2022-12-28 10:30:18 +00:00
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<!DOCTYPE html>
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2023-02-02 15:45:58 +00:00
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<html lang="en">
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2022-12-28 10:30:18 +00:00
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<head>
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<meta charset="utf-8">
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<meta http-equiv="X-UA-Compatible" content="IE=edge">
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<meta name="viewport" content="width=device-width, initial-scale=1">
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<title>Calculate communication azimuth and great-circle distance</title>
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<!-- Bootstrap -->
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<link href="https://cdn.ghink.net/assembly/bootstrap/4.6.1/css/bootstrap.min.css" rel="stylesheet">
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<!-- Favicon -->
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<link rel="icon" href="https://cdn.ghink.net/image/avatar/Bigsk.png" type="image/png">
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<script src="https://cdn.ghink.net/js/vue/2.6.14/vue.min.js"></script>
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<script>
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function sgn(n) {
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if (n > 0) {
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return 1;
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} else if (n < 0) {
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return -1;
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} else {
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return 0;
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}
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}
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function fndeg(d, m, s) {
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return d + sgn(d) * (m / 60 + s/ 3600);
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}
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function fnacs(x) {
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return Math.PI / 2 - 2 * Math.atan(x / (1 + Math.sqrt(1 - x * x)));
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}
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function calc(tlongd, tlatd, rlongd, rlatd) {
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let ro = 6370;
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let gcdkm;
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let btrd;
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let brtd;
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let r2d = 180 / Math.PI;
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let d2r = Math.PI / 180;
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let tlong = tlongd * d2r;
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let tlat = tlatd * d2r;
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let rlong = rlongd * d2r;
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let rlat = rlatd * d2r;
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if (tlong < 0) {
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tlong = Math.PI * 2 + tlong;
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}
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if (rlong < 0) {
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rlong = Math.PI * 2 + rlong;
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}
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let dlong = tlong - rlong;
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if (Math.abs(dlong) > Math.PI) {
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dlong = dlong - Math.PI * 2 * sgn(dlong);
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}
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let x = Math.sin(tlat) * Math.sin(rlat) + Math.cos(tlat) * Math.cos(rlat) * Math.cos(dlong);
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let gcd = fnacs(x);
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if (gcd < 0.0000001) {
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gcd = 0.0000001;
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}
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if (Math.cos(tlat) - 0.0000001 <= 0) {
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let btr;
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if (tlat >= 0) {
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btr = 0;
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} else {
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btr = Math.PI;
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}
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if (Math.cos(rlat) - 0.0000001 > 0) {
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x = (Math.sin(tlat) - Math.sin(rlat) * Math.cos(gcd)) / (Math.cos(rlat) * Math.sin(gcd));
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let brt = fnacs(x);
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if (dlong < 0) {
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brt = Math.PI * 2 - brt;
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}
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gcdkm = gcd * ro;
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btrd = btr * r2d;
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brtd = brt * r2d;
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} else {
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let brt;
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if (rlat >= 0) {
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brt = 0;
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} else {
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brt = Math.PI;
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}
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gcdkm = gcd * ro;
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btrd = btr * r2d;
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brtd = brt * r2d;
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}
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} else {
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x = (Math.sin(rlat) - Math.sin(tlat) * Math.cos(gcd)) / (Math.cos(tlat) * Math.sin(gcd));
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let btr = fnacs(x);
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if (dlong > 0) {
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btr = Math.PI * 2 - btr;
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}
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if (Math.cos(rlat) - 0.0000001 > 0) {
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x = (Math.sin(tlat) - Math.sin(rlat) * Math.cos(gcd)) / (Math.cos(rlat) * Math.sin(gcd));
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let brt = fnacs(x);
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if (dlong < 0) {
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brt = Math.PI * 2 - brt;
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}
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gcdkm = gcd * ro;
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btrd = btr * r2d;
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brtd = brt * r2d;
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} else {
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let brt;
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if (rlat >= 0) {
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brt = 0;
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} else {
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brt = Math.PI;
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}
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gcdkm = gcd * ro;
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btrd = btr * r2d;
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brtd = brt * r2d;
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}
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}
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return [gcdkm, btrd, brtd];
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}
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</script>
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<div class="row">
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<div class="col-12">
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<h1>Calculate communication azimuth and great-circle distance</h1>
