Opening Our Data

// Normally you would install OOTK via npm and import it like this:
// import { Satellite } from 'ootk';

// We've already included OOTK on this page, so you can use it in the browser like this:
var Satellite = window.ootk.Satellite;

// Public demo key. Get your own free key at https://keeptrack.space (user menu > API Key).
var apiKey = 'kt_demo_00000000000000000000000000';

fetch('https://api.keeptrack.space/v4/sats/25544', {
  headers: { 'X-API-Key': apiKey },
})
  .then((res) => res.json())
  .then(([data]) => {
    // /v4/sats/:id returns an array, so we grab the first result.
    const sat = new Satellite({ name: data.NAME, tle1: data.TLE_LINE_1, tle2: data.TLE_LINE_2 });

    console.log(sat.lla());  // Position in latitude, longitude, altitude
    console.log(sat.eci());  // Position and velocity in Earth-centered inertial coordinates
    console.log(sat.ecef()); // Position in Earth-centered, Earth-fixed coordinates
  })
  .catch((err) => console.error(err));
    

var Satellite = window.ootk.Satellite;
var apiKey = 'kt_demo_00000000000000000000000000';

fetch('https://api.keeptrack.space/v4/sat/25544/omm', {
  headers: { 'X-API-Key': apiKey },
})
  .then((res) => res.json())
  .then((omm) => {
    // OMM fields map straight into OOTK, no fixed-width parsing required.
    const sat = Satellite.fromOmm(omm);

    console.log(sat.lla());  // Position in latitude, longitude, altitude
    console.log(sat.name);   // OBJECT_NAME from the OMM record
  })
  .catch((err) => console.error(err));
    

var Satellite = window.ootk.Satellite;
var apiKey = 'kt_demo_00000000000000000000000000';

fetch('https://api.keeptrack.space/v4/sats/5', {
  headers: { 'X-API-Key': apiKey },
})
  .then((res) => res.json())
  .then(([data]) => {
    const sat = new Satellite({ name: data.NAME, tle1: data.TLE_LINE_1, tle2: data.TLE_LINE_2 });

    console.group('Satellite Details');
    console.log('International Designator: ' + sat.intlDes); // International Designator
    console.log('Epoch Year: ' + sat.epochYear); // Epoch Year
    console.log('Epoch Day: ' + sat.epochDay); // Epoch Day
    console.log('Bstar (Drag Coefficient): ' + sat.bstar); // Bstar (Drag Coefficient)
    console.log('Inclination (degrees): ' + sat.inclination); // inclination in degrees
    console.log('Right Ascension (degrees): ' + sat.rightAscension); // right ascension of the ascending node in degrees
    console.log('Eccentricity: ' + sat.eccentricity); // eccentricity
    console.log('Argument of Perigee (degrees): ' + sat.argOfPerigee); // argument of perigee in degrees
    console.log('Mean Anomaly (degrees): ' + sat.meanAnomaly); // mean anomaly in degrees
    console.log('Mean Motion (revolutions per day): ' + sat.meanMotion); // mean motion in revolutions per day
    console.log('Period (minutes): ' + sat.period); // period in minutes
    console.log('Apogee (kilometers): ' + sat.apogee); // apogee in kilometers
    console.log('Perigee (kilometers): ' + sat.perigee); // perigee in kilometers
    console.groupEnd();
  })
  .catch((err) => console.error(err));
    

var Satellite = window.ootk.Satellite;
var GroundStation = window.ootk.GroundStation;
var apiKey = 'kt_demo_00000000000000000000000000';

// Your location: latitude and longitude in degrees, altitude in kilometers.
var observer = new GroundStation({ lat: 40.0, lon: -75.0, alt: 0.1 });

// ONE request fetches every active object in the catalog (tens of thousands).
fetch('https://api.keeptrack.space/v4/sats/brief', {
  headers: { 'X-API-Key': apiKey },
})
  .then((res) => res.json())
  .then((catalog) => {
    const now = new Date();
    const overhead = [];

    // type 1 = payload. Skip rocket bodies and debris to keep the demo fast.
    for (const entry of catalog.filter((e) => e.type === 1)) {
      try {
        const sat = new Satellite({ name: entry.name, tle1: entry.tle1, tle2: entry.tle2 });
        const rae = sat.rae(observer, now); // range, azimuth, elevation from your location

        if (rae && rae.el > 10) {
          overhead.push({
            name: entry.name || 'UNKNOWN',
            country: entry.country || '?',
            elevationDeg: Number(rae.el.toFixed(1)),
            azimuthDeg: Number(rae.az.toFixed(1)),
            rangeKm: Math.round(rae.rng),
          });
        }
      } catch (e) {
        // Skip objects whose elements will not propagate (e.g. recently decayed).
      }
    }

    overhead.sort((a, b) => b.elevationDeg - a.elevationDeg);
    console.log(overhead.length + ' payloads above 10 degrees elevation right now:');
    console.table(overhead.slice(0, 25));

    // Recompute for any time you like: sat.rae(observer, futureDate).
    // All of this math runs locally in OOTK. No more API calls needed.
  })
  .catch((err) => console.error(err));