Table 6.22 — EAs with labels beginning with R
Label Concept definition Figure(s) Attribute value type EQ label Code
RADAR_BEACON_FREQUENCY The specific <<FREQUENCY>> of a radar transponder <BEACON>.   REAL FREQUENCY 1042
RADAR_CROSS_SECTION The ratio of the radar power (or flux) per unit solid angle reflected from an <OBJECT> toward a <SENSOR> and 4π times the incident power density; radar cross section.   REAL AREA 1043
RADAR_REFLECTOR_ANGLE The <<GEODETIC_AZIMUTH>> of the radar reflective side of an <OBJECT>; radar reflector angle.   REAL PLANE_ANGLE 1044
RADAR_REFLECTOR_PRESENT An indication that an <OBJECT> has an associated radar reflector <DEVICE>; radar reflector present.   BOOLEAN   1045
RADAR_SIGNIFICANCE_FACTOR The type of an <OBJECT> based on the predominant exposed <MATERIAL> of the <SURFACE> of the <OBJECT>; radar significance factor.   ENUMERATION   1046
RADAR_STATION_TYPE The type of a <RADAR_STATION>.   ENUMERATION   1047
RADAR_TERRAIN_CLUTTER The radar surface clutter expressed in mean <<RADAR_CROSS_SECTION>> per unit <<AREA>> of <TERRAIN>.   REAL PURE_NUMBER 1048
RADAR_TRANSPONDER_TYPE The type of a radar transponder <BEACON>.   ENUMERATION   1049
RADAR_WATERBODY_SURFACE-
_CLUTTER
The radar surface clutter expressed in mean <<RADAR_CROSS_SECTION>> per unit <<AREA>> of <WATERBODY_SURFACE>.   REAL PURE_NUMBER 1050
RADIANCE The radiant power per unit source <<AREA>> per unit solid angle; radiance.   REAL RADIANCE 1051
RADIANCE_FLUCTUATION_24_HOUR The amount of fluctuation (peak amplitude) of the<<RADIANCE>> (or luminance) of a <SURFACE> over a twenty-four hour <<TIME_QUANTITY>>, expressed as a value from 0 to 255.   REAL PURE_NUMBER 1052
RADIANCE_PHASE The angular phase of <<RADIANCE>> amplitude assuming a sine wave fluctuation.   REAL PLANE_ANGLE 1053
RADIANT_FLUX_DENSITY The radiant energy crossing a unit area from one side; radiant flux density. The same quantity is designated as either the irradiance (when it is a received flux) or the exitance (when it is an emitted flux).   REAL IRRADIANCE 1054
RADIATIVE_FLUX_DOWNWELLING Short <<WAVELENGTH>> (less than 4 microns) <<RADIANT_FLUX_DENSITY>> incident downward on a <PLANETARY_SURFACE> as direct solar radiation; radiative flux downwelling.   REAL IRRADIANCE 1055
RADIATIVE_FLUX_UPWELLING The net (upward minus downward) long <<WAVELENGTH>> (greater than 4 microns) thermal <<RADIANT_FLUX_DENSITY>> from a <PLANETARY_SURFACE>; radiative flux upwelling.   REAL IRRADIANCE 1056
RADIO_STATION_TYPE The type of a marine radio <COMMUNICATION_STATION>.   ENUMERATION   1057
RADIOLOGIC_AGENT_ATM-
_CONCENTRATION
The concentration of a radiologic agent suspended in an <ATMOSPHERE>.   REAL VOLUMIC_MASS 1058
RADIOLOGIC_AGENT_SURFACE-
_CONCENTRATION
The concentration of a radiologic agent contained in a layer on the <SURFACE> of an <OBJECT>.   REAL SURFACE_DENSITY 1059
RADIOLOGIC_AGENT_TYPE The type of a radiologic agent that can kill, seriously injure, or incapacitate <HUMAN>s or <NON_HUMAN_ANIMAL>s through its physiological properties.   ENUMERATION   1060
RADIOLOGIC_MASS The <<MASS>> of a radiologic substance contained in an <OBJECT>.   REAL MASS 1061
RADIUS The radius of an <OBJECT>.   REAL LENGTH 1062
RAILING_HEIGHT The vertical distance from the <FLOOR> to the top of a railing; railing height.   REAL LENGTH 1063
RAILING_TYPE The type of a railing.   ENUMERATION   1064
RAILWAY_GAUGE The distance between a single pair of rails of a <RAILWAY_TRACK> measured along the shortest distance from inside rail to inside rail; railway gauge.   REAL LENGTH 1065
