{
  "modelId": "gd1977-cuberoot-extended-v3",
  "reviewedDate": "2026-10-27",
  "status": "source-consistency-reviewed; above 1000 kt: ideal-atmosphere similarity extrapolation; independent physical validation pending",
  "sources": [
    {
      "url": "https://www.atomicarchive.com/resources/documents/effects/glasstone-dolan/chapter3.html",
      "sections": [
        "3.61–3.64",
        "3.73–3.74"
      ],
      "role": "1977 primary publication transcript; fixed-geometry cube-root similarity and assumptions"
    },
    {
      "url": "https://www.atomicarchive.com/resources/documents/effects/glasstone-dolan/figures/fig03-73c.png",
      "role": "Manual readings at scaled heights 0 and 500 ft"
    },
    {
      "url": "https://www.dtra.mil/Portals/125/Documents/NTPR/newDocs/NTREReport/35_DTRA-TR-09-15_Derivation_of_Effective_Resuspension_Factors_NTS.pdf",
      "printedPages": [
        7,
        9
      ],
      "pdfPages": [
        16,
        19
      ],
      "role": "Same-source chart reproduction and worked scaling example, not an independent physical model"
    }
  ],
  "correctionFromV5": {
    "burst": "air",
    "pressurePsi": 1,
    "oldReferenceFeet": 5500,
    "reviewedReferenceFeet": 5300,
    "differencePercent": -3.6363636364
  },
  "manualReadingsFeet": {
    "surface": [
      {
        "psi": 1,
        "value": 3800,
        "readingBracket": [
          3750,
          3900
        ]
      },
      {
        "psi": 4,
        "value": 1650,
        "readingBracket": [
          1600,
          1700
        ]
      },
      {
        "psi": 15,
        "value": 800,
        "readingBracket": [
          750,
          850
        ]
      }
    ],
    "air500ScaledFeet": [
      {
        "psi": 1,
        "value": 5300,
        "readingBracket": [
          5200,
          5400
        ]
      },
      {
        "psi": 4,
        "value": 2200,
        "readingBracket": [
          2150,
          2250
        ]
      },
      {
        "psi": 15,
        "value": 1100,
        "readingBracket": [
          1050,
          1150
        ]
      }
    ]
  },
  "readingBracketMeaning": "Approximate visual interpretation of line width and graph ticks only; not a statistical confidence interval or real-world prediction bound.",
  "checkedExample": {
    "source": "DTRA-TR-09-15 printed page 7, section 2.1",
    "yieldKt": 31,
    "scaledHeightFeet": 418,
    "reportedHeightFeet": 1314,
    "scaledDistanceFeet": 1700,
    "reportedDistanceFeetApprox": 5300,
    "scope": "Generic similarity scaling only; this example does not independently verify the application's fixed 500 ft readings."
  },
  "domain": {
    "supportedYieldKt": [
      1,
      50000
    ],
    "fixedScaledHeightFeet": {
      "surface": 0,
      "air": 500
    },
    "maximumUncorrectedHeightFeet": 5000,
    "note": "Above 1000 kt: same-reading cube-root extrapolation in an ideal homogeneous atmosphere, not independently physically validated. High airburst altitudes are not corrected; labelled explicitly.",
    "sourceReviewedYieldKt": [
      1,
      1000
    ],
    "extrapolatedYieldKt": [
      1000,
      50000
    ]
  },
  "assumptions": [
    "Idealized sea-level homogeneous atmosphere",
    "Nearly ideal flat surface",
    "Similar geometry under yield scaling"
  ],
  "notModeled": [
    "Urban shielding and detailed reflections",
    "Terrain and meteorology",
    "Structural response",
    "Population and casualties",
    "Thermal and ionizing radiation",
    "Fallout"
  ],
  "visualEffects": "Artistic animation, independently size-limited; never use the 15-second timeline or deformed buildings to infer physical consequences.",
  "sameSourceFitComparison": {
    "source": "https://conferences.ctbto.org/event/7/contributions/896/attachments/323/809/P2.1-195_Tibuleac.pdf#page=7",
    "authors": "Ileana Tibuleac and Thomas VanDeMark",
    "method": "Natural-log fit for 1 kt zero-height reference; PDF pages 7–8",
    "rows": [
      {
        "psi": 1,
        "manualFeet": 3800,
        "fittedFeet": 3822.3170486140757,
        "differencePercent": -0.5838617867182871
      },
      {
        "psi": 4,
        "manualFeet": 1650,
        "fittedFeet": 1714.5657623359234,
        "differencePercent": -3.765720962954433
      },
      {
        "psi": 15,
        "manualFeet": 800,
        "fittedFeet": 798.3450864629983,
        "differencePercent": 0.20729300712973853
      }
    ],
    "meaning": "Differences between two approximations of the same source chart. These percentages are NOT real-world model accuracy or confidence limits."
  }
}