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</div>
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</div>
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</div>
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</div>
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</section>
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<section>
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<div class="container">
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<div class="row" id="app">
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<div class="col-md-1"></div>
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<div class="col-md-5">
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<form class="form-horizontal" role="form">
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<div class="form-inline">
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<label><b>Longitude of sending point</b> </label>
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<input type="number" class="form-control" v-model="tlongdd" max="180" min="-180" placeholder="Degree(s)" style="width:70px; height:30px;"> Degree(s)
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<input type="number" class="form-control" v-model="tlongdm" max="60" min="-60" placeholder="Minute(s)" style="width:70px; height:30px;"> Minute(s)
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<input type="number" class="form-control" v-model="tlongds" max="60" min="-60" placeholder="Second(s)" style="width:70px; height:30px;"> Second(s)
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</div>
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<div class="form-inline">
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<label><b>Latitude of sending point</b> </label>
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<input type="number" class="form-control" v-model="tlatdd" max="90" min="-90" placeholder="Degree(s)" style="width:70px; height:30px;"> Degree(s)
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<input type="number" class="form-control" v-model="tlatdm" max="60" min="-60" placeholder="Minute(s)" style="width:70px; height:30px;"> Minute(s)
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<input type="number" class="form-control" v-model="tlatds" max="60" min="-60" placeholder="Second(s)" style="width:70px; height:30px;"> Second(s)
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</div>
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<div class="form-inline">
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<label><b>Longitude of receving point</b> </label>
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<input type="number" class="form-control" v-model="rlongdd" max="180" min="-180" placeholder="Degree(s)" style="width:70px; height:30px;"> Degree(s)
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<input type="number" class="form-control" v-model="rlongdm" max="60" min="-60" placeholder="Minute(s)" style="width:70px; height:30px;"> Minute(s)
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<input type="number" class="form-control" v-model="rlongds" max="60" min="-60" placeholder="Second(s)" style="width:70px; height:30px;"> Second(s)
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</div>
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<div class="form-inline">
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<label><b>Latitude of receving point</b> </label>
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<input type="number" class="form-control" v-model="rlatdd" max="90" min="-90" placeholder="Degree(s)" style="width:70px; height:30px;"> Degree(s)
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<input type="number" class="form-control" v-model="rlatdm" max="60" min="-60" placeholder="Minute(s)" style="width:70px; height:30px;"> Minute(s)
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<input type="number" class="form-control" v-model="rlatds" max="60" min="-60" placeholder="Second(s)" style="width:70px; height:30px;"> Second(s)
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</div>
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</form>
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</div>
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<div class="col-md-6">
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<h5>Calculation results: </h5>
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<h5>The circle distance is {{gcdkm}}(km)</h5>
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<h5>The azimuth angle from the sending point to the receiving point is {{btrdd}}Degree(s) {{btrdm}}Minute(s) {{btrds}}Second(s)</h5>
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<h5>The azimuth angle from the receiving point to the sending point is {{brtdd}}Degree(s) {{brtdm}}Minute(s) {{brtds}}Second(s)</h5>
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</div>
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</div>
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<div class="text-center">
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<hr>
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<h5>Algorithm source: Amateur Radio Communications 童效勇BA1AA 陈方BA4RC Appendix 18</h5>
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<h5>Language translation: Bigsk (<a href="https://gitea.ghink.net/bigsk/commu_a_c" target="_blank">Git Repo</a>)</h5>
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</div>
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</div>
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</section>
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<hr>
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<script>
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function result(object) {
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let tlongd = fndeg(parseInt(object.tlongdd), parseInt(object.tlongdm), parseInt(object.tlongds))
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let tlatd = fndeg(parseInt(object.tlatdd), parseInt(object.tlatdm), parseInt(object.tlatds))
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let rlongd = fndeg(parseInt(object.rlongdd), parseInt(object.rlongdm), parseInt(object.rlongds))
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let rlatd = fndeg(parseInt(object.rlatdd), parseInt(object.rlatdm), parseInt(object.rlatds))
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return calc(tlongd, tlatd, rlongd, rlatd)
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}
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new Vue({
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el: '#app',
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data: {
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tlongdd: 103,
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tlongdm: 45,
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tlongds: 0,
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tlatdd: 36,
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tlatdm: 2,
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tlatds: 0,
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rlongdd: 121,
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rlongdm: 29,
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rlongds: 0,
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rlatdd: 31,
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rlatdm: 14,
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rlatds: 0
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},
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computed: {
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gcdkm: function () {
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return result(this)[0]
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},
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btrdd: function () {
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let d = Math.trunc(result(this)[1])
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return d
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},
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btrdm: function () {
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let d = Math.trunc(result(this)[1])
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let m = Math.trunc((result(this)[1] - d) * 60)
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return m
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},
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btrds: function () {
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let d = Math.trunc(result(this)[1])
