{ "X3D": { "encoding":"UTF-8", "@profile":"Immersive", "@version":"3.0", "@xsd:noNamespaceSchemaLocation":"https://www.web3d.org/specifications/x3d-3.0.xsd", "JSON schema":"https://www.web3d.org/specifications/x3d-4.0-JSONSchema.autogenerated.json", "head": { "meta": [ { "@name":"title", "@content":"SatellitePairPrototype.x3d" }, { "@name":"description", "@content":"A Pair of TRC-170s. A TRC-170 is a long-range SHF communication system. It operates in 3 modes. 1)Direct point-to-point link (< 30 miles). 2) Tropospheric shot (up to 100 or 150 miles, depending on system version). 3) Defraction shot over an a terrain feature or object in the path ( < 50 miles)." }, { "@name":"creator", "@content":"Mike Hunsberger" }, { "@name":"created", "@content":"8 May 2001" }, { "@name":"modified", "@content":"20 October 2019" }, { "@name":"identifier", "@content":"https://www.web3d.org/x3d/content/examples/Savage/CommunicationsAndSensors/Satellite/SatellitePairPrototype.x3d" }, { "@name":"generator", "@content":"X3D-Edit 3.2, https://www.web3d.org/x3d/tools/X3D-Edit" }, { "@name":"license", "@content":"../../license.html" }, { "@name":"translated", "@content":"21 April 2026" }, { "@name":"generator", "@content":"X3dToJson.xslt, https://www.web3d.org/x3d/stylesheets/X3dToJson.html" }, { "@name":"reference", "@content":"X3D JSON encoding: https://www.web3d.org/wiki/index.php/X3D_JSON_Encoding" } ] }, "Scene": { "-children":[ { "#comment":"ExternProtoDeclare definitions must be included verbatim" }, { "ExternProtoDeclare": { "@name":"BeamCone", "@appinfo":"Produce wireframe or transparent beam cones. Typical uses include propeller/thruster water flow or line-of-sight sonar/radar/light beams. Negative range values invert base and apex at same relative location. Default: beam with apex at (0 0 0) and base of radius 1 in x-z plane at (1 0 0).", "@url":["../../CommunicationsAndSensors/Beam/BeamConePrototype.x3d#BeamCone","https://www.web3d.org/x3d/content/examples/Savage/CommunicationsAndSensors/Beam/BeamConePrototype.x3d#BeamCone","../../CommunicationsAndSensors/Beam/BeamConePrototype.wrl#BeamCone","https://www.web3d.org/x3d/content/examples/Savage/CommunicationsAndSensors/Beam/BeamConePrototype.wrl#BeamCone"], "field": [ { "@name":"contact", "@accessType":"inputOnly", "@appinfo":"(communications) is transmitted signal in contact with receiver or (sensor) is a target return detected?", "@type":"SFBool" }, { "@name":"range", "@accessType":"inputOnly", "@appinfo":"distance in meters along x axis", "@type":"SFFloat" }, { "@name":"defaultRange", "@accessType":"initializeOnly", "@appinfo":"distance in meters used until eventIn range sent", "@type":"SFFloat" }, { "@name":"wireframe", "@accessType":"initializeOnly", "@appinfo":"whether wireframe beam is drawn", "@type":"SFBool" }, { "@name":"solid", "@accessType":"initializeOnly", "@appinfo":"whether solid beam is drawn", "@type":"SFBool" }, { "@name":"beamHeightDegrees", "@accessType":"initializeOnly", "@appinfo":"degrees across vertical y axis", "@type":"SFFloat" }, { "@name":"beamWidthDegrees", "@accessType":"initializeOnly", "@appinfo":"degrees across horizontal z axis", "@type":"SFFloat" }, { "@name":"contactColor", "@accessType":"initializeOnly", "@appinfo":"rendering color when contact=true", "@type":"SFColor" }, { "@name":"noContactColor", "@accessType":"initializeOnly", "@appinfo":"rendering color when contact=false", "@type":"SFColor" }, { "@name":"transparency", "@accessType":"inputOutput", "@appinfo":"1 = fully transparent