{
  "version": 1,
  "time": {
    "year": 1948,
    "month": 7,
    "day": 24,
    "hour": 2,
    "minute": 45
  },
  "durationSeconds": 10,
  "utcOffsetHours": -6,
  "place": [
    {
      "lat": 32.3792,
      "lng": -86.3077
    }
  ],
  "witness": {
    "id": "chiles",
    "title": "Clarence Chiles"
  },
  "caseId": "ChilesWhitted",
  "description": "Version du commandant Clarence S. Chiles, en place gauche. Vue depuis le poste de pilotage du DC-3 à 1500 m — d'où le sol, très bas, et le ciel de nuit du 24 juillet 1948. L'objet arrive de face sur une trajectoire de collision et passe sur la droite ; Chiles vire à gauche pour l'éviter, et voit la ressource abrupte. Son témoignage s'arrête là : d'après le recoupement de McDonald (1968), seul Whitted, en place droite, a vu la phase finale. L'objet quitte donc simplement son champ de vision après la ressource, sans que rien ne soit déclaré sur un nuage — McDonald précise que le « disparu dans la couche » des premiers interrogatoires est une reconstruction, démentie par Whitted. Distance : les deux hommes n'ont jamais pu s'accorder (l'un sous 1000 ft, l'autre plusieurs fois cela), et McDonald ne dit pas lequel disait quoi. L'enregistrement ne tranche pas, et ne le peut pas : il ne déclare que des tailles angulaires, et une distance ne s'en déduit que là où l'objet croise un élément de décor dont la position est connue — ce qu'un ciel de nuit vide n'offre nulle part. Le dessin suit le cadrage du relevé officiel (~180 m au plus près), qui reste donc un choix de mise en scène et non une affirmation du fichier. Forme d'après le dessin que Chiles lui-même a remis au projet Sign (Blue Book, rapport n° 14, cas 5) : un cigare mince effilé aux deux bouts, sans aucun hublot, avec à l'avant la zone claire qu'il annote « pare-brise de cockpit ? ». Les nervures transversales de son croquis ne sont pas rendues : ce format dessine des formes, pas un état de surface. La flamme suit les 40 pieds que Whitted a portés sur son propre dessin, seul chiffre de témoin la concernant : Chiles n'en a annoté aucun, et rien au dossier ne dit qu'ils divergeaient là-dessus. Longueur rapportée ~30 m ; sa longueur apparente croît à mesure qu'il se présente de profil. Le virage d'évitement n'est pas reproduit : le format ne sait pas encore incliner le point de vue (roulis).",
  "tags": [
    "NL",
    "observation aérienne",
    "Projet Sign"
  ],
  "timeline": {
    "keyframes": [
      {
        "t": 0,
        "shapes": [
          {
            "sourceId": "ufo-1",
            "shape": {
              "kind": "oval",
              "bounds": {
                "x": 331.0,
                "y": 173.5,
                "width": 2.1,
                "height": 0.7
              },
              "color": "#1c3f9c",
              "angle": 0,
              "transparency": 0.0,
              "haloScale": 0.8,
              "selected": false,
              "title": "Fuselage",
              "angular": {
                "widthDeg": 0.3492,
                "heightDeg": 0.1103
              }
            }
          },
          {
            "sourceId": "flamme",
            "shape": {
              "kind": "oval",
              "bounds": {
                "x": 333.1,
                "y": 173.6,
                "width": 0.3,
                "height": 0.7
              },
              "color": "#ff5a1f",
              "angle": 0,
              "transparency": 0.1,
              "haloScale": 1.6,
              "selected": false,
              "title": "Flamme arrière",
              "angular": {
                "widthDeg": 0.0551,
                "heightDeg": 0.1103
              }
            }
          },
          {
            "sourceId": "pare-brise",
            "shape": {
              "kind": "oval",
              "bounds": {
                "x": 331.0,
                "y": 173.6,
                "width": 0.2,
                "height": 0.6
              },
              "color": "#fff6d0",
              "angle": 0,
              "transparency": 1.0,
              "haloScale": 0.6,
              "selected": false,
              "title": "Pare-brise ?",
              "angular": {
                "widthDeg": 0.0368,
                "heightDeg": 0.0919
              }
            }
          }
        ]
      },
      {
        "t": 1500,
        "shapes": [
          {
            "sourceId": "ufo-1",
            "shape": {
              "kind": "oval",
              "bounds": {
                "x": 332.8,
                "y": 173.5,
                "width": 3.0,
                "height": 0.9
              },
              "color": "#1c3f9c",
              "angle": 0,
              "transparency": 0.0,
              "haloScale": 0.8,
              "selected": false,
              "title": "Fuselage",
              "angular": {
                "widthDeg": 0.4962,
                "heightDeg": 0.147
