context Context

{
  "@context": {
    "@version": 1.1,
    "schema": "https://schema.org/",
    "xsd": "http://www.w3.org/2001/XMLSchema#",
    "skos": "http://www.w3.org/2004/02/skos/core#",
    "rdfs": "http://www.w3.org/2000/01/rdf-schema#",
    "st": "https://www.space-track.org/vocabulary#",

    "GPRecord": {
      "@id": "st:GPRecord",
      "@type": "@id",
      "rdfs:comment": "A General Perturbations (GP) orbital element set in CCSDS OMM format"
    },

    "SATCATRecord": {
      "@id": "st:SATCATRecord",
      "@type": "@id",
      "rdfs:comment": "A satellite catalog record"
    },

    "CDMRecord": {
      "@id": "st:CDMRecord",
      "@type": "@id",
      "rdfs:comment": "A Conjunction Data Message record"
    },

    "NORAD_CAT_ID": {
      "@id": "st:noradCatId",
      "@type": "xsd:string",
      "rdfs:label": "NORAD Catalog Number",
      "rdfs:comment": "Unique integer identifier assigned by NORAD to each tracked Earth-orbiting object"
    },

    "OBJECT_NAME": {
      "@id": "schema:name",
      "@type": "xsd:string",
      "rdfs:label": "Object Name"
    },

    "OBJECT_ID": {
      "@id": "st:internationalDesignator",
      "@type": "xsd:string",
      "rdfs:label": "International Designator",
      "rdfs:comment": "COSPAR international designator in YYYY-NNNPPP format"
    },

    "INTLDES": {
      "@id": "st:internationalDesignator",
      "@type": "xsd:string"
    },

    "OBJECT_TYPE": {
      "@id": "st:objectType",
      "@type": "xsd:string",
      "rdfs:label": "Object Type",
      "rdfs:comment": "Classification of the tracked object: PAYLOAD, ROCKET BODY, DEBRIS, or UNKNOWN"
    },

    "EPOCH": {
      "@id": "st:epoch",
      "@type": "xsd:dateTime",
      "rdfs:label": "Epoch",
      "rdfs:comment": "Reference epoch for the orbital element set in UTC"
    },

    "CREATION_DATE": {
      "@id": "schema:dateCreated",
      "@type": "xsd:dateTime"
    },

    "MEAN_MOTION": {
      "@id": "st:meanMotion",
      "@type": "xsd:string",
      "rdfs:label": "Mean Motion",
      "rdfs:comment": "Average angular velocity in revolutions per day",
      "schema:unitText": "rev/day"
    },

    "ECCENTRICITY": {
      "@id": "st:eccentricity",
      "@type": "xsd:string",
      "rdfs:label": "Eccentricity",
      "rdfs:comment": "Dimensionless orbital shape parameter (0=circular, approaching 1=parabolic)"
    },

    "INCLINATION": {
      "@id": "st:inclination",
      "@type": "xsd:string",
      "rdfs:label": "Inclination",
      "rdfs:comment": "Angle between orbital plane and equatorial plane",
      "schema:unitText": "degrees"
    },

    "RA_OF_ASC_NODE": {
      "@id": "st:rightAscensionOfAscendingNode",
      "@type": "xsd:string",
      "rdfs:label": "Right Ascension of Ascending Node",
      "schema:unitText": "degrees"
    },

    "ARG_OF_PERICENTER": {
      "@id": "st:argumentOfPericenter",
      "@type": "xsd:string",
      "rdfs:label": "Argument of Pericenter",
      "schema:unitText": "degrees"
    },

    "MEAN_ANOMALY": {
      "@id": "st:meanAnomaly",
      "@type": "xsd:string",
      "rdfs:label": "Mean Anomaly",
      "schema:unitText": "degrees"
    },

    "BSTAR": {
      "@id": "st:bstarDragCoefficient",
      "@type": "xsd:string",
      "rdfs:label": "BSTAR Drag Coefficient",
      "schema:unitText": "Earth radii^-1"
    },

    "MEAN_MOTION_DOT": {
      "@id": "st:meanMotionFirstDerivative",
      "@type": "xsd:string",
      "rdfs:label": "Mean Motion First Derivative",
      "schema:unitText": "rev/day^2"
    },

    "MEAN_MOTION_DDOT": {
      "@id": "st:meanMotionSecondDerivative",
      "@type": "xsd:string",
      "rdfs:label": "Mean Motion Second Derivative",
      "schema:unitText": "rev/day^3"
    },

