{
 "format": "construct-scene",
 "version": 2,
 "id": "arecibo-telescope",
 "title": "Arecibo — the 305 m spherical reflector",
 "subject": {
  "category": "architecture",
  "summary": "The Arecibo Observatory radio telescope: a 305 m spherical aluminium reflector laid in a karst sinkhole, a 900-ton instrument platform hung 150 m above it on 18 cables from three reinforced-concrete towers, with its rotating bow-shaped azimuth arm and Gregorian dome. Overall dimensions come from published parameters; the truss detail, equipment, terrain and signal cone are a reconstruction made for display.",
  "accuracy": "documented",
  "synthetic": false
 },
 "units": "m",
 "seed": 1963,
 "sources": [
  {
   "id": "request",
   "kind": "user_request",
   "title": "The user's request",
   "rights": "user_private",
   "ref": "The Arecibo Observatory radio telescope: the 305 m spherical dish in a karst sinkhole, three reinforced-concrete support towers, the cables, and the 900-ton suspended platform with its azimuth arm and Gregorian dome."
  },
  {
   "id": "wiki",
   "kind": "document",
   "title": "Arecibo Telescope — Wikipedia",
   "rights": "reference_only",
   "ref": "https://en.wikipedia.org/wiki/Arecibo_Telescope — dimensions, cable count, tower heights, platform mass, azimuth arm, Gregorian upgrade, panels."
  },
  {
   "id": "naic",
   "kind": "measurement",
   "title": "Some parameters of the old Arecibo telescope platform and dish (NAIC/NRAO note)",
   "rights": "reference_only",
   "ref": "https://naic.nrao.edu/arecibo/phil/hardware/arecibo2.0/doc/Arecibo%202.0%20-%20fixed%20spherical%20primary,%20active%20secondary,%20Rx%20at%20vertex.pdf — dish depth 50 m, radius of curvature 265 m, 213 m illuminated surface, 15 m ground screen, 22 m Gregorian secondary, tower heights 111/80/80 m."
  },
  {
   "id": "ref-photos",
   "kind": "reference_image",
   "title": "Wikimedia Commons photographs of the telescope (viewed locally, not embedded)",
   "rights": "reference_only",
   "ref": "Aerial site view, platform close-ups, tower, catwalk, dish interior; used to read the platform truss, dome, cable fan and tower crowns."
  },
  {
   "id": "design",
   "kind": "generated",
   "title": "Scene author's reconstruction and staging",
   "rights": "synthetic",
   "ref": "Declarative geometry, truss detail, terrain simplification, assembly staging, survey grid and signal cone. No external artwork or photograph is embedded."
  }
 ],
 "facts": [
  {
   "key": "dish.diameter",
   "value": 305,
   "unit": "m",
   "certainty": "verified",
   "source": "wiki",
   "note": "305 m (1000 ft) spherical reflector."
  },
  {
   "key": "dish.radius",
   "value": 265,
   "unit": "m",
   "certainty": "verified",
   "source": "wiki",
   "note": "Radius of curvature of the spherical cap."
  },
  {
   "key": "dish.depth",
   "value": 50,
   "unit": "m",
   "certainty": "verified",
   "source": "naic",
   "note": "Vertex-to-rim depth of the reflector."
  },
  {
   "key": "illuminated.diameter",
   "value": 213,
   "unit": "m",
   "certainty": "verified",
   "source": "naic",
   "note": "Diameter of the illuminated surface at L-band."
  },
  {
   "key": "panels.count",
   "value": 38778,
   "unit": "panels",
   "certainty": "verified",
   "source": "wiki",
   "note": "Perforated aluminium panels, about 1 x 2 m each."
  },
  {
   "key": "platform.height",
   "value": 150,
   "unit": "m",
   "certainty": "verified",
   "source": "wiki",
   "note": "Platform suspended 150 m above the dish."
  },
  {
   "key": "platform.weight",
   "value": 900,
   "unit": "short tons",
   "certainty": "verified",
   "source": "wiki",
   "note": "Platform mass after the Gregorian upgrade (820 t)."
  },
  {
   "key": "cables.count",
   "value": 18,
   "unit": "main cables",
   "certainty": "verified",
   "source": "wiki",
   "note": "Eighteen main cables, six per tower, 8 cm bundles."
  },
  {
   "key": "tower.heights",
   "value": "111 m, 81 m, 81 m",
   "certainty": "verified",
   "source": "wiki",
   "note": "One 111 m and two 81 m reinforced-concrete towers; tops at the same elevation."
  },
  {
   "key": "arm.length",
   "value": 93,
   "unit": "m",
   "certainty": "verified",
   "source": "wiki",
   "note": "Rotating bow-shaped azimuth arm track."
  },
  {
   "key": "dome.diameter",
   "value": 22,
   "unit": "m",
   "certainty": "verified",
   "source": "naic",
   "note": "Gregorian secondary reflector, installed 1997."
  },
  {
   "key": "screen.height",
   "value": 15,
   "unit": "m",
   "certainty": "verified",
   "source": "naic",
   "note": "Perimeter ground screen around the reflector."
  },
  {
   "key": "site.karst",
   "value": "A karst sinkhole in the northern Puerto Rico hills",
   "certainty": "verified",
   "source": "wiki",
   "note": "Built into a natural sinkhole; the hills ring is a display simplification."
  },
  {
   "key": "reconstruction.design",
   "value": "Platform truss, tower crowns, backstay anchors, equipment, survey grid and signal cone",
   "certainty": "inferred",
   "source": "design",
   "note": "Designed from the references for legibility; not a survey of the structure."
  },
  {
   "key": "corners.plan",
   "value": "Triangular platform, 52 m sides, corners at 30 m radius; arms 93 m",
   "certainty": "inferred",
   "source": "design",
   "note": "Derived from the photographs' proportions, not from a published plan."
  },
  {
   "key": "scene.caption",
   "value": "ARECIBO / 305 m SPHERICAL REFLECTOR",
   "certainty": "user_supplied",
   "source": "request"
  },
  {
   "key": "scale.caption",
   "value": "DISH 305 m / PLATFORM 150 m ABOVE / TOWERS 111 + 81 m",
   "certainty": "verified",
   "source": "wiki"
  },
  {
   "key": "reconstruction.caption",
   "value": "DOCUMENTED DIMENSIONS / RECONSTRUCTED DETAIL",
   "certainty": "inferred",
   "source": "design"
  }
 ],
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   "basis": [
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   "look": {
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    "alpha": 0.4,
    "glow": 0.02
   },
   "note": "Sinkhole lip drawn as a plateau ring: a display simplification of the Mogote karst terrain."
  },
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   "id": "karst-hill-01",
   "role": "ground",
   "certainty": "inferred",
   "stage": 0,
   "shape": {
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   "shape": {
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   "shape": {
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   "certainty": "inferred",
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   "shape": {
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  },
  {
   "id": "survey-grid",
   "role": "ground",
   "certainty": "decorative",
   "stage": 0,
   "shape": {
    "type": "grid",
    "size": [
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    "divisions": 9
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   "look": {
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   "note": "Site-survey grid: presentation only, laid on the sinkhole floor."