              }
            }
          },
          {
            "sourceId": "flamme",
            "shape": {
              "kind": "oval",
              "bounds": {
                "x": 335.6,
                "y": 173.5,
                "width": 0.4,
                "height": 0.9
              },
              "color": "#ff5a1f",
              "angle": 0,
              "transparency": 0.1,
              "haloScale": 1.6,
              "selected": false,
              "title": "Flamme arrière",
              "angular": {
                "widthDeg": 0.0735,
                "heightDeg": 0.147
              }
            }
          },
          {
            "sourceId": "pare-brise",
            "shape": {
              "kind": "oval",
              "bounds": {
                "x": 332.8,
                "y": 173.6,
                "width": 0.3,
                "height": 0.8
              },
              "color": "#fff6d0",
              "angle": 0,
              "transparency": 1.0,
              "haloScale": 0.6,
              "selected": false,
              "title": "Pare-brise ?",
              "angular": {
                "widthDeg": 0.0551,
                "heightDeg": 0.1286
              }
            }
          }
        ]
      },
      {
        "t": 3000,
        "shapes": [
          {
            "sourceId": "ufo-1",
            "shape": {
              "kind": "oval",
              "bounds": {
                "x": 337.1,
                "y": 173.4,
                "width": 5.2,
                "height": 1.5
              },
              "color": "#1c3f9c",
              "angle": 0,
              "transparency": 0.0,
              "haloScale": 0.8,
              "selected": false,
              "title": "Fuselage",
              "angular": {
                "widthDeg": 0.8637,
                "heightDeg": 0.2573
              }
            }
          },
          {
            "sourceId": "flamme",
            "shape": {
              "kind": "oval",
              "bounds": {
                "x": 341.9,
                "y": 173.3,
                "width": 0.8,
                "height": 1.5
              },
              "color": "#ff5a1f",
              "angle": 0,
              "transparency": 0.1,
              "haloScale": 1.6,
              "selected": false,
              "title": "Flamme arrière",
              "angular": {
                "widthDeg": 0.1286,
                "heightDeg": 0.2573
              }
            }
          },
          {
            "sourceId": "pare-brise",
            "shape": {
              "kind": "oval",
              "bounds": {
                "x": 337.1,
                "y": 173.4,
                "width": 0.6,
                "height": 1.4
              },
              "color": "#fff6d0",
              "angle": 0,
              "transparency": 1.0,
              "haloScale": 0.6,
              "selected": false,
              "title": "Pare-brise ?",
              "angular": {
                "widthDeg": 0.0919,
                "heightDeg": 0.2389
              }
            }
          }
        ]
      },
      {
        "t": 4000,
        "shapes": [
          {
            "sourceId": "ufo-1",
            "shape": {
              "kind": "oval",
              "bounds": {
                "x": 341.5,
                "y": 174.3,
                "width": 15.1,
                "height": 2.3
              },
              "color": "#1c3f9c",
              "angle": 0,
              "transparency": 0.0,
              "haloScale": 0.8,
              "selected": false,
              "title": "Fuselage",
              "angular": {
                "widthDeg": 2.5173,
                "heightDeg": 0.3859
              }
            }
          },
          {
            "sourceId": "flamme",
            "shape": {
              "kind": "oval",
              "bounds": {
                "x": 355.8,
                "y": 174.4,
                "width": 2.4,
                "height": 2.3
              },
              "color": "#ff5a1f",
              "angle": 0,
              "transparency": 0.1,
              "haloScale": 1.6,
              "selected": false,
              "title": "Flamme arrière",
              "angular": {
                "widthDeg": 0.4043,
                "heightDeg": 0.3859
              }
            }
          },
          {
            "sourceId": "pare-brise",
            "shape": {
              "kind": "oval",
              "bounds": {
                "x": 341.6,
                "y": 174.4,
                "width": 1.5,
                "height": 2.1
              },
              "color": "#fff6d0",
              "angle": 0,
              "transparency": 0.0,
              "haloScale": 0.6,
              "selected": false,
              "title": "Pare-brise ?",
              "angular": {
                "widthDeg": 0.2573,