RAILWAY_GAUGE_CATEGORY The category of a <<RAILWAY_GAUGE>>.   ENUMERATION   1066
RAILWAY_MAXIMUM_AXLE_LOAD The maximum load allowable on any single axle of a <RAIL_WAGON> or <LOCOMOTIVE_ENGINE>; railway maximum axle load.   REAL MASS 1067
RAILWAY_MAXIMUM_LOAD The maximum load allowable on a <RAILWAY>.   REAL MASS 1068
RAILWAY_POWER_SOURCE The source of electrical power for a <RAILWAY>.   ENUMERATION   1069
RAILWAY_TRACK_ARRANGEMENT The arrangement of <RAILWAY_TRACK>s in both <DIRECTION>s on a single bed.   ENUMERATION   1070
RAILWAY_TYPE The type of a <SYSTEM> of <RAILWAY>s used to support various transportation uses.   ENUMERATION   1071
RAMP_DEPLOYED_POSITION A number between 0 and 1 inclusive representing the linearly-scaled fractional deployment of a <RAMP> or <GATE> of a <MAN_MADE_OBJECT>; ramp deployed position. Zero means fully stowed/retracted/closed and one means fully deployed.   REAL PURE_NUMBER 1072
RAPID_CLASS In North America, the relative difficulty of traversing a <RAPID>, based on the Safety Code of American Whitewater; rapid class.   ENUMERATION   1073
RECEIVED_AMBIENT_LIGHT-
_SCALED_INTENSITY
A number between 0 and 1 inclusive representing the linearly-scaled fractional light intensity received by an <OBJECT> from all unlocalized sources; received ambient light scaled intensity. Zero means minimum intensity and one means maximum intensity.   REAL PURE_NUMBER 1074
RECEIVED_DIFFUSE_LIGHT-
_SCALED_INTENSITY
A number between 0 and 1 inclusive representing the linearly-scaled fractional light intensity received by an <OBJECT> from the diffuse radiation leaving a particular localized source. Zero means minimum intensity and one means maximum intensity.   REAL PURE_NUMBER 1075
RECEIVED_SPECULAR_LIGHT-
_SCALED_INTENSITY
A number between 0 and 1 inclusive representing the linearly-scaled fractional light intensity received by an <OBJECT> from the specular radiation leaving a particular localized source. Zero means minimum intensity and one means maximum intensity.   REAL PURE_NUMBER 1076
RECOMMENDED_TRACK An indication that an <OBJECT> complies with a recommended track.   BOOLEAN   1077
RECORDING_DATE The date when the given information concerning the <OBJECT> was recorded, captured, edited, or deleted; recording date. The value is formatted as specified by <<DATE_FORMAT>> or by <<DATE_TIME_FORMAT>>.   CONSTRAINED_STRING   1078
RECORDING_DATE_TYPE The type of a <<RECORDING_DATE>>.   ENUMERATION   1079
REFLECTANCE_AZIMUTH_GEODETIC The <<VECTOR_AZIMUTH_GEODETIC>> toward which light is reflected (the <DIRECTION> of the Poynting vector); reflectance azimuth geodetic.   REAL PLANE_ANGLE 1080
REFLECTANCE_AZIMUTH_LOCAL The <<VECTOR_AZIMUTH_LOCAL>> toward which light is reflected (the <DIRECTION> of the Poynting vector); reflectance azimuth local.   REAL PLANE_ANGLE 1081
REFLECTANCE_AZIMUTH_MAGNETIC The <<VECTOR_AZIMUTH_MAGNETIC>> toward which light is reflected (the <DIRECTION> of the Poynting vector); reflectance azimuth magnetic.   REAL PLANE_ANGLE 1082
REFLECTANCE_ELEV_ANGLE-
_HORIZONTAL
The <<VECTOR_ELEV_ANGLE_HORIZONTAL>> toward which light is reflected (the <DIRECTION> of the Poynting vector); reflectance elevation angle horizontal.   REAL PLANE_ANGLE 1083
REFLECTANCE_ELEV_ANGLE_LOCAL The <<VECTOR_ELEV_ANGLE_LOCAL>> toward which light is reflected (the <DIRECTION> of the unit Poynting vector); reflectance elevation angle local.   REAL PLANE_ANGLE 1084