  },
  {
   "id": "survey-ring",
   "role": "ground",
   "certainty": "decorative",
   "stage": 0,
   "shape": {
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    "rings": 0
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   "look": {
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   "note": "Setting-out ring at the reflector's 305 m diameter."
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   "role": "identity",
   "certainty": "inferred",
   "stage": 0,
   "shape": {
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    "rings": 4
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   "basis": [
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   "look": {
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    "alpha": 0.9,
    "glow": 0.4
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  },
  {
   "id": "ground-screen",
   "role": "structure",
   "certainty": "inferred",
   "stage": 0,
   "shape": {
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    "radius": 153.4,
    "height": 15,
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    "ribs": 48,
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    "caps": false
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   "look": {
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    "glow": 0.2
   },
   "note": "Wire-mesh ground screen: 15 m high around the rim (display mesh coarser)."
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   "shape": {
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   "shape": {
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   "note": "Service road (drawn in plan, not surveyed)."
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   "shape": {
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     [
      7.45,
      0.1
     ],
     [
      14.91,
      0.42
     ],
     [
      22.36,
      0.95
     ],
     [
      29.82,
      1.68
     ],
     [
      37.27,
      2.63
     ],
     [
      44.73,
      3.8
     ],
     [
      52.18,
      5.19
     ],
     [
      59.64,
      6.8
     ],
     [
      67.09,
      8.63
     ],
     [
      74.55,
      10.7
     ],
     [
      82.0,
      13.01
     ]
    ],
    "segments": 96,
    "meridians": 48
   },
   "at": [
    0,
    0,
    0
   ],
   "label": "305 m spherical reflector",
   "basis": [
    "dish.diameter",
    "dish.radius"
   ],
   "look": {
    "fill": "dark",
    "weight": 0.5,
    "alpha": 0.68,
    "glow": 0.14
   },
   "note": "Spherical cap sampled from the published 265 m radius of curvature; the inner third of the bowl, panelled at display density.",
   "source": "naic"
  },
  {
   "id": "reflector-outer",
   "role": "identity",
   "certainty": "verified",
   "stage": 1,
   "shape": {
    "type": "lathe",
    "profile": [
     [
      80.0,
      12.36
     ],
     [
      86.59,
      14.55
     ],
     [
      93.18,
      16.92
     ],
     [
      99.77,
      19.5
     ],
     [
      106.36,
      22.28
     ],
     [
      112.95,
      25.28
     ],
     [
      119.55,
      28.5
     ],
     [
      126.14,
      31.95
     ],
     [
      132.73,
      35.63
     ],
     [
      139.32,
      39.58
     ],
     [
      145.91,
      43.79
     ],
     [
      152.5,
      48.28
     ]
    ],
    "segments": 96,
    "meridians": 48
   },
   "at": [
    0,
    0,
    0
   ],
   "label": "Reflector, outer panel field",
   "basis": [
    "dish.diameter",
    "dish.radius"
   ],
   "look": {
    "fill": "dark",
    "weight": 0.5,
    "alpha": 0.66,
    "glow": 0.12
   },
   "note": "Outer panel field, meridian seams interleaved with the core to read as a mesh.",
   "source": "naic",
   "rotate": [
    0,
    3.75,
    0
   ]
  },
  {
   "id": "reflector-illuminated-annulus",
   "role": "detail",
   "certainty": "inferred",
   "stage": 1,
   "shape": {
    "type": "torus",
    "major": 106.5,
    "minor": 0.22,
    "segments": 96,
    "sides": 4,
    "rings": 0
   },
   "at": [
    0,
    22.492,
    0
   ],
   "basis": [
    "dish.diameter",
    "illuminated.diameter"
   ],
   "look": {
    "weight": 0.9,
    "alpha": 0.6
   },
   "note": "Ring at the 213 m illuminated aperture (L-band)."
  },
  {
   "id": "reflector-rim-course",
   "role": "detail",
   "certainty": "inferred",
   "stage": 1,
   "shape": {
    "type": "torus",
    "major": 149.0,
    "minor": 0.22,
    "segments": 96,
    "sides": 4,
    "rings": 0
   },
   "at": [
    0,
    46.006,
    0
   ],
   "basis": [
    "dish.diameter",
    "illuminated.diameter"
   ],
   "look": {
    "weight": 0.8,
    "alpha": 0.6
   },
   "note": "Ring at the 213 m illuminated aperture (L-band)."
  },
  {
   "id": "reflector-seam-a",
   "role": "detail",
   "certainty": "inferred",
   "stage": 1,
   "shape": {
    "type": "torus",
    "major": 38.0,
    "minor": 0.22,
    "segments": 96,
    "sides": 4,
    "rings": 0
   },
   "at": [
    0,
    2.889,
    0
   ],
   "basis": [
    "dish.diameter",
    "illuminated.diameter"
   ],
   "look": {
    "weight": 0.5,
    "alpha": 0.6
   },
   "note": "Ring at the 213 m illuminated aperture (L-band)."
  },
  {
   "id": "reflector-seam-b",
   "role": "detail",
   "certainty": "inferred",
   "stage": 1,
   "shape": {
    "type": "torus",
    "major": 76.0,
    "minor": 0.22,
    "segments": 96,
    "sides": 4,
    "rings": 0
   },
   "at": [
    0,
    11.282,
    0
   ],
   "basis": [
    "dish.diameter",
    "illuminated.diameter"
   ],
   "look": {
    "weight": 0.5,
    "alpha": 0.6
   },
   "note": "Ring at the 213 m illuminated aperture (L-band)."
  },
  {
   "id": "reflector-seam-c",
   "role": "detail",
   "certainty": "inferred",
   "stage": 1,
   "shape": {
    "type": "torus",
    "major": 122.0,
    "minor": 0.22,
    "segments": 96,
    "sides": 4,
    "rings": 0
   },
   "at": [
    0,
    29.903,
    0
   ],
   "basis": [
    "dish.diameter",
    "illuminated.diameter"
   ],
   "look": {
    "weight": 0.5,
    "alpha": 0.6
   },
   "note": "Ring at the 213 m illuminated aperture (L-band)."
