{
  "methodVersion": "1.0",
  "resourceRelease": "268",
  "activity": "https://darksciencedocs.com/scale-lab/",
  "sourceReviewDate": "2026-10-25",
  "provenance": "Pinned unit definitions and rounded reference distances; generated static propagation comparisons from the unchanged Scale Lab. Not live ephemerides, telemetry or observed communication timing.",
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    "julianYearSeconds": 31557600.0,
    "lightYearKm": 9460730472580.799,
    "earthTeachingRadiusAu": 1,
    "marsTeachingRadiusAu": 1.524
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      "oneWayJulianYears": 4.0631112059906224e-08,
      "immediateReplyJulianYears": 8.126222411981245e-08,
      "geometryOnlyBlocked": false,
      "unitChecks": [
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          "unit": "km",
          "inputDistance": 384400.0,
          "repeatedOneWaySeconds": 1.2822203819416966
        },
        {
          "unit": "mi",
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        {
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        {
          "unit": "ly",
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      ]
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    {
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      "separationMiles": 932056.7883560009,
      "separationAu": 0.01002688068340267,
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      "oneWayJulianYears": 1.5855012510369235e-07,
      "immediateReplyJulianYears": 3.171002502073847e-07,
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    {
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      "separationKm": 78389284.24679999,
      "separationMiles": 48708843.01106537,
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      "case": "4",
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      "separationKm": 377585025.6468,
      "separationMiles": 234620457.55711642,
      "separationAu": 2.524,
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      "immediateReplySeconds": 2518.9761488049176,
      "oneWayJulianYears": 3.991076870238734e-05,
      "immediateReplyJulianYears": 7.982153740477469e-05,
      "geometryOnlyBlocked": true,
      "unitChecks": [
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          "repeatedOneWaySeconds": 1259.4880744024588
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    },
    {
      "case": "5",
      "destination": "proxima-centauri",
      "alignment": "near",
      "separationKm": 40113497203742.586,
      "separationMiles": 24925371582298.492,
      "separationAu": 268142.166837289,
      "oneWaySeconds": 133804223.99999999,
      "immediateReplySeconds": 267608447.99999997,
      "oneWayJulianYears": 4.239999999999999,
      "immediateReplyJulianYears": 8.479999999999999,
      "geometryOnlyBlocked": false,
      "unitChecks": [
        {
          "unit": "km",
          "inputDistance": 40113497203742.586,
          "repeatedOneWaySeconds": 133804223.99999999
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        {
          "unit": "mi",
          "inputDistance": 24925371582298.492,
          "repeatedOneWaySeconds": 133804223.99999999
        },
        {
          "unit": "au",
          "inputDistance": 268142.166837289,
          "repeatedOneWaySeconds": 133804223.99999999
        },
        {
          "unit": "ly",
          "inputDistance": 4.24,
          "repeatedOneWaySeconds": 133804223.99999999
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      ]
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  ],
  "workedMarsNear": {
    "case": "3",
    "nearSeparationAu": 0.524,
    "roundTripWith30SecondRemoteWait": 552.9570134602919,
    "remoteWaitSeconds": 30
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  "checks": {
    "referenceSha256": "6858bc9522ff1471bfe4f8c2e3345e50dd9c4a2af47e81ca49016cb008f8842a",
    "generatedCasesSha256": "38fc2154039a41e9128ba58053c6ec6eaa7ba4f85891ebbef83f65d824b9dc0c",
    "allCasesAndFourUnitRepresentationsAgree": true
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  "limits": "Constant sender-receiver separation, straight vacuum path, instantaneous hypothetical reply. No live positions, orbital motion during exchange, mission scheduling, processing, transmission duration, plasma or relativistic corrections. Mars uses chosen circular radii1/1.524AU, not actual extrema; the Sun blocks a direct path at exact opposite-side alignment. Rounded mean Moon and L2 references are not actual surface/spacecraft ranges. Proxima extension assumes hypothetical receiver and static separation; no detection or inhabited-system claim. Additional digits describe arithmetic, not physical precision."
}