                "heightDeg": 0.3492
              }
            }
          }
        ]
      },
      {
        "t": 5000,
        "shapes": [
          {
            "sourceId": "ufo-1",
            "shape": {
              "kind": "oval",
              "bounds": {
                "x": 324.8,
                "y": 176.6,
                "width": 27.8,
                "height": 4.2
              },
              "color": "#1c3f9c",
              "angle": 0,
              "transparency": 0.0,
              "haloScale": 0.8,
              "selected": false,
              "title": "Fuselage",
              "angular": {
                "widthDeg": 4.6286,
                "heightDeg": 0.6983
              }
            }
          },
          {
            "sourceId": "flamme",
            "shape": {
              "kind": "oval",
              "bounds": {
                "x": 347.0,
                "y": 176.6,
                "width": 11.1,
                "height": 4.2
              },
              "color": "#ff5a1f",
              "angle": 0,
              "transparency": 0.1,
              "haloScale": 1.6,
              "selected": false,
              "title": "Flamme arrière",
              "angular": {
                "widthDeg": 1.856,
                "heightDeg": 0.6983
              }
            }
          },
          {
            "sourceId": "pare-brise",
            "shape": {
              "kind": "oval",
              "bounds": {
                "x": 324.9,
                "y": 176.8,
                "width": 2.8,
                "height": 3.7
              },
              "color": "#fff6d0",
              "angle": 0,
              "transparency": 0.0,
              "haloScale": 0.6,
              "selected": false,
              "title": "Pare-brise ?",
              "angular": {
                "widthDeg": 0.4594,
                "heightDeg": 0.6248
              }
            }
          }
        ]
      },
      {
        "t": 5800,
        "shapes": [
          {
            "sourceId": "ufo-1",
            "shape": {
              "kind": "oval",
              "bounds": {
                "x": 330.5,
                "y": 168.5,
                "width": 49.2,
                "height": 5.3
              },
              "color": "#1c3f9c",
              "angle": 0,
              "transparency": 0.0,
              "haloScale": 0.8,
              "selected": false,
              "title": "Fuselage",
              "angular": {
                "widthDeg": 8.2008,
                "heightDeg": 0.8821
              }
            }
          },
          {
            "sourceId": "flamme",
            "shape": {
              "kind": "oval",
              "bounds": {
                "x": 369.3,
                "y": 168.5,
                "width": 19.7,
                "height": 5.3
              },
              "color": "#ff5a1f",
              "angle": 0,
              "transparency": 0.1,
              "haloScale": 1.6,
              "selected": false,
              "title": "Flamme arrière",
              "angular": {
                "widthDeg": 3.2887,
                "heightDeg": 0.8821
              }
            }
          },
          {
            "sourceId": "pare-brise",
            "shape": {
              "kind": "oval",
              "bounds": {
                "x": 330.6,
                "y": 168.8,
                "width": 5.0,
                "height": 4.7
              },
              "color": "#fff6d0",
              "angle": 0,
              "transparency": 0.0,
              "haloScale": 0.6,
              "selected": false,
              "title": "Pare-brise ?",
              "angular": {
                "widthDeg": 0.827,
                "heightDeg": 0.7902
              }
            }
          }
        ]
      },
      {
        "t": 6500,
        "shapes": [
          {
            "sourceId": "ufo-1",
            "shape": {
              "kind": "oval",
              "bounds": {
                "x": 346.8,
                "y": 158.9,
                "width": 56.3,
                "height": 6.0
              },
              "color": "#1c3f9c",
              "angle": 0,
              "transparency": 0.0,
              "haloScale": 0.8,
              "selected": false,
              "title": "Fuselage",
              "angular": {
                "widthDeg": 9.3883,
                "heightDeg": 0.9924
              }
            }
          },
          {
            "sourceId": "flamme",
            "shape": {
              "kind": "oval",
              "bounds": {
                "x": 390.8,
                "y": 159.1,
                "width": 22.6,
                "height": 6.1
              },
              "color": "#ff5a1f",
              "angle": 0,
              "transparency": 0.1,
              "haloScale": 1.6,
              "selected": false,
              "title": "Flamme arrière",