  },
  {
   "id": "tower-tall-plinth",
   "role": "structure",
   "certainty": "verified",
   "stage": 2,
   "shape": {
    "type": "box",
    "size": [
     13,
     8,
     13
    ],
    "ribs": 2,
    "anchor": "base"
   },
   "at": [
    125.04,
    59.0,
    178.58
   ],
   "basis": [
    "tower.heights"
   ],
   "look": {
    "fill": "dark",
    "weight": 0.6,
    "alpha": 0.6
   },
   "source": "naic"
  },
  {
   "id": "tower-tall-shaft",
   "role": "mass",
   "certainty": "verified",
   "stage": 2,
   "shape": {
    "type": "tower",
    "radius": 8.6,
    "height": 111.0,
    "sides": 4,
    "taper": 0.62,
    "roof": "flat"
   },
   "at": [
    125.04,
    67.0,
    178.58
   ],
   "label": "111 m tall tower",
   "basis": [
    "tower.heights"
   ],
   "look": {
    "fill": "dark",
    "weight": 0.72,
    "alpha": 0.82,
    "glow": 0.06
   },
   "source": "naic",
   "rotate": [
    0,
    45,
    0
   ]
  },
  {
   "id": "tower-tall-crown",
   "role": "identity",
   "certainty": "verified",
   "stage": 2,
   "shape": {
    "type": "box",
    "size": [
     10.4,
     3.2,
     10.4
    ],
    "ribs": 3,
    "anchor": "base"
   },
   "at": [
    125.04,
    178.0,
    178.58
   ],
   "basis": [
    "tower.heights"
   ],
   "look": {
    "fill": "dark",
    "weight": 1.15,
    "alpha": 0.85,
    "glow": 0.4
   },
   "source": "naic"
  },
  {
   "id": "tower-tall-head-brace",
   "role": "detail",
   "certainty": "inferred",
   "stage": 2,
   "shape": {
    "type": "tube",
    "path": [
     [
      129.64,
      178.2,
      178.58
     ],
     [
      128.44,
      180.8,
      178.58
     ]
    ],
    "radius": 0.3,
    "sides": 4,
    "samples": 2,
    "longitudinal": 2
   },
   "at": [
    0,
    0,
    0
   ],
   "basis": [
    "tower.heights"
   ],
   "look": {
    "weight": 0.7,
    "alpha": 0.7
   },
   "repeat": {
    "count": 4,
    "radial": {
     "axis": "y",
     "center": [
      125.04,
      0,
      178.58
     ],
     "span": 360
    }
   }
  },
  {
   "id": "tower-tall-lug-ring",
   "role": "detail",
   "certainty": "inferred",
   "stage": 2,
   "shape": {
    "type": "torus",
    "major": 5.0,
    "minor": 0.35,
    "segments": 16,
    "sides": 4,
    "rings": 0
   },
   "at": [
    125.04,
    181.0,
    178.58
   ],
   "basis": [
    "tower.heights"
   ],
   "look": {
    "weight": 0.9,
    "alpha": 0.8,
    "glow": 0.3
   }
  },
  {
   "id": "tower-a-plinth",
   "role": "structure",
   "certainty": "verified",
   "stage": 2,
   "shape": {
    "type": "box",
    "size": [
     13,
     8,
     13
    ],
    "ribs": 2,
    "anchor": "base"
   },
   "at": [
    76.07,
    89.0,
    -163.14
   ],
   "basis": [
    "tower.heights"
   ],
   "look": {
    "fill": "dark",
    "weight": 0.6,
    "alpha": 0.6
   },
   "source": "naic"
  },
  {
   "id": "tower-a-shaft",
   "role": "mass",
   "certainty": "verified",
   "stage": 2,
   "shape": {
    "type": "tower",
    "radius": 8.6,
    "height": 81.0,
    "sides": 4,
    "taper": 0.62,
    "roof": "flat"
   },
   "at": [
    76.07,
    97.0,
    -163.14
   ],
   "label": "81 m tower",
   "basis": [
    "tower.heights"
   ],
   "look": {
    "fill": "dark",
    "weight": 0.72,
    "alpha": 0.82,
    "glow": 0.06
   },
   "source": "naic",
   "rotate": [
    0,
    45,
    0
   ]
  },
  {
   "id": "tower-a-crown",
   "role": "identity",
   "certainty": "verified",
   "stage": 2,
   "shape": {
    "type": "box",
    "size": [
     10.4,
     3.2,
     10.4
    ],
    "ribs": 3,
    "anchor": "base"
   },
   "at": [
    76.07,
    178.0,
    -163.14
   ],
   "basis": [
    "tower.heights"
   ],
   "look": {
    "fill": "dark",
    "weight": 1.15,
    "alpha": 0.85,
    "glow": 0.4
   },
   "source": "naic"
  },
  {
   "id": "tower-a-head-brace",
   "role": "detail",
   "certainty": "inferred",
   "stage": 2,
   "shape": {
    "type": "tube",
    "path": [
     [
      80.67,
      178.2,
      -163.14
     ],
     [
      79.47,
      180.8,
      -163.14
     ]
    ],
    "radius": 0.3,
    "sides": 4,
    "samples": 2,
    "longitudinal": 2
   },
   "at": [
    0,
    0,
    0
   ],
   "basis": [
    "tower.heights"
   ],
   "look": {
    "weight": 0.7,
    "alpha": 0.7
   },
   "repeat": {
    "count": 4,
    "radial": {
     "axis": "y",
     "center": [
      76.07,
      0,
      -163.14
     ],
     "span": 360
    }
   }
  },
  {
   "id": "tower-a-lug-ring",
   "role": "detail",
   "certainty": "inferred",
   "stage": 2,
   "shape": {
    "type": "torus",
    "major": 5.0,
    "minor": 0.35,
    "segments": 16,
    "sides": 4,
    "rings": 0
   },
   "at": [
    76.07,
    181.0,
    -163.14
   ],
   "basis": [
    "tower.heights"
   ],
   "look": {
    "weight": 0.9,
    "alpha": 0.8,
    "glow": 0.3
   }
  },
  {
   "id": "tower-b-plinth",
   "role": "structure",
   "certainty": "verified",
   "stage": 2,
   "shape": {
    "type": "box",
    "size": [
     13,
     8,
     13
    ],
    "ribs": 2,
    "anchor": "base"
   },
   "at": [
    -179.32,
    89.0,
    15.69
   ],
   "basis": [
    "tower.heights"
   ],
   "look": {
    "fill": "dark",
    "weight": 0.6,
    "alpha": 0.6
   },
   "source": "naic"
  },
  {
   "id": "tower-b-shaft",
   "role": "mass",
   "certainty": "verified",
   "stage": 2,
   "shape": {
    "type": "tower",
    "radius": 8.6,
    "height": 81.0,
    "sides": 4,
    "taper": 0.62,
    "roof": "flat"
   },
   "at": [
    -179.32,
    97.0,
    15.69
   ],
   "label": "81 m tower",
   "basis": [
    "tower.heights"
   ],
   "look": {
    "fill": "dark",
    "weight": 0.72,
    "alpha": 0.82,
    "glow": 0.06
   },
   "source": "naic",
   "rotate": [
    0,
    45,
    0
   ]
  },
  {
   "id": "tower-b-crown",
   "role": "identity",
   "certainty": "verified",
   "stage": 2,
   "shape": {
    "type": "box",
    "size": [
     10.4,
     3.2,
     10.4
    ],
    "ribs": 3,
    "anchor": "base"
   },
   "at": [
    -179.32,
    178.0,
    15.69
   ],
   "basis": [
    "tower.heights"
   ],
   "look": {
    "fill": "dark",
    "weight": 1.15,
    "alpha": 0.85,
    "glow": 0.4
   },
   "source": "naic"
  },
  {
   "id": "tower-b-head-brace",
   "role": "detail",
   "certainty": "inferred",
   "stage": 2,
   "shape": {
    "type": "tube",
    "path": [
     [
      -174.72,
      178.2,
      15.69
     ],
     [
      -175.92,
      180.8,
      15.69
     ]
    ],
    "radius": 0.3,
    "sides": 4,
    "samples": 2,
    "longitudinal": 2
   },
   "at": [
    0,
    0,
    0
   ],
   "basis": [
    "tower.heights"
   ],
   "look": {
    "weight": 0.7,
    "alpha": 0.7
   },
   "repeat": {
    "count": 4,
    "radial": {
     "axis": "y",
     "center": [
      -179.32,
      0,
      15.69
     ],
     "span": 360
    }
   }
  },
  {
   "id": "tower-b-lug-ring",
   "role": "detail",
   "certainty": "inferred",
   "stage": 2,
   "shape": {
    "type": "torus",
    "major": 5.0,
    "minor": 0.35,
    "segments": 16,
    "sides": 4,
    "rings": 0
   },
   "at": [
    -179.32,
    181.0,
    15.69
   ],
   "basis": [
    "tower.heights"
   ],
   "look": {
    "weight": 0.9,
    "alpha": 0.8,
    "glow": 0.3
   }
  },
  {
   "id": "main-cable-01",
   "role": "detail",
   "certainty": "inferred",
   "stage": 3,
   "shape": {
    "type": "tube",
    "path": [
     [
      125.04,
      181.0,
      178.58
     ],
     [
      71.59,
      169.0,
      101.25
     ],
     [
      34.18,
      162.62,
      47.11
     ],
     [
      18.15,
      160.2,
      23.91
     ]
    ],
    "radius": 0.42,
    "sides": 5,
    "samples": 6,
    "longitudinal": 3,
    "ring_every": 4
   },
   "at": [
    0,
    0,
    0
   ],
   "basis": [
    "cables.count",
    "tower.heights"
   ],
   "look": {
    "weight": 0.9,
    "alpha": 0.8,
    "glow": 0.12
   },
   "note": "One of the 18 main cables: six per tower, taut into the platform corner posts."