REFLECTANCE_ZENITH_ANGLE_LOCAL The angle at a <LOCATION> on a <SURFACE> between the vectors A and B, where A is the surface normal vector and B is the <DIRECTION> toward the sampling of radiation reflected from the <SURFACE> at that <LOCATION>; reflectance zenith angle local. The positive sense is clockwise when looking in the <DIRECTION> of the cross product AxB.   REAL PLANE_ANGLE 1085
REFRACTION_INDEX_IMAGINARY-
_PART
The imaginary part of a complex refraction index. The complex refraction index is the square root of the product of the complex relative permittivity and permeability of the <MATERIAL>. The imaginary part of the complex refraction index can also be derived from the attenuation index or absorption coefficient of the <MATERIAL>.   REAL PURE_NUMBER 1086
REFRACTION_INDEX_REAL_PART The real part of a complex refraction index. The complex refraction index is the square root of the product of the complex relative permittivity and permeability of the <MATERIAL>. The real part of a complex refraction index can also be derived from the attenuation index or absorption coefficient of the <MATERIAL>.   REAL PURE_NUMBER 1087
REGIONAL_STYLE The architectural style of a <STRUCTURE> based on the <REGION> of the <EARTH> where it is commonly used or other important characteristics; regional style.   ENUMERATION   1088
REINFORCED An indication that a <STRUCTURE> is reinforced for support.   BOOLEAN   1702
RELATIVE_HORIZONTAL_ACCURACY The horizontal accuracy of a <LOCATION> relative to another horizontal <LOCATION> expressed in units of length at 90% circular error.   REAL LENGTH 1089
RELATIVE_HUMIDITY The ratio of vapour pressure to saturation vapour pressure, where vapour pressure is the pressure exerted by the molecules of water vapour and saturation vapour pressure is the pressure exerted by molecules of water vapour in <AIR> that has attained saturation; relative humidity.   REAL PURE_NUMBER 1090
RELATIVE_HUMIDITY_ERROR The error in a measurement of <<RELATIVE_HUMIDITY>> that is introduced by uncertainties.   REAL PURE_NUMBER 1091
RELATIVE_HUMIDITY_MINIMUM-
_TEMPERATURE
The <<RELATIVE_HUMIDITY>> at the time of the lowest <<AIR_TEMPERATURE>> for the preceding twenty-four hours; relative humidity minimum temperature.   REAL PURE_NUMBER 1092
RELATIVE_LOCATION The <LOCATION> of an <OBJECT> relative to the surrounding <REGION>.   ENUMERATION   1093
RELATIVE_ORIENTATION_ANGLE The angular distance about the vertical axis of an <OBJECT> measured in the local horizontal plane from the positive x-axis of an external (relative) coordinate system clockwise (viewed from above) to the major (longitudinal) axis of the <OBJECT>; relative orientation angle.   REAL PLANE_ANGLE 1094
RELATIVE_VERTICAL_ACCURACY The vertical accuracy of a <LOCATION> relative to another vertical <LOCATION>, expressed in units of length at 90% linear error.   REAL LENGTH 1095
RELEASABILITY_RESTRICTIONS The releasability restrictions of information about an <OBJECT>.   STRING   1096
RELIGIOUS_DESIGNATION A designation denoting a religion or system of belief; religious designation.   ENUMERATION   1097
RESERVOIR_TYPE The manner that a <RESERVOIR> contains <WATER>; reservoir type.   ENUMERATION   1098
REVERBERATION_NOISE_POWER-
_LEVEL
The power level of acoustic energy in a <WATERBODY> due to reflection of active acoustic emissions from non-target <OBJECT>s; reverberation noise power level.   REAL PRESSURE_POWER_LEVEL 1099
REYNOLDS_NUMBER The non-dimensional ratio of the inertial force to the viscous force in fluid motion, usually ranging between 0,0 and 1,0 x 105; Reynolds number.   REAL PURE_NUMBER 1100