wireframe only", "@type":"SFFloat" }, { "@name":"name", "@accessType":"initializeOnly", "@appinfo":"BeamCone name aids in node identification and tracing", "@type":"SFString" }, { "@name":"traceEnabled", "@accessType":"initializeOnly", "@appinfo":"flag to turn on Script tracing", "@type":"SFBool" } ] } }, { "ProtoDeclare": { "@name":"SatellitePair", "@appinfo":"SatellitePair consists of two TRC170 dishes for long range (up to 100 mile) point-to-point communication. TRC170s can be used in 3 different settings. The first is a direct link of up to 30 miles. The second is a defraction setting over an obstruction in the path. The third is a tropospheric scatter shot of up to 100 miles in which the signal is bounced off the troposphere. This PROTO allows specification for the initial placement of each TSSR. It automatically calculates the correct angle to complete the link.", "ProtoInterface": { "field": [ { "@name":"GroundLocation", "@accessType":"initializeOnly", "@type":"SFVec3f", "@value":[1,1,1] }, { "@name":"SatelliteLocation", "@accessType":"initializeOnly", "@type":"SFVec3f", "@value":[0,0,0] } ] }, "ProtoBody": { "-children":[ { "Group": { "-children":[ { "Transform": { "@DEF":"HighAboveXZTranslation" } }, { "Viewpoint": { "@DEF":"GroundViewpoint", "@description":"Ground Station" } }, { "Viewpoint": { "@DEF":"SatelliteViewpoint", "@description":"Satellite" } }, { "Script": { "@DEF":"TransmitScript", "field": [ { "@name":"transState", "@accessType":"inputOnly", "@type":"SFInt32" }, { "@name":"size", "@accessType":"outputOnly", "@type":"SFVec3f" } ], "#sourceCode":[ "", "", "ecmascript:", "", "function initialize ()", "{", "\tsize = new SFVec3f(100, 100, 100) ;", "\tBrowser.println ('TransmitScript initialize() complete') ;", "}", "", "// function name matches eventIn variable name ('hour')", "// hourValue captures the new value of the ROUTE hour event", "// minutes is just the current field value", "", "function transState (newValue, timestamp)", "{", "\ttransmitState = newValue ;", "\tif (transmitState == 3) {", "\t\tsize = new SFVec3f(10, 10, 10) ;", "\t}", "\telse {", "\t\tsize = new SFVec3f(100, 100, 100) ;", "\t}", "\tBrowser.println ('size\t= ' + size) ;", "}", "", "" ] } }, { "Script": { "@DEF":"TransmitScript2", "field": [ { "@name":"transState", "@accessType":"inputOnly", "@type":"SFInt32" }, { "@name":"size", "@accessType":"outputOnly", "@type":"SFVec3f" } ], "#sourceCode":[ "", "", "ecmascript:", "", "function initialize ()", "{", "\tsize = new SFVec3f(100, 100, 100) ;", "\tBrowser.println ('TransmitScript initialize() complete') ;", "}", "", "// function name matches eventIn variable name ('hour')", "// hourValue captures the new value of the ROUTE hour event", "// minutes is just the current field value", "", "function transState (newValue, timestamp)", "{", "\ttransmitState = newValue ;", "\tif (transmitState == 3) {", "\t\tsize = new SFVec3f(10, 10, 10) ;", "\t}", "\telse {", "\t\tsize = new SFVec3f(100, 100, 100) ;", "\t}", "\tBrowser.println ('size\t= ' + size) ;", "}", "", "" ] } }, { "LOD": { "@range":[200000], "-children":[ { "#comment":"TRC 1 Two Transforms. One in the XZ plane, the second in the XY plane. Inlines for the TRC body, stand, and the dome pattern." }, { "Transform": { "@DEF":"GROUND_TRANSFORM", "@translation":[-2,0,0], "IS": { "connect": [ { "@nodeField":"translation", "@protoField":"GroundLocation" } ] }, "-children":[ { "Transform": { "@DEF":"Ground_XY_TRANSFORM", "@translation":[1,5,0], "-children":[ { "Inline": { "@DEF":"GroundBody", "@url":["SatelliteDish.x3d","../../CommunicationsAndSensors/Satellite/SatelliteDish.x3d","https://www.web3d.org/x3d/content/examples/Savage/CommunicationsAndSensors/Satellite/SatelliteDish.x3d","../../CommunicationsAndSensors/Satellite/SatelliteDish.wrl","SatelliteDish.wrl","https://www.web3d.org/x3d/content/examples/Savage/CommunicationsAndSensors/Satellite/SatelliteDish.wrl"] } }, { "Transform": { "@DEF":"GroundCone", "@translation":[2,0,0], "-children":[ { "Group": { "-children":[ { "ProtoInstance": { "@name":"BeamCone", "@DEF":"GROUND_BEAMCONE", "fieldValue": [ { "@name":"defaultRange", "@value":10 }, { "@name":"beamHeightDegrees", "@value":5 }, { "@name":"beamWidthDegrees", "@value":5 }, { "@name":"transparency", "@value":0.2 }, { "@name":"wireframe", "@value":true }, { "@name":"solid", "@value":true }, { "@name":"noContactColor", "@value":[0.8,0.1,0.1] }, { "@name":"contactColor", "@value":[0.3,0.5,0.5] } ] } } ] } } ] } } ] } }, { "Transform": { "-children":[ { "Inline": { "@DEF":"GroundStand", "@url":["SatelliteTripod.x3d","../../CommunicationsAndSensors/Satellite/SatelliteTripod.x3d","https://www.web3d.org/x3d/content/examples/Savage/CommunicationsAndSensors/Satellite/SatelliteTripod.x3d","../../CommunicationsAndSensors/Satellite/SatelliteTripod.wrl","SatelliteTripod.wrl","https://www.web3d.org/x3d/content/examples/Savage/CommunicationsAndSensors/Satellite/SatelliteTripod.wrl"] } }, { "LOD": { "@range":[500], "-children":[ { "Transform": { "-children":[ { "Viewpoint": { "@description":"Ground Station Side View", "@position":[0,5,40] } } ] } }, { "WorldInfo": { "@info":["null node for no rendering when distant"] } } ] } } ] } } ] } }, { "WorldInfo": { "@info":["null node for no rendering when distant"] } } ] } }, { "LOD": { "@range":[200000], "-children":[ { "#comment":"TRC 2 Two Transforms. One in the XZ plane, the second in the XY plane. Inlines for the TRC body, stand, and the dome pattern." }, { "Transform": { "@DEF":"Satellite_TRANSFORM", "@translation":[-2,0,0], "IS": { "connect": [ { "@nodeField":"translation", "@protoField":"SatelliteLocation" } ] }, "-children":[ { "Transform": { "@scale":[5,5,5], "-children":[ { "Inline": { "@url":["SatelliteBody.x3d","../../CommunicationsAndSensors/Satellite/SatelliteBody.x3d","https://www.web3d.org/x3d/content/examples/Savage/CommunicationsAndSensors/Satellite/SatelliteBody.x3d","../../CommunicationsAndSensors/Satellite/SatelliteBody.wrl","SatelliteBody.wrl","https://www.web3d.org/x3d/content/examples/Savage/CommunicationsAndSensors/Satellite/SatelliteBody.wrl"] } } ] } }, { "Transform": { "@DEF":"Satellite_XY_TRANSFORM", "@translation":[1,5,0], "-children":[ { "Transform": { "@DEF":"SatelliteCone", "@translation":[0,-10,0], "-children":[ { "Group": { "-children":[ { "ProtoInstance": { "@name":"BeamCone", "@DEF":"Satellite_BEAMCONE", "fieldValue": [ { "@name":"defaultRange", "@value":10 }, { "@name":"beamHeightDegrees", "@value":60 }, { "@name":"beamWidthDegrees", "@value":60 }, { "@name":"transparency", "@value":0.2 }, { "@name":"wireframe", "@value":true }, { "@name":"solid", "@value":true }, { "@name":"noContactColor", "@value":[0.8,0.1,0.1] }, { "@name":"contactColor", "@value":[0.3,0.5,0.5] } ] } } ] } } ] } } ] } }, { "Transform": { "-children":[ { "LOD": { "@range":[500], "-children":[ { "Viewpoint": { "@description":"Satellite Side View", "@position":[0,5,40] } }, { "WorldInfo": { "@info":["null node"] } } ] } } ] } } ] } }, { "WorldInfo": { "@info":["null