              "angular": {
                "widthDeg": 3.7661,
                "heightDeg": 1.0107
              }
            }
          },
          {
            "sourceId": "pare-brise",
            "shape": {
              "kind": "oval",
              "bounds": {
                "x": 347.1,
                "y": 159.0,
                "width": 5.6,
                "height": 5.4
              },
              "color": "#fff6d0",
              "angle": 0,
              "transparency": 0.0,
              "haloScale": 0.6,
              "selected": false,
              "title": "Pare-brise ?",
              "angular": {
                "widthDeg": 0.9372,
                "heightDeg": 0.9005
              }
            }
          }
        ]
      },
      {
        "t": 8000,
        "shapes": [
          {
            "sourceId": "ufo-1",
            "shape": {
              "kind": "oval",
              "bounds": {
                "x": 361.4,
                "y": 141.9,
                "width": 27.6,
                "height": 2.9
              },
              "color": "#1c3f9c",
              "angle": 0,
              "transparency": 0.0,
              "haloScale": 0.8,
              "selected": false,
              "title": "Fuselage",
              "angular": {
                "widthDeg": 4.5919,
                "heightDeg": 0.4778
              }
            }
          },
          {
            "sourceId": "flamme",
            "shape": {
              "kind": "oval",
              "bounds": {
                "x": 383.0,
                "y": 142.0,
                "width": 11.0,
                "height": 3.0
              },
              "color": "#ff5a1f",
              "angle": 0,
              "transparency": 0.1,
              "haloScale": 1.6,
              "selected": false,
              "title": "Flamme arrière",
              "angular": {
                "widthDeg": 1.8376,
                "heightDeg": 0.4962
              }
            }
          },
          {
            "sourceId": "pare-brise",
            "shape": {
              "kind": "oval",
              "bounds": {
                "x": 361.7,
                "y": 142.0,
                "width": 2.8,
                "height": 2.5
              },
              "color": "#fff6d0",
              "angle": 0,
              "transparency": 0.0,
              "haloScale": 0.6,
              "selected": false,
              "title": "Pare-brise ?",
              "angular": {
                "widthDeg": 0.4594,
                "heightDeg": 0.4227
              }
            }
          }
        ]
      },
      {
        "t": 8800,
        "shapes": [
          {
            "sourceId": "ufo-1",
            "shape": {
              "kind": "oval",
              "bounds": {
                "x": 361.4,
                "y": 141.9,
                "width": 27.6,
                "height": 2.9
              },
              "color": "#1c3f9c",
              "angle": 0,
              "transparency": 1,
              "haloScale": 0.8,
              "selected": false,
              "title": "Fuselage",
              "angular": {
                "widthDeg": 4.5919,
                "heightDeg": 0.4778
              }
            }
          },
          {
            "sourceId": "flamme",
            "shape": {
              "kind": "oval",
              "bounds": {
                "x": 383.0,
                "y": 142.0,
                "width": 11.0,
                "height": 3.0
              },
              "color": "#ff5a1f",
              "angle": 0,
              "transparency": 1,
              "haloScale": 1.6,
              "selected": false,
              "title": "Flamme arrière",
              "angular": {
                "widthDeg": 1.8376,
                "heightDeg": 0.4962
              }
            }
          },
          {
            "sourceId": "pare-brise",
            "shape": {
              "kind": "oval",
              "bounds": {
                "x": 361.7,
                "y": 142.0,
                "width": 2.8,
                "height": 2.5
              },
              "color": "#fff6d0",
              "angle": 0,
              "transparency": 1,
              "haloScale": 0.6,
              "selected": false,
              "title": "Pare-brise ?",
              "angular": {
                "widthDeg": 0.4594,
                "heightDeg": 0.4227
              }
            }
          }
        ]
      },
      {
        "t": 10000,
        "shapes": [
          {
            "sourceId": "ufo-1",
            "shape": {
              "kind": "oval",
              "bounds": {
                "x": 361.4,
                "y": 141.9,
                "width": 27.6,
                "height": 2.9
              },
              "color": "#1c3f9c",
              "angle": 0,
              "transparency": 1,
