{
  "study": "Stage 04 RF pad before / after",
  "basis": "Independent teaching assumptions, not manufacturer data; no experimental calibration or validation",
  "comparison": "Before = frozen Stage 03 combined case, no pad. After = same 2 W battery + 1.75 W electronics, 25 C ambient, exterior losses, timing, geometry and contacts, except the RF pad replaces its footprint of the air/radiation gap. Pad mass and internal conduction are added. The three source cases below are also run internally for source-superposition verification; the published comparison uses combined heat in both configurations.",
  "pad": {
    "footprint_global_mm": [
      47,
      54,
      63,
      59
    ],
    "bottom_z_mm": 4.8,
    "installed_thickness_mm": 2.2,
    "k_W_mK": 3.0,
    "rho_kg_m3": 2200,
    "cp_J_kgK": 1000,
    "contact_resistance_each_m2K_W": 0.0002,
    "basis": "Illustrative compressed pad, not a selected commercial product; pressure, compression mechanics and temperature dependence are unresolved"
  },
  "pad_area_mm2": 80.0,
  "pad_capacity_J_K": 0.3872000000000001,
  "pad_mass_g": 0.3872,
  "pad_bulk_resistance_K_W": 9.166666666666668,
  "two_contacts_resistance_K_W": 5.000000000000001,
  "midplane_to_midplane_path_resistance_K_W": 26.66666666666667,
  "removed_air_gap_conductance_W_K": 0.0012457490603185962,
  "before_nodes": 9683,
  "after_nodes": 9710,
  "pad_nodes": 27,
  "fine_nodes": 37236,
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      "at_600s_min_C": 38.03847545551563,
      "at_600s_mean_C": 41.044596716080555,
      "at_600s_max_C": 47.25286125129297,
      "max_over_saved_times_C": 47.25286125129297,
      "at_1800s_mean_C": 26.795735068147962
    },
    "MainPCB": {
      "at_600s_min_C": 40.789857570003484,
      "at_600s_mean_C": 46.06975218440799,
      "at_600s_max_C": 51.413406756975604,
      "max_over_saved_times_C": 51.413406756975604,
      "at_1800s_mean_C": 26.642155998656754
    },
    "RFPCB": {
      "at_600s_min_C": 58.40342882140691,
      "at_600s_mean_C": 62.103696975726415,
      "at_600s_max_C": 64.69814225319317,
      "max_over_saved_times_C": 64.69814225319317,
      "at_1800s_mean_C": 26.663835911327713
    },
    "Midplate": {
      "at_600s_min_C": 36.53707672431968,
      "at_600s_mean_C": 39.32992887444907,
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      "at_1800s_mean_C": 26.654354318229753
    },
    "Frame": {
      "at_600s_min_C": 36.32985971013513,
      "at_600s_mean_C": 38.06109548377233,
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      "at_1800s_mean_C": 26.600392175009876
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    "Display": {
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    "BackGlass": {
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    "U03": {
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    "U04": {
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    "U05": {
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    "U06": {
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    "U07": {
      "at_600s_min_C": 68.51887966762696,
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  "after": {
    "Battery": {
      "at_600s_min_C": 37.92847672087009,
      "at_600s_mean_C": 40.94255524650772,
      "at_600s_max_C": 47.15588129849347,
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      "at_1800s_mean_C": 26.79630503826651
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    "MainPCB": {
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    "RFPCB": {
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    "Midplate": {
      "at_600s_min_C": 36.41946215094783,
      "at_600s_mean_C": 39.21357856437146,
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    "Frame": {
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    "U03": {
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  "verification": {
    "baseline_float32_byte_identical_to_stage03": true,
    "old_capacities_sources_and_external_sinks_identical": true,
    "unmodified_links_identical": true,
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  "physical_validation": false,
  "pad_representation": "One through-thickness temperature per planar pad control volume, finite mass, in-plane conduction and two resistive contacts; no compression mechanics",
  "runtime_s": 27.32448812504299
}