{
  "schema_version": 1,
  "description": "一次資料から採録した公表集計。独自の生ショット実測ではない。nullは非公表。百分率の単位はpercent、差はpercentage points。",
  "arccos_driver_3w": {
    "source":"S07", "kind":"published_observation", "period":null,"cell_shots":null,"sex_mix":null,
    "reference":"fairway centreline, not declared aim; carry/stop details and OB handling not fully documented",
    "rows":[
      {"cohort":"all","club":"Driver","median_yards":226,"fw_percent":45.5,"within30_percent":78.0,"within40_percent":89.3,"chart":"S07a"},
      {"cohort":"all","club":"3W","median_yards":214,"fw_percent":46.4,"within30_percent":81.2,"within40_percent":91.6,"chart":"S07a"},
      {"cohort":"HC0","club":"Driver","median_yards":245,"fw_percent":47.3,"within30_percent":78.8,"within40_percent":89.8,"chart":"S07b"},
      {"cohort":"HC0","club":"3W","median_yards":230,"fw_percent":49.7,"within30_percent":82.8,"within40_percent":92.4,"chart":"S07b"},
      {"cohort":"HC20","club":"Driver","median_yards":205,"fw_percent":42.7,"within30_percent":77.4,"within40_percent":88.9,"chart":"S07c"},
      {"cohort":"HC20","club":"3W","median_yards":195,"fw_percent":41.9,"within30_percent":79.9,"within40_percent":90.7,"chart":"S07c"}
    ]
  },
  "shot_scope_clubs": {
    "source":"S05", "locator":"PDF p7, printed p12", "kind":"published_observation", "distance_definition":"P-AVG; outliers excluded", "period":null,"cell_shots":null,
    "hcp":[0,5,10,15,20,25],
    "driver_yards":[285,259,256,238,225,204],"driver_fw_percent":[46,49,50,48,46,50],
    "threewood_yards":[260,232,225,215,193,176],"threewood_fw_percent":[50,51,54,47,48,59]
  },
  "shot_scope_approach": {
    "source":"S05", "locator":"PDF p8, printed p14", "kind":"published_observation", "distance_band_yards":[130,150],"lie":"all","cell_shots":null,"period":null,
    "hcp":[0,5,10,15,20,25],"green_hit_percent":[61.7,44.5,38.6,28.2,20.2,16.8],"strokes_to_finish":[3.13,3.34,3.52,3.78,3.94,4.16]
  },
  "shot_scope_lies": {
    "source":"S06", "locator":"PDF and printed p10", "kind":"published_observation", "distance_band_yards":[60,100],"cell_shots":null,"period":null,
    "hcp":[8,14,20],"fairway_green_percent":[64,61,54],"rough_green_percent":[58,51,42],"bunker_green_percent":[42,35,29],
    "bunker_definition":"source says BUNKER only, not a verified fairway/greenside bunker split"
  },
  "golfmetrics_2009": {
    "source":"S02", "locator":"Table 2, printed p3118, PDF p10", "kind":"published_observation", "cell_shots":null,
    "rows":[
      {"cohort":"80-golfer","score_band":[78,82],"distance75_yards":250.1,"angle_sd_degrees":5.5,"fw_percent":53.7,"penalty_percent":1.8,"recovery_percent":11.6,"se":[1.8,0.2,1.4,0.3,0.9]},
      {"cohort":"100-golfer","score_band":[96,107],"distance75_yards":225.0,"angle_sd_degrees":7.9,"fw_percent":43.9,"penalty_percent":7.8,"recovery_percent":22.5,"se":[3.1,0.6,2.1,1.6,2.4]}
    ]
  },
  "golfmetrics_simulation": {
    "source":"S02","locator":"Table 3, printed p3119, PDF p11","kind":"author_simulation","unit":"strokes per 18 holes",
    "rows":[
      {"course":"typical","cohort":"100","plus20yd":-1.2,"minus2deg_sd":-2.6},
      {"course":"typical","cohort":"80","plus20yd":-0.5,"minus2deg_sd":-2.1},
      {"course":"no_trees","cohort":"100","plus20yd":-2.0,"minus2deg_sd":-1.7},
      {"course":"no_trees","cohort":"80","plus20yd":-0.9,"minus2deg_sd":-1.4},
      {"course":"rough_only","cohort":"100","plus20yd":-1.7,"minus2deg_sd":-0.5},
      {"course":"rough_only","cohort":"80","plus20yd":-1.3,"minus2deg_sd":-0.6}
    ]
  },
  "pga_residual_benchmark": {
    "source":"S03", "locator":"Table B.1, printed p164, PDF p19", "kind":"author_fitted_benchmark","period":"2003-2010", "cell_shots":null,
    "distance_yards":[100,120,140,160,180,200],"fairway":[2.80,2.85,2.91,2.98,3.08,3.19],"rough":[3.02,3.08,3.15,3.23,3.31,3.42],"sand":[3.23,3.21,3.22,3.28,3.40,3.55],"recovery":[3.80,3.78,3.80,3.81,3.82,3.87]
  },
  "distance_models": {
    "source":"S04", "kind":"author_regression", "game_golf":{"locator":"pp33-36, section 8B; coefficients p35 VIII", "period":"2013-2016, majority 2014","shots":161476,"beta_strokes_per_yard_per_hole":0.0070,"fairway_premium_strokes":0.21,"fw_comparator":"all missed fairways, not ordinary rough"},
    "pga":{"locator":"pp12-13, section 6A and Table 5","period":"2004-2018","beta_strokes_per_yard_per_hole":0.0049,"loss_vs_fairway":{"semi_rough":0.08,"primary_rough":0.28,"fairway_bunker":0.33,"other":0.63,"hazard":1.03}}
  },
  "arccos_2026": {"source":"S08","kind":"provider_report_announcement","period":"2025","rounds_description":"more than 5 million","driver_shots_description":"nearly 10 million","low_hcp_band":"Scratch to 4.9","low_in_play_percent":88,"hcp30plus_penalty_or_recovery_percent":45.1,"cell_shots":null},
  "arccos_residual": {"source":"S09","kind":"published_observation","hcp":10,"distance_yards":100,"fw":3.38,"rough":3.50,"cell_shots":null},
  "arccos_equal_green_hit": {"source":"S10","kind":"published_observation","hcp":5,"fairway_yards":148,"rough_yards":119,"green_hit_percent":50,"cell_shots":null}
}