  },
  {
   "id": "main-cable-02",
   "role": "detail",
   "certainty": "inferred",
   "stage": 3,
   "shape": {
    "type": "tube",
    "path": [
     [
      125.04,
      181.0,
      178.58
     ],
     [
      71.12,
      168.92000000000002,
      101.57
     ],
     [
      33.38,
      162.49,
      47.67
     ],
     [
      17.21,
      160.05,
      24.57
     ]
    ],
    "radius": 0.42,
    "sides": 5,
    "samples": 6,
    "longitudinal": 3,
    "ring_every": 4
   },
   "at": [
    0,
    0,
    0
   ],
   "basis": [
    "cables.count",
    "tower.heights"
   ],
   "look": {
    "weight": 0.9,
    "alpha": 0.8,
    "glow": 0.12
   },
   "note": "One of the 18 main cables: six per tower, taut into the platform corner posts."
  },
  {
   "id": "main-cable-03",
   "role": "detail",
   "certainty": "inferred",
   "stage": 3,
   "shape": {
    "type": "tube",
    "path": [
     [
      125.04,
      181.0,
      178.58
     ],
     [
      70.65,
      168.85,
      101.9
     ],
     [
      32.58,
      162.36,
      48.24
     ],
     [
      16.27,
      159.9,
      25.23
     ]
    ],
    "radius": 0.42,
    "sides": 5,
    "samples": 6,
    "longitudinal": 3,
    "ring_every": 4
   },
   "at": [
    0,
    0,
    0
   ],
   "basis": [
    "cables.count",
    "tower.heights"
   ],
   "look": {
    "weight": 0.9,
    "alpha": 0.8,
    "glow": 0.12
   },
   "note": "One of the 18 main cables: six per tower, taut into the platform corner posts."
  },
  {
   "id": "main-cable-04",
   "role": "detail",
   "certainty": "inferred",
   "stage": 3,
   "shape": {
    "type": "tube",
    "path": [
     [
      125.04,
      181.0,
      178.58
     ],
     [
      68.34,
      169.0,
      75.45
     ],
     [
      28.65,
      162.62,
      3.26
     ],
     [
      11.64,
      160.2,
      -27.68
     ]
    ],
    "radius": 0.42,
    "sides": 5,
    "samples": 6,
    "longitudinal": 3,
    "ring_every": 4
   },
   "at": [
    0,
    0,
    0
   ],
   "basis": [
    "cables.count",
    "tower.heights"
   ],
   "look": {
    "weight": 0.9,
    "alpha": 0.8,
    "glow": 0.12
   },
   "note": "One of the 18 main cables: six per tower, taut into the platform corner posts."
  },
  {
   "id": "main-cable-05",
   "role": "detail",
   "certainty": "inferred",
   "stage": 3,
   "shape": {
    "type": "tube",
    "path": [
     [
      125.04,
      181.0,
      178.58
     ],
     [
      68.86,
      168.92000000000002,
      75.69
     ],
     [
      29.53,
      162.49,
      3.68
     ],
     [
      12.68,
      160.05,
      -27.19
     ]
    ],
    "radius": 0.42,
    "sides": 5,
    "samples": 6,
    "longitudinal": 3,
    "ring_every": 4
   },
   "at": [
    0,
    0,
    0
   ],
   "basis": [
    "cables.count",
    "tower.heights"
   ],
   "look": {
    "weight": 0.9,
    "alpha": 0.8,
    "glow": 0.12
   },
   "note": "One of the 18 main cables: six per tower, taut into the platform corner posts."
  },
  {
   "id": "main-cable-06",
   "role": "detail",
   "certainty": "inferred",
   "stage": 3,
   "shape": {
    "type": "tube",
    "path": [
     [
      125.04,
      181.0,
      178.58
     ],
     [
      69.38,
      168.85,
      75.94
     ],
     [
      30.42,
      162.36,
      4.09
     ],
     [
      13.72,
      159.9,
      -26.7
     ]
    ],
    "radius": 0.42,
    "sides": 5,
    "samples": 6,
    "longitudinal": 3,
    "ring_every": 4
   },
   "at": [
    0,
    0,
    0
   ],
   "basis": [
    "cables.count",
    "tower.heights"
   ],
   "look": {
    "weight": 0.9,
    "alpha": 0.8,
    "glow": 0.12
   },
   "note": "One of the 18 main cables: six per tower, taut into the platform corner posts."
  },
  {
   "id": "main-cable-07",
   "role": "detail",
   "certainty": "inferred",
   "stage": 3,
   "shape": {
    "type": "tube",
    "path": [
     [
      76.07,
      181.0,
      -163.14
     ],
     [
      43.85,
      169.0,
      -95.41
     ],
     [
      21.3,
      162.62,
      -47.99
     ],
     [
      11.64,
      160.2,
      -27.68
     ]
    ],
    "radius": 0.42,
    "sides": 5,
    "samples": 6,
    "longitudinal": 3,
    "ring_every": 4
   },
   "at": [
    0,
    0,
    0
   ],
   "basis": [
    "cables.count",
    "tower.heights"
   ],
   "look": {
    "weight": 0.9,
    "alpha": 0.8,
    "glow": 0.12
   },
   "note": "One of the 18 main cables: six per tower, taut into the platform corner posts."
  },
  {
   "id": "main-cable-08",
   "role": "detail",
   "certainty": "inferred",
   "stage": 3,
   "shape": {
    "type": "tube",
    "path": [
     [
      76.07,
      181.0,
      -163.14
     ],
     [
      44.37,
      168.92000000000002,
      -95.16
     ],
     [
      22.19,
      162.49,
      -47.58
     ],
     [
      12.68,
      160.05,
      -27.19
     ]
    ],
    "radius": 0.42,
    "sides": 5,
    "samples": 6,
    "longitudinal": 3,
    "ring_every": 4
   },
   "at": [
    0,
    0,
    0
   ],
   "basis": [
    "cables.count",
    "tower.heights"
   ],
   "look": {
    "weight": 0.9,
    "alpha": 0.8,
    "glow": 0.12
   },
   "note": "One of the 18 main cables: six per tower, taut into the platform corner posts."
  },
  {
   "id": "main-cable-09",
   "role": "detail",
   "certainty": "inferred",
   "stage": 3,
   "shape": {
    "type": "tube",
    "path": [
     [
      76.07,
      181.0,
      -163.14
     ],
     [
      44.9,
      168.85,
      -94.92
     ],
     [
      23.07,
      162.36,
      -47.17
     ],
     [
      13.72,
      159.9,
      -26.7
     ]
    ],
    "radius": 0.42,
    "sides": 5,
    "samples": 6,
    "longitudinal": 3,
    "ring_every": 4
   },
   "at": [
    0,
    0,
    0
   ],
   "basis": [
    "cables.count",
    "tower.heights"
   ],
   "look": {
    "weight": 0.9,
    "alpha": 0.8,
    "glow": 0.12
   },
   "note": "One of the 18 main cables: six per tower, taut into the platform corner posts."
  },
  {
   "id": "main-cable-10",
   "role": "detail",
   "certainty": "inferred",
   "stage": 3,
   "shape": {
    "type": "tube",
    "path": [
     [
      76.07,
      181.0,
      -163.14
     ],
     [
      23.14,
      169.0,
      -79.69
     ],
     [
      -13.91,
      162.62,
      -21.27
     ],
     [
      -29.79,
      160.2,
      3.76
     ]
    ],
    "radius": 0.42,
    "sides": 5,
    "samples": 6,
    "longitudinal": 3,
    "ring_every": 4
   },
   "at": [
    0,
    0,
    0
   ],
   "basis": [
    "cables.count",
    "tower.heights"
   ],
   "look": {
    "weight": 0.9,
    "alpha": 0.8,
    "glow": 0.12
   },
   "note": "One of the 18 main cables: six per tower, taut into the platform corner posts."
  },
  {
   "id": "main-cable-11",
   "role": "detail",
   "certainty": "inferred",
   "stage": 3,
   "shape": {
    "type": "tube",
    "path": [
     [
      76.07,
      181.0,
      -163.14
     ],
     [
      23.09,
      168.92000000000002,
      -80.26
     ],
     [
      -13.99,
      162.49,
      -22.25
     ],
     [
      -29.89,
      160.05,
      2.61
     ]
    ],
    "radius": 0.42,
    "sides": 5,
    "samples": 6,
    "longitudinal": 3,
    "ring_every": 4
   },
   "at": [
    0,
    0,
    0
   ],
   "basis": [
    "cables.count",
    "tower.heights"
   ],
   "look": {
    "weight": 0.9,
    "alpha": 0.8,
    "glow": 0.12
   },
   "note": "One of the 18 main cables: six per tower, taut into the platform corner posts."
  },
  {
   "id": "main-cable-12",
   "role": "detail",
   "certainty": "inferred",
   "stage": 3,
   "shape": {
    "type": "tube",
    "path": [
     [
      76.07,
      181.0,
      -163.14
     ],
     [
      23.04,
      168.85,
      -80.83
     ],
     [
      -14.08,
      162.36,
      -23.22
     ],
     [
      -29.99,
      159.9,
      1.47
     ]
    ],
    "radius": 0.42,
    "sides": 5,
    "samples": 6,
    "longitudinal": 3,
    "ring_every": 4
   },
   "at": [
    0,
    0,
    0
   ],
   "basis": [
    "cables.count",
    "tower.heights"
   ],
   "look": {
    "weight": 0.9,
    "alpha": 0.8,
    "glow": 0.12
   },
   "note": "One of the 18 main cables: six per tower, taut into the platform corner posts."
  },
  {
   "id": "main-cable-13",
   "role": "detail",
   "certainty": "inferred",
   "stage": 3,
   "shape": {
    "type": "tube",
    "path": [
     [
      -179.32,
      181.0,
      15.69
     ],
     [
      -104.55,
      169.0,
      9.72
     ],
     [
      -52.22,
      162.62,
      5.55
     ],
     [
      -29.79,
      160.2,
      3.76
     ]
    ],
    "radius": 0.42,
    "sides": 5,
    "samples": 6,
    "longitudinal": 3,
    "ring_every": 4
   },
   "at": [
    0,
    0,
    0
   ],
   "basis": [
    "cables.count",
    "tower.heights"
   ],
   "look": {
    "weight": 0.9,
    "alpha": 0.8,
    "glow": 0.12
   },
   "note": "One of the 18 main cables: six per tower, taut into the platform corner posts."
  },
  {
   "id": "main-cable-14",
   "role": "detail",
   "certainty": "inferred",
   "stage": 3,
   "shape": {
    "type": "tube",
    "path": [
     [
      -179.32,
      181.0,
      15.69
     ],
     [
      -104.6,
      168.92000000000002,
      9.15
     ],
     [
      -52.3,
      162.49,
      4.58
     ],
     [
      -29.89,
      160.05,
      2.61
     ]
    ],
    "radius": 0.42,
    "sides": 5,
    "samples": 6,
    "longitudinal": 3,
    "ring_every": 4
   },
   "at": [
    0,
    0,
    0
   ],
   "basis": [
    "cables.count",
    "tower.heights"
   ],
   "look": {
    "weight": 0.9,
    "alpha": 0.8,
    "glow": 0.12
   },
   "note": "One of the 18 main cables: six per tower, taut into the platform corner posts."
  },
  {
   "id": "main-cable-15",
   "role": "detail",
   "certainty": "inferred",
   "stage": 3,
   "shape": {
    "type": "tube",
    "path": [
     [
      -179.32,
      181.0,
      15.69
     ],
     [
      -104.65,
      168.85,
      8.58
     ],
     [
      -52.39,
      162.36,
      3.6
     ],
     [
      -29.99,
      159.9,
      1.47
     ]
    ],
    "radius": 0.42,
    "sides": 5,
    "samples": 6,
    "longitudinal": 3,
    "ring_every": 4
   },
   "at": [
    0,
    0,
    0
   ],
   "basis": [
    "cables.count",
    "tower.heights"
   ],
   "look": {
    "weight": 0.9,
    "alpha": 0.8,
    "glow": 0.12
   },
   "note": "One of the 18 main cables: six per tower, taut into the platform corner posts."