RF_DIRECTIVITY A characterization of the <DIRECTION>s from an <OBJECT> that produce the greatest reflectivity potential to electromagnetic radiation; radio frequency directivity.   ENUMERATION   1101
RF_REFRACTIVE_INDEX_MODIFIED The index of refraction for the propagation of electromagnetic waves at radio <<FREQUENCY>>s in an <ATMOSPHERE> that has been modified to account for the curvature of a <PLANETARY_SURFACE>. The index of refraction is the ratio of the <<WAVELENGTH>> or phase velocity of an electromagnetic wave in a vacuum to that in the medium or substance.   REAL PURE_NUMBER 1102
RGB_COLOUR_BLUE A number between 0 and 1 inclusive representing a linearly-scaled fraction specifying the blue component of a colour measurement in the RGB colour model.   REAL PURE_NUMBER 1103
RGB_COLOUR_GREEN A number between 0 and 1 inclusive representing a linearly-scaled fraction specifying the green component of a colour measurement in the RGB colour model.   REAL PURE_NUMBER 1104
RGB_COLOUR_RED A number between 0 and 1 inclusive representing a linearly-scaled fraction specifying the red component of a colour measurement in the RGB colour model.   REAL PURE_NUMBER 1105
RICHARDSON_NUMBER A non-dimensional number arising from the study of shearing flows of a stratified fluid defined as the product of the acceleration of gravity and a measure of the vertical stability, divided by the square of the vertical shear; Richardson number.   REAL PURE_NUMBER 1678
RIGHT_ABOVE_BANK_ANGLE The angle from the horizontal plane to the portion above the mean level of the <WATERBODY_SURFACE> of the right <WATERBODY_BANK> (facing downstream) of a <WATERCOURSE>.   REAL PLANE_ANGLE 1106
RIGHT_ABOVE_BANK_SLOPE The <<TERRAIN_SLOPE>> of the portion above the mean level of the <WATERBODY_SURFACE> of the right <WATERBODY_BANK> (facing downstream) of a <WATERCOURSE>.   REAL PURE_NUMBER 1107
RIGHT_BANK_HEIGHT The <<HEIGHT>> of the right <WATERBODY_BANK> (facing downstream) of a <WATERCOURSE> measured from the mean level of the <WATER> to the first break in <<TERRAIN_SLOPE>> above the mean level of the <WATER>.   REAL LENGTH 1108
RIGHT_BANK_SLOPE The <<TERRAIN_SLOPE>> of the right <WATERBODY_BANK> (facing downstream) of a <WATERCOURSE> measured from the mean level of the <WATER> to the first accessible break in slope above the mean level of the <WATER>.   REAL PURE_NUMBER 1109
RIGHT_BANK_SOIL_CONE_INDEX The <<SOIL_CONE_INDEX>> of a right <WATERBODY_BANK>.   REAL PRESSURE 1110
RIGHT_BANK_VEGETATION_DENSITY A number between 0 and 1 inclusive representing the linearly-scaled fractional density of <VEGETATION> found on the right <WATERBODY_BANK> (facing downstream) of a <WATERCOURSE> as a linearly-scaled fraction of bank <<AREA>>.   REAL PURE_NUMBER 1111
RIGHT_BELOW_BANK_ANGLE The angle from the horizontal plane to the portion below the mean level of the <WATERBODY_SURFACE> of the right <WATERBODY_BANK> (facing downstream) of a <WATERCOURSE>, below the mean level of the <WATER>.   REAL PLANE_ANGLE 1112
RIGHT_BELOW_BANK_SLOPE The <<TERRAIN_SLOPE>> of the portion below the mean level of the <WATERBODY_SURFACE> of the right <WATERBODY_BANK> (facing downstream) of a <WATERCOURSE>.   REAL PURE_NUMBER 1113
RIGHT_TERRAIN_BANK_SLOPE The <<TERRAIN_SLOPE>> of the right bank of a <TERRAIN_SURFACE_OBJECT> (for example: a <TERRAIN_CUT> and/or an <EMBANKMENT>).   REAL PURE_NUMBER 1114
RIP_CURRENT_PRESENT An indication that a <RIP_CURRENT> is present.   BOOLEAN   1115
RIP_CURRENT_SPEED The <<WATER_CURRENT_SPEED>> of a <RIP_CURRENT>.   REAL SPEED 1116
ROAD_ILLUMINATED_WIDTH That portion of the <<WIDTH>> of a <ROAD> that is illuminated.   REAL LENGTH 1703