    "REV_AT_EPOCH": {
      "@id": "st:revAtEpoch",
      "@type": "xsd:string",
      "rdfs:label": "Revolution Number at Epoch"
    },

    "SEMIMAJOR_AXIS": {
      "@id": "st:semimajorAxis",
      "@type": "xsd:string",
      "rdfs:label": "Semi-Major Axis",
      "schema:unitText": "km"
    },

    "PERIOD": {
      "@id": "st:orbitalPeriod",
      "@type": "xsd:string",
      "rdfs:label": "Orbital Period",
      "schema:unitText": "minutes"
    },

    "APOGEE": {
      "@id": "st:apogeeAltitude",
      "@type": "xsd:string",
      "rdfs:label": "Apogee Altitude",
      "schema:unitText": "km"
    },

    "PERIGEE": {
      "@id": "st:perigeeAltitude",
      "@type": "xsd:string",
      "rdfs:label": "Perigee Altitude",
      "schema:unitText": "km"
    },

    "DECAY_DATE": {
      "@id": "st:decayDate",
      "@type": "xsd:date",
      "rdfs:label": "Decay Date",
      "rdfs:comment": "Date of orbital decay/reentry; null if still in orbit"
    },

    "TLE_LINE0": {
      "@id": "st:tleLine0",
      "@type": "xsd:string",
      "rdfs:label": "TLE Line 0 (Name)"
    },

    "TLE_LINE1": {
      "@id": "st:tleLine1",
      "@type": "xsd:string",
      "rdfs:label": "TLE Line 1"
    },

    "TLE_LINE2": {
      "@id": "st:tleLine2",
      "@type": "xsd:string",
      "rdfs:label": "TLE Line 2"
    },

    "SATNAME": {
      "@id": "schema:name",
      "@type": "xsd:string",
      "rdfs:label": "Satellite Name"
    },

    "COUNTRY": {
      "@id": "schema:countryOfOrigin",
      "@type": "xsd:string",
      "rdfs:label": "Country Code"
    },

    "LAUNCH": {
      "@id": "schema:datePublished",
      "@type": "xsd:date",
      "rdfs:label": "Launch Date"
    },

    "SITE": {
      "@id": "st:launchSiteCode",
      "@type": "xsd:string",
      "rdfs:label": "Launch Site Code"
    },

    "DECAY": {
      "@id": "st:decayDate",
      "@type": "xsd:date",
      "rdfs:label": "Decay Date"
    },

    "RCS_SIZE": {
      "@id": "st:radarCrossSectionSize",
      "@type": "xsd:string",
      "rdfs:label": "Radar Cross-Section Size",
      "rdfs:comment": "Size category: SMALL (<0.1 m^2), MEDIUM (0.1-1.0 m^2), LARGE (>1.0 m^2)"
    },

    "CURRENT": {
      "@id": "st:currentlyTracked",
      "@type": "xsd:string",
      "rdfs:label": "Currently Tracked",
      "rdfs:comment": "Y if the object is currently tracked in orbit; N if decayed"
    },

    "TCA": {
      "@id": "st:timeOfClosestApproach",
      "@type": "xsd:dateTime",
      "rdfs:label": "Time of Closest Approach"
    },

    "MIN_RNG": {
      "@id": "st:minimumRange",
      "@type": "xsd:string",
      "rdfs:label": "Minimum Range",
      "schema:unitText": "meters"
    },

    "PC": {
      "@id": "st:probabilityOfCollision",
      "@type": "xsd:string",
      "rdfs:label": "Probability of Collision"
    },

    "SAT1_ID": {
      "@id": "st:primaryObjectId",
      "@type": "xsd:string",
      "rdfs:label": "Primary Object NORAD ID"
    },

    "SAT2_ID": {
      "@id": "st:secondaryObjectId",
      "@type": "xsd:string",
      "rdfs:label": "Secondary Object NORAD ID"
    },

    "MSG_EPOCH": {
      "@id": "st:messageEpoch",
      "@type": "xsd:dateTime",
      "rdfs:label": "Message Epoch"
    },

    "DECAY_EPOCH": {
      "@id": "st:predictedDecayEpoch",
      "@type": "xsd:dateTime",
      "rdfs:label": "Predicted Decay Epoch"
    },

    "ORIGINATOR": {
      "@id": "schema:creator",
      "@type": "xsd:string",
      "rdfs:label": "Originator"
    }
  }
}