node"] } } ] } }, { "Script": { "@DEF":"CalculateAngleScript", "field": [ { "@name":"GroundLocation", "@accessType":"initializeOnly", "@type":"SFVec3f" }, { "@name":"SatelliteLocation", "@accessType":"initializeOnly", "@type":"SFVec3f" }, { "@name":"Ground_XZangle", "@accessType":"outputOnly", "@type":"SFRotation" }, { "@name":"Satellite_XZangle", "@accessType":"outputOnly", "@type":"SFRotation" }, { "@name":"beamScale", "@accessType":"outputOnly", "@type":"SFVec3f" }, { "@name":"Ground_beamLength", "@accessType":"outputOnly", "@type":"SFFloat" }, { "@name":"Satellite_beamLength", "@accessType":"outputOnly", "@type":"SFFloat" }, { "@name":"Ground_XYangle", "@accessType":"outputOnly", "@type":"SFRotation" }, { "@name":"Satellite_XYangle", "@accessType":"outputOnly", "@type":"SFRotation" }, { "@name":"LinkEstablished", "@accessType":"outputOnly", "@type":"SFBool" }, { "@name":"Ground_Viewpoint", "@accessType":"outputOnly", "@type":"SFVec3f" }, { "@name":"Satellite_Viewpoint", "@accessType":"outputOnly", "@type":"SFVec3f" }, { "@name":"Ground_ViewpointAngle", "@accessType":"outputOnly", "@type":"SFRotation" }, { "@name":"Satellite_ViewpointAngle", "@accessType":"outputOnly", "@type":"SFRotation" } ], "IS": { "connect": [ { "@nodeField":"GroundLocation", "@protoField":"GroundLocation" }, { "@nodeField":"SatelliteLocation", "@protoField":"SatelliteLocation" } ] }, "#sourceCode":[ "", "", "ecmascript:", "", "function initialize ()", "{", "\tBrowser.println ('GroundStation\t=' + GroundLocation) ;", "\tBrowser.println ('Satellite\t\t=' + SatelliteLocation) ;", "\tBrowser.println ('TransmitScript initialize() complete') ;", "\tactive = true ;", "\tGround_XZangle\t= new SFRotation(0, 1, 0, 0) ;", "\tSatellite_XZangle\t= new SFRotation(0, 1, 0, 0) ;", "\tGround_XYangle\t= new SFRotation(0, 0, 1, 0) ;", "\tSatellite_XYangle\t= new SFRotation(0, 0, 1, 0) ;", "\tXZangle\t= new SFRotation(0, 1, 0, 0) ;", "\tXYangle\t= new SFRotation(0, 0, 1, 0) ;", "\tGround_ViewpointAngle\t= new SFRotation(0, 1, 0, 0) ;", "\tSatellite_ViewpointAngle\t= new SFRotation(1, 0, 0, 0) ;", "\tHighAboveViewpointAngle\t= new SFRotation(1, 0, 0, 0) ;\t", "\tHighAboveTranslationAngle\t= new SFRotation(0, 1, 0, 0) ;", "", "\tbeamScale\t\t= new SFVec3f ( ) ;", "\tcenter\t\t= new SFVec3f ( ) ;", "\tGround_Viewpoint\t= new SFVec3f ( ) ;", "\tSatellite_Viewpoint\t= new SFVec3f ( ) ;", "\tHighAboveViewpoint\t= new SFVec3f ( ) ;", "\tLinkEstablished\t= true;", "\t\t", "\tcompute(active) ;", "}", "", "", "function compute ( )", "{", "\t\tcomputeDistance( ) ;", "\t\tcomputeXZangle( );", "\t\tcomputeXYangle( ) ;", "", "\tGround_Viewpoint[0]\t= GroundLocation[0] + Math.sin(Ground_XZangle[3] - 1.57)*40;", "\tGround_Viewpoint[1]\t= GroundLocation[1] + 10;", "\tGround_Viewpoint[2]\t= GroundLocation[2] +Math.cos(Ground_XZangle[3] - 1.57)*40;", "print ('Ground_Viewpoint\t'+ Ground_Viewpoint) ;", "\tGround_ViewpointAngle[3]\t= Ground_XZangle[3] - 1.57 ;", "", "\tSatellite_Viewpoint[0]\t= SatelliteLocation[0] ;", "\tSatellite_Viewpoint[1]\t= SatelliteLocation[1] + 200;", "\tSatellite_Viewpoint[2]\t= SatelliteLocation[2] ;", "\tSatellite_ViewpointAngle[3]\t= -1.57 ;", "print ('Satellite_Viewpoint\t'+ Satellite_Viewpoint) ;", "\t", "}", "", "", "", "function computeDistance( ) ", "{", "\tBrowser.println ('Ground\t=' + GroundLocation) ;", "\tBrowser.println ('Satellite\t=' + SatelliteLocation) ;", "\tdeltaX \t= (SatelliteLocation[0] - GroundLocation[0]) ;", "\tdeltaY \t= (SatelliteLocation[1] - GroundLocation[1]) ;", "\tdeltaZ \t= (SatelliteLocation[2] - GroundLocation[2]) ;", "\tdistanceSquared\t= deltaX * deltaX + deltaY * deltaY + deltaZ * deltaZ ;", "\tBrowser.println ('Distance Squared\t=' + distanceSquared) ;", "\tdistance \t= Math.sqrt(distanceSquared) ;", "\tBrowser.println ('Distance\t=' + distance) ;", "", "\tbeamScale[0] \t= distance/10;", "\tbeamScale[1]\t= 10;", "\tbeamScale[2]\t= 10;\t", "\tBrowser.println ('BeamScale\t=' + beamScale) ;", "\tGround_beamLength \t= distance -2;\t", "\tSatellite_beamLength \t= 2000;", "\tif (distance > 60000/.6*1000) {", "\t\tLinkEstablished = false;", "\t\tGround_beamLength = 5000/.6 ;\t", "\t\tSatellite_beamLength = 5000/.6 ;", "\t}", "}", "", "function computeXZangle( ) ", "{", "\tif (deltaZ == 0) {", "\t\tdeltaZ = .00000001 ;", "\t}", "\t", "\tangle \t= Math.atan(deltaX/deltaZ) ;", "\tif (deltaZ < 0) {", "\t\tGround_XZangle[3] = angle + Math.PI/2;", "\t}", "\telse {", "\t\tGround_XZangle[3] = angle - Math.PI/2;", "\t}", "\tSatellite_XZangle[3] = 1.57;", "\t", "\tBrowser.println ('Angle\t=' + Ground_XZangle[3]) ;", "\tBrowser.println ('Angle2\t=' + Satellite_XZangle[3]) ;", "}\t", "\t\t", "", "", "function computeXYangle( ) ", "{", "\tangle \t= Math.asin(deltaY/distance) ;", "\tGround_XYangle[3] = angle ;", "\tSatellite_XYangle[3] = -1.57;", "\t", "\tBrowser.println ('AngleXY\t=' + Ground_XYangle[3]) ;", "\tBrowser.println ('Angle2XY\t=' + Satellite_XYangle[3]) ;", "}", "", "" ] } } ] } }, { "ROUTE": { "@fromField":"Ground_XZangle", "@fromNode":"CalculateAngleScript", "@toField":"rotation", "@toNode":"GROUND_TRANSFORM" } }, { "ROUTE": { "@fromField":"Satellite_XZangle", "@fromNode":"CalculateAngleScript", "@toField":"rotation", "@toNode":"Satellite_TRANSFORM" } }, { "ROUTE": { "@fromField":"Ground_beamLength", "@fromNode":"CalculateAngleScript", "@toField":"range", "@toNode":"GROUND_BEAMCONE" } }, { "ROUTE": { "@fromField":"Ground_XYangle", "@fromNode":"CalculateAngleScript", "@toField":"rotation", "@toNode":"Ground_XY_TRANSFORM" } }, { "ROUTE": { "@fromField":"Satellite_XYangle", "@fromNode":"CalculateAngleScript", "@toField":"rotation", "@toNode":"Satellite_XY_TRANSFORM" } }, { "ROUTE": { "@fromField":"LinkEstablished", "@fromNode":"CalculateAngleScript", "@toField":"contact", "@toNode":"GROUND_BEAMCONE" } }, { "ROUTE": { "@fromField":"LinkEstablished", "@fromNode":"CalculateAngleScript", "@toField":"contact", "@toNode":"Satellite_BEAMCONE" } }, { "ROUTE": { "@fromField":"Ground_Viewpoint", "@fromNode":"CalculateAngleScript", "@toField":"position", "@toNode":"GroundViewpoint" } }, { "ROUTE": { "@fromField":"Satellite_Viewpoint", "@fromNode":"CalculateAngleScript", "@toField":"position", "@toNode":"SatelliteViewpoint" } }, { "ROUTE": { "@fromField":"Ground_ViewpointAngle", "@fromNode":"CalculateAngleScript", "@toField":"orientation", "@toNode":"GroundViewpoint" } }, { "ROUTE": { "@fromField":"Satellite_ViewpointAngle", "@fromNode":"CalculateAngleScript", "@toField":"orientation", "@toNode":"SatelliteViewpoint" } } ] } } }, { "#comment":"====================" }, { "WorldInfo": { "@info":["Authors: Mike Hunsberger","Revised: 30 April 2001","Purpose: Pair of TSSRs","Browser: CosmoPlayer"], "@title":"AntennaWorld" } }, { "Background": { "@groundAngle":[1.57079], "@groundColor":[1,0.8,0.6,0.6,0.4,0.2], "@skyAngle":[0.2], "@skyColor":[1,1,1,0.2,0.2,1] } }, { "ProtoInstance": { "@name":"SatellitePair", "fieldValue": [ { "@name":"GroundLocation", "@value":[0,0,0] }, { "@name":"SatelliteLocation", "@value":[-1020000,42000000,-22000000] } ] } } ] } } }