ROAD_INTERCHANGE_TYPE The physical arrangement of a <ROAD_INTERCHANGE>; road interchange type.   ENUMERATION   1117
ROAD_JUNCTION_CONNECTIVITY The type of connectivity among <ROAD>s meeting at a junction.   ENUMERATION   1118
ROAD_LIGHTING_PRESENT An indication that a <ROAD> is illuminated by <STREET_LAMP>s; road lighting present.   BOOLEAN   1124
ROAD_MINIMUM_TRAVELLED_WAY-
_WIDTH
The minimum <<WIDTH>> the travelled way of a <ROAD>. The value is the sum of the <<WIDTH>>s of included <ROUTE_LANE_LAND>s. The <<WIDTH>>s of adjacent hard paved shoulders, <SIDEWALK>s, and other pathways are excluded.   REAL LENGTH 1125
ROAD_SECOND_TRAVELLED_WAY-
_WIDTH
The <<WIDTH>> of a second travelled way that is the lesser <<WIDTH>> of the two travelled ways in a divided <ROAD>. The value is the sum of the <<WIDTH>>s of included <ROUTE_LANE_LAND>s. The <<WIDTH>>s of adjacent hard paved shoulders, <SIDEWALK>s, and other pathways are excluded.   REAL LENGTH 1126
ROAD_TOTAL_USABLE_WIDTH The total usable <<WIDTH>> of a travelled way of a <ROAD>. The value is the sum of the <<WIDTH>>s of included <ROUTE_LANE_LAND>s, adjacent hard paved shoulders, unobstructed hard paved median, <SIDEWALK>s, and other pathways. The <<WIDTH>>s of parking lots, turn-offs, and unpaved medians are excluded.   REAL LENGTH 1127
ROAD_TYPE The type of a <ROAD>.   ENUMERATION   1128
ROCK_FORMATION_STRUCTURE The structure of a <ROCKY_OUTCROP> or other formation of <ROCK>.   ENUMERATION   1129
ROLL_ANGLE Given a right-handed orthonormal 3D coordinate system bound to an <OBJECT>, where the first axis of the coordinate system is directed through the front of the <OBJECT> and the second axis is directed through the right side of the <OBJECT>, the roll angle is the rotation about the first axis, with the positive rotation angle specified using the right-hand rule. Figure 6.22.1130 REAL PLANE_ANGLE 1130
ROLLING_STOCK_TYPE The type of a rolling-stock.   ENUMERATION   1131
ROOF_ASSEMBLY_TYPE The type of a <ROOF_ASSEMBLY>.   ENUMERATION   1132
ROOF_COVER_FRACTION A number between 0 and 1 inclusive representing the linearly-scaled fractional <<AREA>> of a <TRACT> that is covered by <ROOF>s. Zero means no <ROOF>s are present and one means the <TRACT> is completely covered.   REAL PURE_NUMBER 1133
ROOF_FRAMING_TYPE The framing type of a <ROOF>.   ENUMERATION   1134
ROOF_LOAD_BEARING_CAPACITY The maximum load per unit <<AREA>> that a <ROOF> can support; roof load bearing capacity.   REAL SURFACE_DENSITY 1135
ROOF_PREDOMINANT_PATTERN The predominant visual pattern of the <SURFACE> of a <ROOF>. The value usually describes the shape and arrangement of shingles, but may also describe smooth, corrugated, and gravel <ROOF>s.   ENUMERATION   1136
ROOF_PREDOMINANT_SURFACE-
_MATERIAL
The predominant outermost <MATERIAL> of which the <SURFACE> of a <ROOF> is constructed.   ENUMERATION   1137
ROOF_SHAPE The shape of a <ROOF>.   ENUMERATION   1138
ROOF_SHEATHING_TYPE The type of <MATERIAL> overlaid on the frame of a <ROOF> to which the roofing <MATERIAL> is then attached; roof sheathing type.   ENUMERATION   1139
ROOF_STYLE The architectural style of a <ROOF>.   ENUMERATION   1140
ROOM_CEILING_CONSTRUCTION_TYPE The type of <MATERIAL> and/or techniques used to construct a <ROOM_CEILING>; room ceiling construction type.   ENUMERATION   1141
ROOM_CEILING_SHAPE The shape of a <ROOM_CEILING>.   ENUMERATION   1704
ROUTE_ALTERNATIVE_DESIGNATION The alternative official designation assigned to a <LAND_TRANSPORTATION_ROUTE>.
