{
  "frequency_hz": null,
  "frequency_description": "Frequency-independent image-current approximation; no excitation frequency was specified or swept. Not a 0 Hz DC or frequency-domain EM solve.",
  "model": "Conservative multilayer image-current field projected onto connected ground sheet, trace and plated-via graph",
  "traces": 47,
  "contact_cases_per_trace": 2,
  "total_experiments": 94,
  "current_A": 0.01,
  "ground_net": "GND (source_net_56)",
  "cell_size_mm": 0.25,
  "contact_radius_mm": 0.6,
  "via_plating_radial_thickness_mm": 0.025,
  "board_thickness_mm": 1.6,
  "stackup": [
    {
      "layer": "top",
      "z_mm": 0,
      "copper_thickness_mm": 0.035
    },
    {
      "layer": "inner1",
      "z_mm": 0.2,
      "copper_thickness_mm": 0.035
    },
    {
      "layer": "inner2",
      "z_mm": 1.4,
      "copper_thickness_mm": 0.035
    },
    {
      "layer": "bottom",
      "z_mm": 1.6,
      "copper_thickness_mm": 0.035
    }
  ],
  "bounds_mm": {
    "minX": -23,
    "maxX": 11,
    "minY": -39.5,
    "maxY": 3.5
  },
  "relative_residual_tolerance": 1e-08,
  "maximum_iterations": 15000,
  "maximum_current_balance_error_A": 8.180391317739317e-11,
  "ground_vias_in_region": 67,
  "ground_nodes": 21430,
  "ground_plane_cells": 21005,
  "contacts": "Return source at memory package GND pin; return sink at processor package GND pin. Compare nearest and second-nearest GND pins to each signal pad.",
  "display": {
    "density_scale_A_per_mm2": [
      0,
      0.15
    ],
    "interpolation": "Bilinear between computed density samples, display only",
    "earlier_aggregate_mesh_mm": 0.5
  },
  "omitted_effects": [
    "Frequency-dependent impedance, skin and proximity effects",
    "Wave propagation and switching waveform",
    "Package impedance and actual distribution among GND contacts",
    "Power-plane displacement current and return through decoupling capacitors",
    "Magnetic coupling of signal via barrels"
  ],
  "source_board": "https://tscircuit.com/astra/am3352-sbc",
  "upstream_simulator": "https://github.com/tscircuit/return-current-simulation",
  "upstream_commit": "3f093725e16514652197eccfb22906c4f61a45ba"
}