  },
  {
   "id": "main-cable-16",
   "role": "detail",
   "certainty": "inferred",
   "stage": 3,
   "shape": {
    "type": "tube",
    "path": [
     [
      -179.32,
      181.0,
      15.69
     ],
     [
      -83.84,
      169.0,
      -5.99
     ],
     [
      -17.01,
      162.62,
      -21.17
     ],
     [
      11.64,
      160.2,
      -27.68
     ]
    ],
    "radius": 0.42,
    "sides": 5,
    "samples": 6,
    "longitudinal": 3,
    "ring_every": 4
   },
   "at": [
    0,
    0,
    0
   ],
   "basis": [
    "cables.count",
    "tower.heights"
   ],
   "look": {
    "weight": 0.9,
    "alpha": 0.8,
    "glow": 0.12
   },
   "note": "One of the 18 main cables: six per tower, taut into the platform corner posts."
  },
  {
   "id": "main-cable-17",
   "role": "detail",
   "certainty": "inferred",
   "stage": 3,
   "shape": {
    "type": "tube",
    "path": [
     [
      -179.32,
      181.0,
      15.69
     ],
     [
      -83.32,
      168.92000000000002,
      -5.75
     ],
     [
      -16.12,
      162.49,
      -20.76
     ],
     [
      12.68,
      160.05,
      -27.19
     ]
    ],
    "radius": 0.42,
    "sides": 5,
    "samples": 6,
    "longitudinal": 3,
    "ring_every": 4
   },
   "at": [
    0,
    0,
    0
   ],
   "basis": [
    "cables.count",
    "tower.heights"
   ],
   "look": {
    "weight": 0.9,
    "alpha": 0.8,
    "glow": 0.12
   },
   "note": "One of the 18 main cables: six per tower, taut into the platform corner posts."
  },
  {
   "id": "main-cable-18",
   "role": "detail",
   "certainty": "inferred",
   "stage": 3,
   "shape": {
    "type": "tube",
    "path": [
     [
      -179.32,
      181.0,
      15.69
     ],
     [
      -82.8,
      168.85,
      -5.51
     ],
     [
      -15.23,
      162.36,
      -20.34
     ],
     [
      13.72,
      159.9,
      -26.7
     ]
    ],
    "radius": 0.42,
    "sides": 5,
    "samples": 6,
    "longitudinal": 3,
    "ring_every": 4
   },
   "at": [
    0,
    0,
    0
   ],
   "basis": [
    "cables.count",
    "tower.heights"
   ],
   "look": {
    "weight": 0.9,
    "alpha": 0.8,
    "glow": 0.12
   },
   "note": "One of the 18 main cables: six per tower, taut into the platform corner posts."
  },
  {
   "id": "backstay-01",
   "role": "detail",
   "certainty": "inferred",
   "stage": 3,
   "shape": {
    "type": "tube",
    "path": [
     [
      125.04,
      181.0,
      178.58
     ],
     [
      104.25,
      92.5,
      203.93
     ],
     [
      83.45,
      4.0,
      229.28
     ]
    ],
    "radius": 0.34,
    "sides": 5,
    "samples": 6,
    "longitudinal": 3,
    "ring_every": 4
   },
   "at": [
    0,
    0,
    0
   ],
   "basis": [
    "cables.count"
   ],
   "look": {
    "weight": 0.7,
    "alpha": 0.65
   },
   "note": "Backstay to a rock anchor; the count and anchors are inferred."
  },
  {
   "id": "backstay-02",
   "role": "detail",
   "certainty": "inferred",
   "stage": 3,
   "shape": {
    "type": "tube",
    "path": [
     [
      125.04,
      181.0,
      178.58
     ],
     [
      135.36,
      92.5,
      193.32
     ],
     [
      145.69,
      4.0,
      208.06
     ]
    ],
    "radius": 0.34,
    "sides": 5,
    "samples": 6,
    "longitudinal": 3,
    "ring_every": 4
   },
   "at": [
    0,
    0,
    0
   ],
   "basis": [
    "cables.count"
   ],
   "look": {
    "weight": 0.7,
    "alpha": 0.65
   },
   "note": "Backstay to a rock anchor; the count and anchors are inferred."
  },
  {
   "id": "backstay-03",
   "role": "detail",
   "certainty": "inferred",
   "stage": 3,
   "shape": {
    "type": "tube",
    "path": [
     [
      125.04,
      181.0,
      178.58
     ],
     [
      163.64,
      92.5,
      174.14
     ],
     [
      202.24,
      4.0,
      169.7
     ]
    ],
    "radius": 0.34,
    "sides": 5,
    "samples": 6,
    "longitudinal": 3,
    "ring_every": 4
   },
   "at": [
    0,
    0,
    0
   ],
   "basis": [
    "cables.count"
   ],
   "look": {
    "weight": 0.7,
    "alpha": 0.65
   },
   "note": "Backstay to a rock anchor; the count and anchors are inferred."
  },
  {
   "id": "backstay-04",
   "role": "detail",
   "certainty": "inferred",
   "stage": 3,
   "shape": {
    "type": "tube",
    "path": [
     [
      76.07,
      181.0,
      -163.14
     ],
     [
      104.24,
      92.5,
      -160.47
     ],
     [
      132.41,
      4.0,
      -157.81
     ]
    ],
    "radius": 0.34,
    "sides": 5,
    "samples": 6,
    "longitudinal": 3,
    "ring_every": 4
   },
   "at": [
    0,
    0,
    0
   ],
   "basis": [
    "cables.count"
   ],
   "look": {
    "weight": 0.7,
    "alpha": 0.65
   },
   "note": "Backstay to a rock anchor; the count and anchors are inferred."
  },
  {
   "id": "backstay-05",
   "role": "detail",
   "certainty": "inferred",
   "stage": 3,
   "shape": {
    "type": "tube",
    "path": [
     [
      76.07,
      181.0,
      -163.14
     ],
     [
      83.68,
      92.5,
      -179.45
     ],
     [
      91.29,
      4.0,
      -195.76
     ]
    ],
    "radius": 0.34,
    "sides": 5,
    "samples": 6,
    "longitudinal": 3,
    "ring_every": 4
   },
   "at": [
    0,
    0,
    0
   ],
   "basis": [
    "cables.count"
   ],
   "look": {
    "weight": 0.7,
    "alpha": 0.65
   },
   "note": "Backstay to a rock anchor; the count and anchors are inferred."