EXAMPLES     "I-95", "A-1", "M-2".
  STRING   1142
ROUTE_CONSTRICTION_TYPE The type of a <ROUTE_CONSTRICTION>.   ENUMERATION   1143
ROUTE_CROSSING_TYPE The type of shape attributed to the crossing of two or more <TRANSPORTATION_ROUTE>s.   ENUMERATION   1144
ROUTE_DESIGNATION The official designation assigned to a <LAND_TRANSPORTATION_ROUTE>.
EXAMPLES     "I-95", "M-2", "A-1".
  STRING   1145
ROUTE_EXPANSION_TYPE The type of a <ROUTE_EXPANSION>.   ENUMERATION   1146
ROUTE_LANE_ADJACENCY The type of adjacency of a <ROUTE_LANE>.   ENUMERATION   1119
ROUTE_LANE_CONTROL_TYPE The type of traffic control at the end of a <ROUTE_LANE>.   ENUMERATION   1120
ROUTE_LANE_LAND_TURN The turning <DIRECTION> allowed at the end of a <ROUTE_LANE_LAND>.   ENUMERATION   1123
ROUTE_LANE_LIGHT_STATE The state of the <TRAFFIC_LIGHT> at the end of a <ROUTE_LANE>.   ENUMERATION   1121
ROUTE_LANE_PASSING The type of passing allowed on a <ROUTE_LANE>.   ENUMERATION   1122
ROUTE_WEATHER_TYPE The weather conditions under which a <LAND_TRANSPORTATION_ROUTE> is passable or remains open; route weather type.   ENUMERATION   1147
ROW_COUNT The number of rows comprising an <OBJECT>; row count.   COUNT   1148
ROW_DISTANCE The distance between each row comprising an <OBJECT>. This may be either a mean value, or a constant value where rows are equally spaced.   REAL LENGTH 1149
ROW_SPACING_INTERNAL The distance between the <COMPONENT>s within each row comprising an <OBJECT>; row spacing internal. The distance may be either a mean value or a constant value when <COMPONENT>s are equally spaced within a row.   REAL LENGTH 1150
RUBBLE_STABILITY The ability of <RUBBLE> to resist sliding or collapsing under stress; rubble stability.   ENUMERATION   1151
RUNWAY_APPROACH_ANGLE_LIGHT-
_INTENSITY
A number between 0 and 1 inclusive representing the linearly-scaled fractional intensity of the angle of approach indicator <LIGHT>s (for example: VASI and/or PAPI) on a <RUNWAY>. Zero means minimum intensity and one means maximum intensity.   REAL PURE_NUMBER 1152
RUNWAY_APPROACH_LIGHT-
_INTENSITY
A number between 0 and 1 inclusive representing the linearly-scaled fractional intensity of the approach <LIGHT>s on a <RUNWAY>. Zero means minimum intensity and one means maximum intensity.   REAL PURE_NUMBER 1153
RUNWAY_APPROACH_OIS_DISTANCE The section distance from the beginning of a <RUNWAY_APPROACH_OIS>.   REAL LENGTH 1154
RUNWAY_CENTRE_LIGHT_INTENSITY A number between 0 and 1 inclusive representing the linearly-scaled fractional intensity of the <LIGHT>s that mark the centre-line of a <RUNWAY>. Zero means minimum intensity and one means maximum intensity.   REAL PURE_NUMBER 1155
RUNWAY_COUNT The number of <RUNWAY>s at an <AERODROME>; runway count.   COUNT   1156
RUNWAY_DISPLACED_THRESHOLD-
_DISTANCE
The distance from the <RUNWAY_ENDPOINT> to that point of the <RUNWAY> usable for landing; runway displaced threshold distance.   REAL LENGTH 1157
RUNWAY_EDGE_LIGHT_INTENSITY A number between 0 and 1 inclusive representing the linearly-scaled fractional intensity of the edge <LIGHT>s on a <RUNWAY>. Zero means minimum intensity and one means maximum intensity.   REAL PURE_NUMBER 1158
RUNWAY_END An indication of the <<TERRAIN_ELEVATION>> of the end of a <RUNWAY>.   ENUMERATION   1159
