44 lines
1.1 KiB
JavaScript
44 lines
1.1 KiB
JavaScript
self.importScripts("satellite.js");
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norad = ""
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groundStations = []
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TLE = []
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onmessage = function(e) {
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norad = e.data[0]
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TLE = e.data[1]
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getStations()
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}
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setInterval(function(){
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getStations()
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}, 20000);
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setInterval(function(){
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var satrec = self.satellite_js.twoline2satrec(TLE[1],TLE[2]);
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var gmst = self.satellite_js.gstime(new Date());
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var positionAndVelocity = self.satellite_js.propagate(satrec, new Date());
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var positionEci = positionAndVelocity.position
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var positionGd = self.satellite_js.eciToGeodetic(positionEci, gmst)
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var longitude = positionGd.longitude
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var latitude = positionGd.latitude
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postMessage([norad,TLE[0],[degress(latitude),degress(longitude)],groundStations])
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}, 500);
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function getStations(){
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var xhttp = new XMLHttpRequest();
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xhttp.onreadystatechange = function() {
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if (this.readyState == 4 && this.status == 200) {
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groundStations = JSON.parse(this.responseText);
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}
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};
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xhttp.open("GET", "/stations_from_sat/"+norad, true);
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xhttp.send();
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}
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function degress (radians) {
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return radians * 180 / Math.PI;
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}; |