              "haloScale": 0.8,
              "selected": false,
              "title": "Fuselage",
              "angular": {
                "widthDeg": 4.5919,
                "heightDeg": 0.4778
              }
            }
          },
          {
            "sourceId": "flamme",
            "shape": {
              "kind": "oval",
              "bounds": {
                "x": 383.0,
                "y": 142.0,
                "width": 11.0,
                "height": 3.0
              },
              "color": "#ff5a1f",
              "angle": 0,
              "transparency": 1,
              "haloScale": 1.6,
              "selected": false,
              "title": "Flamme arrière",
              "angular": {
                "widthDeg": 1.8376,
                "heightDeg": 0.4962
              }
            }
          },
          {
            "sourceId": "pare-brise",
            "shape": {
              "kind": "oval",
              "bounds": {
                "x": 361.7,
                "y": 142.0,
                "width": 2.8,
                "height": 2.5
              },
              "color": "#fff6d0",
              "angle": 0,
              "transparency": 1,
              "haloScale": 0.6,
              "selected": false,
              "title": "Pare-brise ?",
              "angular": {
                "widthDeg": 0.4594,
                "heightDeg": 0.4227
              }
            }
          }
        ]
      }
    ],
    "order": [
      "flamme",
      "ufo-1",
      "pare-brise"
    ],
    "groups": []
  },
  "witnessTrack": {
    "keyframes": [
      {
        "t": 0,
        "pose": {
          "lat": 32.3792,
          "lng": -86.3077,
          "elevationM": 1500.0,
          "headingDeg": 40.0,
          "pitchDeg": 0.0,
          "fovDeg": 60.0
        }
      },
      {
        "t": 1500,
        "pose": {
          "lat": 32.3792,
          "lng": -86.3077,
          "elevationM": 1500.0,
          "headingDeg": 40.0,
          "pitchDeg": 0.0,
          "fovDeg": 60.0
        }
      },
      {
        "t": 3000,
        "pose": {
          "lat": 32.3792,
          "lng": -86.3077,
          "elevationM": 1500.0,
          "headingDeg": 40.0,
          "pitchDeg": 0.0,
          "fovDeg": 60.0
        }
      },
      {
        "t": 4000,
        "pose": {
          "lat": 32.3792,
          "lng": -86.3077,
          "elevationM": 1500.0,
          "headingDeg": 41.76,
          "pitchDeg": 0.27,
          "fovDeg": 60.0
        }
      },
      {
        "t": 5000,
        "pose": {
          "lat": 32.3792,
          "lng": -86.3077,
          "elevationM": 1500.0,
          "headingDeg": 52.51,
          "pitchDeg": 0.88,
          "fovDeg": 60.0
        }
      },
      {
        "t": 5800,
        "pose": {
          "lat": 32.3792,
          "lng": -86.3077,
          "elevationM": 1500.0,
          "headingDeg": 63.56,
          "pitchDeg": 5.79,
          "fovDeg": 60.0
        }
      },
      {
        "t": 6500,
        "pose": {
          "lat": 32.3792,
          "lng": -86.3077,
          "elevationM": 1500.0,
          "headingDeg": 77.83,
          "pitchDeg": 11.42,
          "fovDeg": 60.0
        }
      },
      {
        "t": 8000,
        "pose": {
          "lat": 32.3792,
          "lng": -86.3077,
          "elevationM": 1500.0,
          "headingDeg": 81.95,
          "pitchDeg": 23.0,
          "fovDeg": 60.0
        }
      },
      {
        "t": 10000,
        "pose": {
          "lat": 32.3792,
          "lng": -86.3077,
          "elevationM": 1500.0,
          "headingDeg": 81.95,
          "pitchDeg": 26.59,
          "fovDeg": 60.0
        }
      }
    ]
  },
  "weatherTrack": {
    "keyframes": [
      {
        "t": 0,
        "weather": {
          "cloudCover": 0.012499999999999997,
          "cloudDarkness": 0.38000000000000006,
          "precipitationType": "none",
          "precipitationIntensity": 0,
          "windDirectionDeg": 162.75,
          "windSpeed": 1.4425,
          "storm": false
        }
      },
      {
        "t": 10000,
        "weather": {
          "cloudCover": 0.012361111111111114,
          "cloudDarkness": 0.38,
          "precipitationType": "none",
          "precipitationIntensity": 0,
          "windDirectionDeg": 162.7638888888889,
          "windSpeed": 1.4426944444444443,
          "storm": false
        }
      }
    ]
  },
  "decor": [],
  "weatherSource": {
    "id": "era5",
    "name": "ERA5 (Open-Meteo)",
    "url": "https://archive-api.open-meteo.com/v1/archive?latitude=32.3792&longitude=-86.3077&start_date=1948-07-24&end_date=1948-07-24&hourly=cloud_cover%2Ccloud_cover_low%2Ccloud_cover_mid%2Ccloud_cover_high%2Cprecipitation%2Csnowfall%2Cweather_code%2Cwind_speed_10m%2Cwind_direction_10m%2Ctemperature_2m%2Cdew_point_2m&wind_speed_unit=ms&timezone=UTC"
  },
  "instrument": "eye"
}