RUNWAY_END_BEARING A two character string containing two decimal digits between "01" to "36" inclusive and defined as follows; runway end bearing. When there is a single <RUNWAY>, two parallel <RUNWAY>s, or three parallel <RUNWAY>s, the two digit whole number nearest to one-tenth of the <<MAGNETIC_AZIMUTH>> (for example: a <<MAGNETIC_AZIMUTH>> of 274 degrees would be represented as "27") of the centre-line of the <RUNWAY> in the direction of approach. When there are four to six parallel <RUNWAY>s, one set of two or three adjacent <RUNWAY>s shall be numbered with the two digit whole number nearest to one-tenth of the magnetic azimuth and the other set of two or three adjacent <RUNWAY>s numbered to the next nearest whole number. When these rules would give a single digit number, it shall be preceded by a zero.   CONSTRAINED_STRING   1160
RUNWAY_ENDPOINT_ELEVATION The <<ELEVATION>> of a <RUNWAY_ENDPOINT>.   REAL LENGTH 1161
RUNWAY_HIGH_END_IDENTIFIER The higher degree identification of a <RUNWAY>; runway high end identifier. The value is formatted in a Basic Latin string that begins with a two-character identifier ranging from 19-36, determined from the approach direction, derived from the <RUNWAY> magnetic heading (high end) rounded to the nearest ten arc degrees, and divided by ten. Designated in accordance with appropriate host nation documents. Analyst derived <RUNWAY> numbers will use six arc degrees as the break off point for the next highest number. In the case of parallel runways, a third character is added to differentiate between left (L), right (R), centre (C), or STOL (S) <RUNWAY> positions. A fourth character, (T) True is added when the <RUNWAY> identifier and heading are true with no magnetic variation applied.   CONSTRAINED_STRING   1162
RUNWAY_IDENTIFIER The identification of a <RUNWAY>. The value is formatted in a Basic Latin string that begins with a two-character identifier ranging from 01-36, derived from the <RUNWAY> geodetic heading, rounded to the nearest ten arc degrees and divided by ten. In the case of parallel <RUNWAY>s, a third character is added to differentiate between left (L), right (R), centre (C), or STOL (S) <RUNWAY> positions.   CONSTRAINED_STRING   1163
RUNWAY_LIGHTING_INTENSITY A number between 0 and 1 inclusive representing the linearly-scaled fractional intensity of the <LIGHTING> on a <RUNWAY>. Zero means minimum intensity and one means maximum intensity.   REAL PURE_NUMBER 1164
RUNWAY_LOW_END_IDENTIFIER The lower degree identification of a <RUNWAY>; runway low end identifier. The value is formatted in a Basic Latin string that begins with a two-character identifier ranging from 01-18, determined from the approach direction, derived from the <RUNWAY> magnetic heading (low end) rounded to the nearest ten arc degrees and divided by ten. Designated in accordance with appropriate host nation documents. Analyst derived <RUNWAY> numbers will use six arc degrees as the break off point for the next highest number. In the case of parallel <RUNWAY>s, a third character is added to differentiate between left (L), right (R), centre (C), and STOL (S) runway positions. A fourth character (T) True is added when the <RUNWAY> identifier and heading are true with no magnetic variation applied.   CONSTRAINED_STRING   1165
RUNWAY_OIS_QUADRANT A number identifying a quadrant of a <RUNWAY> OIS as defined by the centre-line of the <RUNWAY> and a perpendicular to the centre-line of the <RUNWAY> intersecting at the centre point of the <RUNWAY>. The centre point of the <RUNWAY> is defined as falling midway between the <RUNWAY_ENDPOINT>s. Quadrant identifiers are assigned such that quadrants 1 and 2 are on one side and quadrants 3 and 4 are on the other side of the centre-line of the <RUNWAY>. Quadrant identifiers only apply to the following imaginary air navigation OISs of <RUNWAY>s: inner horizontal, conical, and outer horizontal.   INDEX   1166
RUNWAY_POINT_ABEAM_TYPE The type of offline <OBJECT> to which the point on a <RUNWAY> is abeam.   ENUMERATION   1167
