Function getSatrec

shared/src/celestial.ts:96–108

(tle: Tle)

const satrecCache = new Map<string, satelliteNS.SatRec>();
function getSatrec(tle: Tle): satelliteNS.SatRec | null {
  const key = tle.line1 + tle.line2;
  let rec = satrecCache.get(key);
  if (!rec) {
    try {
      rec = satellite.twoline2satrec(tle.line1, tle.line2);
    } catch {
      return null;
    }
    satrecCache.set(key, rec);
  }
  return rec;
}

export function computeSky(date: Date, latDeg: number, lonDeg: number, o: SkyOpts): Sky {
  const observer = new Astronomy.Observer(latDeg, lonDeg, 0);