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let m = Math.trunc((result(this)[1] - d) * 60)
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let s = Math.trunc((result(this)[1] - d - m / 60) * 3600)
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return s
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},
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brtdd: function () {
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let d = Math.trunc(result(this)[2])
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let m = Math.trunc((result(this)[2] - d) * 60)
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return d
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},
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brtdm: function () {
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let d = Math.trunc(result(this)[2])
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let m = Math.trunc((result(this)[2] - d) * 60)
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return m
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},
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brtds: function () {
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let d = Math.trunc(result(this)[2])
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let m = Math.trunc((result(this)[2] - d) * 60)
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let s = Math.trunc((result(this)[2] - d - m / 60) * 3600)
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return s
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}
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}
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})
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let date = new Date();
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</script>
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<footer class="text-center">
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<div class="container">
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<div class="row">
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<p style="color: #516069"><strong>Copyright © Ian Xia <script>document.write(date.getFullYear().toString());</script> All rights reserved</strong></p>
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</div>
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</div>
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</footer>
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<!-- jQuery (necessary for Bootstrap's JavaScript plugins) -->
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<script src="https://cdn.ghink.net/js/jquery/jquery-3.6.0.min.js"></script>
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<!-- Grey Filter Detector -->
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<script>
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$.ajax({
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type: "GET",
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2022-12-29 07:00:26 +00:00
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url: "https://open.geh.ink/grey_filter",
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2022-12-28 10:30:18 +00:00
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dataType: "json",
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success: function(data, textStatus){
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2022-12-29 07:00:26 +00:00
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for (let i=0;i<data["content"]["accurate_slot"].length;i++) {
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2022-12-28 10:30:18 +00:00
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// Accurate Slot
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2022-12-29 07:00:26 +00:00
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if (Date.now()/1000 >= data["content"]["accurate_slot"][i][0] && Date.now()/1000 <= data["content"]["accurate_slot"][i][1]) {
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2022-12-28 10:30:18 +00:00
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$("html").css({
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'-webkit-filter': 'grayscale(100%)',
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'-moz-filter': 'grayscale(100%)',
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'-ms-filter': 'grayscale(100%)',
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'-o-filter': 'grayscale(100%)',
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'filter': 'progid:DXImageTransform.Microsoft.BasicImage(grayscale=1)',
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'_filter': 'none'
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});
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break;
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}
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}
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2022-12-29 07:00:26 +00:00
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for (let i=0;i<data["content"]["day_slot"].length;i++) {
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2022-12-28 10:30:18 +00:00
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// Day Slot
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let begin = new Date(
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date.getFullYear().toString() + "-" +
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2022-12-29 07:00:26 +00:00
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data["content"]["day_slot"][i][0][0].toString() + "-" +
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data["content"]["day_slot"][i][0][1].toString() + " " +
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data["content"]["day_slot"][i][0][2].toString() + ":" +
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data["content"]["day_slot"][i][0][3].toString() + ":" +
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data["content"]["day_slot"][i][0][4].toString()
|
2022-12-28 10:30:18 +00:00
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)
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let end = new Date(
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date.getFullYear().toString() + "-" +
|
2022-12-29 07:00:26 +00:00
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data["content"]["day_slot"][i][1][0].toString() + "-" +
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data["content"]["day_slot"][i][1][1].toString() + " " +
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data["content"]["day_slot"][i][1][2].toString() + ":" +
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data["content"]["day_slot"][i][1][3].toString() + ":" +
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data["content"]["day_slot"][i][1][4].toString()
|
2022-12-28 10:30:18 +00:00
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|
)
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if (Date.now() >= begin.getTime() && Date.now() <= end.getTime()) {
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|
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|
$("html").css({
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|
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|
'-webkit-filter': 'grayscale(100%)',
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|
'-moz-filter': 'grayscale(100%)',
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|
'-ms-filter': 'grayscale(100%)',
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|
'-o-filter': 'grayscale(100%)',
|
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|
'filter': 'progid:DXImageTransform.Microsoft.BasicImage(grayscale=1)',
|
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|
'_filter': 'none'
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|
|
|
});
|
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|
|
|
break;
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|
}
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|
}
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|
}
|
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|
});
|
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|
</script>
|
|
|
|
|
<!-- Include all compiled plugins (below), or include individual files as needed -->
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|
|
|
|
<script src="https://cdn.ghink.net/js/popper/1.16.1/popper.min.js"></script>
|
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|
|
<script src="https://cdn.ghink.net/assembly/bootstrap/4.6.1/js/bootstrap.min.js"></script>
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</body>
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|
</html>
|