RUNWAY_PRIMARY_APPROACH-
_TRANSITIONAL_OIS_SECTION
A number identifying a section of the imaginary <RUNWAY> air navigation primary approach transitional OIS. The <RUNWAY> primary approach transitional OIS is divided into two groups of sections: (1) Those sections corresponding to (and lateral of) the <RUNWAY> primary OIS sections which are (a) the approximately 914,4 metres (3 000 feet) sections starting from the <RUNWAY_ENDPOINT>s and working inward, and (b) any middle section left over from (a); and (2) Those sections are lateral of the <RUNWAY> primary OIS and runway approach OIS, extending from the <RUNWAY> end outward. Each of these sections is numbered.   INDEX   1168
RUNWAY_PRIMARY_OIS_SECTION A number identifying a section of the imaginary <RUNWAY> air navigation primary OIS. The <RUNWAY> primary OIS is divided into sections: (a) the 60,96 metre (200 feet) sections of the <RUNWAY> primary OIS from the <RUNWAY_ENDPOINT>s and working outward, (b) the approximately 914,4 metres (3 000 feet) sections starting from the <RUNWAY_ENDPOINT>s and working inward, and (c) any middle section left over from (b). Each of these sections is numbered.   INDEX   1169
RUNWAY_REIL_INTENSITY A number between 0 and 1 inclusive representing the linearly-scaled fractional intensity of the end identifier <LIGHT>s on a <RUNWAY>; runway REIL intensity. Zero means unlit and one means maximum intensity.   REAL PURE_NUMBER 1170
RUNWAY_RELATIVE_POSITION The relative position of a <RUNWAY> in a <SET> of one to three parallel <RUNWAY>s with a given <<RUNWAY_END_BEARING>> as viewed by an approaching <AIRCRAFT> to the <SET> of <RUNWAY>s.   ENUMERATION   1171
RUNWAY_STOP_BAR_LIGHT-
_INTENSITY
A number between 0 and 1 inclusive representing the linearly-scaled fractional intensity of the stop bar <LIGHT>s on a <RUNWAY>. Zero means minimum intensity and one means maximum intensity.   REAL PURE_NUMBER 1172
RUNWAY_STROBE_LIGHT_INTENSITY A number between 0 and 1 inclusive representing the linearly-scaled fractional intensity of the strobe <LIGHT>s on a <RUNWAY>. Zero means minimum intensity and one means maximum intensity.   REAL PURE_NUMBER 1173
RUNWAY_SURFACE_CONDITION The condition of the <SURFACE> of a <RUNWAY> due to the weather.   ENUMERATION   1174
RUNWAY_TAKEOFF_DISTANCE-
_AVAILABLE
The <<LENGTH>> of takeoff distance on a <RUNWAY> plus the <<LENGTH>> of the <RUNWAY_OVERRUN>, if available.   REAL LENGTH 1175
RUNWAY_THRESHOLD_LIGHT-
_INTENSITY
A number between 0 and 1 inclusive representing the linearly-scaled fractional intensity of the threshold <LIGHT>s on a <RUNWAY>. Zero means minimum intensity and one means maximum intensity.   REAL PURE_NUMBER 1176
RUNWAY_TOUCH_DOWN_LIGHT-
_INTENSITY
A number between 0 and 1 inclusive representing the linearly-scaled fractional intensity of the touch down <LIGHT>s on a <RUNWAY>. Zero means minimum intensity and one means maximum intensity.   REAL PURE_NUMBER 1177
RUNWAY_TOUCHDOWN_ZONE-
_ELEVATION
The highest <<ELEVATION>> in the first 914,4 metres (3 000 feet) of the end of the usable landing <SURFACE> of a <RUNWAY>; runway touchdown zone elevation.   REAL LENGTH 1178
RUNWAY_VISIBILITY The <<VISIBILITY_DISTANCE>> along an identified <RUNWAY> determined from a specific point on the <RUNWAY> with the observer facing in the same <DIRECTION> as a pilot using the <RUNWAY>.   REAL LENGTH 1179
RUNWAY_VISUAL_RANGE The maximum horizontal distance down an identified <RUNWAY> that a pilot of an <AIRCRAFT> on the centre-line of the <RUNWAY> can see the surface <RUNWAY_MARKINGS> or the <LIGHT>s delineating the <RUNWAY> or identifying the centre-line of the <RUNWAY>; runway visual range.   REAL LENGTH 1180