url": "https://politi.dk/sydoestjyllands-politi/nyhedsliste/sydoestjyllands-politi-efterforsker-droneaktivitet-ved-billund-lufthavn/2025/09/25",
    "published": "2025-09-25",
    "family": "danish-police",
    "publishedAt": "2025-09-25T13:24:00+02:00"
   },
   {
    "label": "Ritzau / Avisen: closure and airport press-chief account",
    "url": "https://www.avisen.dk/politi-droner-er-observeret-ved-lufthavne-i-sydjyll_811255.aspx",
    "published": "2025-09-25",
    "family": "ritzau",
    "publishedAt": "2025-09-25T07:40:00+02:00"
   },
   {
    "label": "Danish National Police: investigations concluded, differing outcomes",
    "url": "https://politi.dk/rigspolitiet/nyhedsliste/politiet-har-styrket-indsatsen-paa-droneomraadet/2026/06/25",
    "published": "2026-06-25",
    "family": "danish-police",
    "publishedAt": "2026-06-25T13:24:00+02:00"
   }
  ],
  "timeline": [
   {
    "date": "2025-09-25",
    "text": "A reported sighting or alarm led to the documented airport restriction; see the source-bound claims and uncertainty below.",
    "source": 0
   }
  ],
  "droneStatusSources": [
   0,
   1
  ],
  "impactStatusSources": [
   0,
   1
  ],
  "attributionSources": [],
  "droneTypes": [],
  "claims": [
   {
    "id": "police-location",
    "axis": "drone",
    "statement": "Police describe a reported sighting near, rather than inside, the airport.",
    "quote": "i et område tæt på Billund Lufthavn, men ikke på lufthavnens område",
    "claimant": "Southeast Jutland Police",
    "originId": "billund-police-20250925",
    "relay": "direct",
    "assessment": "supports",
    "note": "Literal short passage checked in the original source; no independent confirmation inferred from republication.",
    "sourceIndex": 0,
    "quoteCheckedAt": "2026-10-15",
    "quoteTranslation": {}
   },
   {
    "id": "airport-delays",
    "axis": "impact",
    "statement": "The airport press chief confirms delays following the temporary closure.",
    "quote": "Den midlertidige lukning har medført forsinkelser på flere fly",
    "claimant": "Billund Airport",
    "originId": "billund-airport-20250925",
    "relay": "relayed",
    "assessment": "supports",
    "note": "Literal short passage checked in the original source; no independent confirmation inferred from republication.",
    "sourceIndex": 1,
    "quoteCheckedAt": "2026-10-15",
    "quoteTranslation": {}
   }
  ],
  "review": "editor",
  "checkedAt": "2026-10-15",
  "autoCheckedAt": null,
  "updatedAt": "2026-10-15",
  "revision": 1,
  "series": [],
  "windowStart": null,
  "windowEnd": null,
  "windowBasis": null,
  "assessment": null,
  "outcome": [],
  "assessment_scale_version": null,
  "assessment_operator_subject": null,
  "assessment_operator_level": null,
  "assessment_operator_range_low": null,
  "assessment_operator_range_high": null,
  "assessment_target_subject": null,
  "assessment_target_level": null,
  "assessment_target_range_low": null,
  "assessment_target_range_high": null,
  "assessment_droneType_subject": null,
  "assessment_droneType_level": null,
  "assessment_droneType_range_low": null,
  "assessment_droneType_range_high": null,
  "media": [],
  "operationalEffects": [],
  "followUp": [],
  "archiveEntity": {
   "key": "billund-airport",
   "kind": "airport",
   "label": "Billund Airport",
   "sourceIndex": 1
  },
  "namedLocation": null,
  "publisherMedia": [],
  "archivePattern": {
   "asOf": "2026-10-15T21:15:15+00:00",
   "entityKey": "billund-airport",
   "windows": [
    {
     "days": 30,
     "records": []
    },
    {
     "days": 90,
     "records": []
    }
   ],
   "note": "Only published archive records with an editorial entity mapping; unassigned records excluded. Not all real-world incidents or a common cause. No same-day matching."
  },
  "impactReports": [],
  "corroboration": "curated",
  "interceptionReported": {
   "evidenceState": "reported",
   "note": "Official aggregate claims, not independently verified kills. Parts are included only when explicitly sourced and sum to the reported total. Catalogue countermeasures are not incident evidence.",
   "counts": []
  },
  "referencePoint": null,
  "labels": {
   "category": "Airport disruption",
   "droneStatus": "Reported",
   "impactStatus": "Confirmed",
   "attributionStatus": "Not established"
  },
  "url": "https://droneincidents.com/incident/billund-airport-drone-report-2025-09-25/",
  "citation": "DroneLedger, “Unverified drone report leads to early-morning Billund Airport closure”, dossier billund-airport-drone-report-2025-09-25, revision 1, updated 2026-10-15. https://droneincidents.com/incident/billund-airport-drone-report-2025-09-25/",
  "history": [
   {
    "revision": 1,
    "date": "2026-10-15",
    "at": "2026-10-15T19:10:08.816+00:00",
    "note": "Curated dossier created after checking the cited sources line by line."
   }
  ]
 }
}