  },
  {
   "id": "backstay-06",
   "role": "detail",
   "certainty": "inferred",
   "stage": 3,
   "shape": {
    "type": "tube",
    "path": [
     [
      76.07,
      181.0,
      -163.14
     ],
     [
      57.66,
      92.5,
      -192.85
     ],
     [
      39.24,
      4.0,
      -222.57
     ]
    ],
    "radius": 0.34,
    "sides": 5,
    "samples": 6,
    "longitudinal": 3,
    "ring_every": 4
   },
   "at": [
    0,
    0,
    0
   ],
   "basis": [
    "cables.count"
   ],
   "look": {
    "weight": 0.7,
    "alpha": 0.65
   },
   "note": "Backstay to a rock anchor; the count and anchors are inferred."
  },
  {
   "id": "backstay-07",
   "role": "detail",
   "certainty": "inferred",
   "stage": 3,
   "shape": {
    "type": "tube",
    "path": [
     [
      -179.32,
      181.0,
      15.69
     ],
     [
      -191.09,
      92.5,
      -10.04
     ],
     [
      -202.87,
      4.0,
      -35.77
     ]
    ],
    "radius": 0.34,
    "sides": 5,
    "samples": 6,
    "longitudinal": 3,
    "ring_every": 4
   },
   "at": [
    0,
    0,
    0
   ],
   "basis": [
    "cables.count"
   ],
   "look": {
    "weight": 0.7,
    "alpha": 0.65
   },
   "note": "Backstay to a rock anchor; the count and anchors are inferred."
  },
  {
   "id": "backstay-08",
   "role": "detail",
   "certainty": "inferred",
   "stage": 3,
   "shape": {
    "type": "tube",
    "path": [
     [
      -179.32,
      181.0,
      15.69
     ],
     [
      -197.25,
      92.5,
      17.26
     ],
     [
      -215.18,
      4.0,
      18.83
     ]
    ],
    "radius": 0.34,
    "sides": 5,
    "samples": 6,
    "longitudinal": 3,
    "ring_every": 4
   },
   "at": [
    0,
    0,
    0
   ],
   "basis": [
    "cables.count"
   ],
   "look": {
    "weight": 0.7,
    "alpha": 0.65
   },
   "note": "Backstay to a rock anchor; the count and anchors are inferred."
  },
  {
   "id": "backstay-09",
   "role": "detail",
   "certainty": "inferred",
   "stage": 3,
   "shape": {
    "type": "tube",
    "path": [
     [
      -179.32,
      181.0,
      15.69
     ],
     [
      -195.84,
      92.5,
      46.49
     ],
     [
      -212.37,
      4.0,
      77.3
     ]
    ],
    "radius": 0.34,
    "sides": 5,
    "samples": 6,
    "longitudinal": 3,
    "ring_every": 4
   },
   "at": [
    0,
    0,
    0
   ],
   "basis": [
    "cables.count"
   ],
   "look": {
    "weight": 0.7,
    "alpha": 0.65
   },
   "note": "Backstay to a rock anchor; the count and anchors are inferred."
  },
  {
   "id": "tie-down-1",
   "role": "detail",
   "certainty": "inferred",
   "stage": 3,
   "shape": {
    "type": "tube",
    "path": [
     [
      16.52,
      143.0,
      23.59
     ],
     [
      12.62,
      70,
      18.02
     ],
     [
      25.24,
      4.08,
      36.04
     ]
    ],
    "radius": 0.3,
    "sides": 4,
    "samples": 5,
    "longitudinal": 3
   },
   "at": [
    0,
    0,
    0
   ],
   "basis": [
    "platform.height"
   ],
   "look": {
    "weight": 0.6,
    "alpha": 0.6
   },
   "note": "Platform tie-down to a winch on the reflector (three pairs in reality)."
  },
  {
   "id": "tie-down-2",
   "role": "detail",
   "certainty": "inferred",
   "stage": 3,
   "shape": {
    "type": "tube",
    "path": [
     [
      12.17,
      143.0,
      -26.1
     ],
     [
      9.3,
      70,
      -19.94
     ],
     [
      18.6,
      4.08,
      -39.88
     ]
    ],
    "radius": 0.3,
    "sides": 4,
    "samples": 5,
    "longitudinal": 3
   },
   "at": [
    0,
    0,
    0
   ],
   "basis": [
    "platform.height"
   ],
   "look": {
    "weight": 0.6,
    "alpha": 0.6
   },
   "note": "Platform tie-down to a winch on the reflector (three pairs in reality)."
  },
  {
   "id": "tie-down-3",
   "role": "detail",
   "certainty": "inferred",
   "stage": 3,
   "shape": {
    "type": "tube",
    "path": [
     [
      -28.69,
      143.0,
      2.51
     ],
     [
      -21.92,
      70,
      1.92
     ],
     [
      -43.83,
      4.08,
      3.83
     ]
    ],
    "radius": 0.3,
    "sides": 4,
    "samples": 5,
    "longitudinal": 3
   },
   "at": [
    0,
    0,
    0
   ],
   "basis": [
    "platform.height"
   ],
   "look": {
    "weight": 0.6,
    "alpha": 0.6
   },
   "note": "Platform tie-down to a winch on the reflector (three pairs in reality)."
  },
  {
   "id": "cableway",
   "role": "detail",
   "certainty": "inferred",
   "stage": 3,
   "shape": {
    "type": "tube",
    "path": [
     [
      52.67,
      51.28,
      144.71
     ],
     [
      35.27,
      101.14,
      91.29
     ],
     [
      14.0,
      142.0,
      26.0
     ]
    ],
    "radius": 0.24,
    "sides": 4,
    "samples": 6,
    "longitudinal": 3
   },
   "at": [
    0,
    0,
    0
   ],
   "basis": [
    "platform.height"
   ],
   "look": {
    "weight": 0.6,
    "alpha": 0.55
   },
   "note": "Cable-car line to the platform (the gondola itself arrives at stage 6)."
  },
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  {
   "id": "tower-a-sockets",
   "role": "detail",
   "certainty": "inferred",
   "stage": 2,
   "basis": [
    "tower.heights"
   ],
   "shape": {
    "type": "box",
    "size": [
     1.3,
     1.1,
     1.3
    ],
    "ribs": 2,
    "anchor": "base"
   },
   "at": [
    80.27,
    181.8,
    -163.14
   ],
   "repeat": {
    "count": 6,
    "radial": {
     "axis": "y",
     "center": [
      76.07,
      0,
      -163.14
     ],
     "span": 360
    }
   },
   "look": {
    "fill": "dark",
    "weight": 0.7,
    "alpha": 0.75,
    "glow": 0.25
   }
  },
  {
   "id": "tower-b-sockets",
   "role": "detail",
   "certainty": "inferred",
   "stage": 2,
   "basis": [
    "tower.heights"
   ],
   "shape": {
    "type": "box",
    "size": [
     1.3,
     1.1,
     1.3
    ],
    "ribs": 2,
    "anchor": "base"
   },
   "at": [
    -175.12,
    181.8,
    15.69
   ],
   "repeat": {
    "count": 6,
    "radial": {
     "axis": "y",
     "center": [
      -179.32,
      0,
      15.69
     ],
     "span": 360
    }
   },
   "look": {
    "fill": "dark",
    "weight": 0.7,
    "alpha": 0.75,
    "glow": 0.25
   }
  }
 ],
 "annotations": [
  {
   "id": "dish-note",
   "part": "reflector-core",
   "text": "305 m spherical reflector (265 m radius)",
   "offset": [
    -70,
    26,
    60
   ],
   "certainty": "verified"
  },
  {
   "id": "tower-note",
   "part": "tower-tall-crown",
   "text": "Three concrete towers, tops level",
   "offset": [
    6,
    4,
    0
   ],
   "certainty": "verified"
  },
  {
   "id": "cable-note",
   "part": "main-cable-01",
   "text": "18 main cables (6 per tower)",
   "offset": [
    0,
    6,
    0
   ],
   "certainty": "verified"
  },
  {
   "id": "platform-note",
   "part": "platform-corner-1",
   "text": "900-ton suspended platform",
   "offset": [
    4,
    6,
    0
   ],
   "certainty": "verified"
  },
  {
   "id": "dome-note",
   "part": "gregorian-dome",
   "text": "22 m Gregorian dome (1997)",
   "offset": [
    10,
    10,
    0
   ],
   "certainty": "verified"
  },
  {
   "id": "arm-note",
   "part": "azimuth-arm-top",
   "text": "93 m azimuth arm (drive extent inferred)",
   "offset": [
    -30,
    8,
    0
   ],
   "certainty": "inferred"
  },
  {
   "id": "cone-note",
   "part": "signal-cone",
   "text": "Receive path drawn faint (decorative)",
   "offset": [
    16,
    2,
    0
   ],
   "certainty": "decorative"
  }
 ],
 "presentation": {
  "framing": {
   "yaw": 88,
   "pitch": 15,
   "fit": 0.8
  },
  "views": [
   {
    "id": "dish",
    "label": "The 305 m bowl",
    "yaw": 100,
    "pitch": 30,
    "distance": 1.3,
    "target": "rim-ring"
   },
   {
    "id": "towers",
    "label": "Concrete towers and the cable fan",
    "yaw": 88,
    "pitch": 12,
    "distance": 1.5,
    "target": "tower-tall-shaft"
   },
   {
    "id": "platform",
    "label": "Suspended platform",
    "yaw": 42,
    "pitch": 24,
    "distance": 2.1,
    "target": "platform-deck-plate"
   },
   {
    "id": "dome",
    "label": "Azimuth arm and Gregorian dome",
    "yaw": 70,
    "pitch": 8,
    "distance": 3.4,
    "target": "gregorian-dome"
   },
   {
    "id": "plan",
    "label": "Plan: tripod, bowl and arm",
    "yaw": 0,
    "pitch": 80,
    "distance": 1.0
   }
  ],
  "atmosphere": {
   "haze": 0.7,
   "scanlines": true,
   "vignette": true,
   "grid": false,
   "projector": false,
   "motes": 0.28
  },
  "occlusion": "xray",
  "certainty_style": "subtle",
  "background": "deep",
  "float": 0
 },
 "animation": {
  "assembly": {
   "style": "build",
   "seconds": 20,
   "interference": false
  },
  "idle": {
   "life": "calm",
   "events": [
    "shimmer",
    "scan",
    "propagate"
   ],
   "cadence": [
    12,
    24
   ],
   "strength": 0.3
  },
  "camera": {
   "drift": 2.0,
   "breathe": 0.018,
   "tour": [
    {
     "view": "dish",
     "at": 5,
     "fly": 4.5
    },
    {
     "view": "towers",
     "at": 12,
     "fly": 4.5
    },
    {
     "view": "platform",
     "at": 19,
     "fly": 4.5
    },
    {
     "view": "dome",
     "at": 30,
     "fly": 5
    },
    {
     "view": "plan",
     "at": 46,
     "fly": 5.5
    },
    {
     "view": "hero",
     "at": 64,
     "fly": 6
    }
   ]
  },
  "reduced_motion": "still"
 },
 "authoring": {
  "tier": "masterpiece",
  "research": "done",
  "sources": [
   "wiki",
   "naic",
   "ref-photos"
  ],
  "review_rounds": 4,
  "outcome": "self-reviewed",
  "identity": [
   {
    "feature": "305 m spherical reflector laid in the karst sinkhole, with its mesh rim screen",
    "parts": [
     "reflector-core",
     "reflector-outer",
     "rim-ring",
     "ground-screen"
    ]
   },
   {
    "feature": "Three reinforced-concrete towers, one 111 m and two 81 m, tops at one level",
    "parts": [
     "tower-tall-shaft",
     "tower-tall-crown",
     "tower-a-shaft",
     "tower-b-shaft"
    ]
   },
   {
    "feature": "18 taut main cables into the triangular 900-ton platform",
    "parts": [
     "main-cable-01",
     "platform-post-1",
     "platform-top-chord-1"
    ]
   },
   {
    "feature": "Bow-shaped 93 m azimuth arm, 22 m Gregorian dome and counterweight",
    "parts": [
     "azimuth-arm-top",
     "gregorian-dome",
     "counterweight"
    ]
   }
  ],
  "next": [
   "the renderer caps a lathe at 48 meridians, so the 38,778-panel surface is drawn at 1/8 of its real density",
   "a true geodesic (triangular) dome shell needs a triangle primitive; the helical net only approximates the facets",
   "the staged build is capped at 20 s by the scene schema; for the 87-second film the build phase has to be stretched by the host (see arecibo-87s.json)"
  ],
  "critic": {
   "scene_sha256": "6fc9d16ab853ee5e27b9fd59450be9b5b65f717d21b57fd4d862e3b747fd7956",
   "verdict": "improve",
   "scores": {
    "silhouette": 2,
    "proportions": 2,
    "identity": 2,
    "depth": 2,
    "composition": 2,
    "assembly": 2,
    "motion": 2,
    "density": 1,
    "honesty": 2
   },
   "round": 1,
   "defects": 12
  },
  "rounds": [
   {
    "round": 1,
    "result": "baseline",
    "minutes": 0.2,
    "changes": [],
    "summary": "The 305 m bowl, which is most of the subject's area, is a bare net: the reflector lathe has 13 profile points and 24 meridians (~12 m spacin"
   },
   {
    "round": 2,
    "result": "kept",
    "minutes": 3.3,
    "changes": [
     "D1",
     "D2",
     "D4",
     "D5"
    ],
    "summary": "The site is not a sinkhole. Around the rim there is one smooth scalloped skirt and a ring of ten identical hollow hexagonal drums with flat "
   },
   {
    "round": 3,
    "result": "reverted",
    "minutes": 1.8,
    "changes": [
     "D11",
     "D13",
     "D3"
    ],
    "summary": "the suspension reads as a cable bridge. Each tower crown sends 3-4 strands into one shallow catenary that runs on over the top of the deck t"
   },
   {
    "round": 4,
    "result": "reverted",
    "minutes": 2.1,
    "changes": [
     "D1",
     "D11",
     "D4",
     "D7"
    ],
    "summary": "The Gregorian dome is an open wire cage: about 14 meridians, 5 parallels, one bright equatorial belt and a 5.4 m open bottom ring, with the "
   }
  ]
 }
}