JavaScript:根据经纬度计算太阳、月亮升起和落下时间

 

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// geovindu   /*  (c) 2011-2015, Vladimir Agafonkin  SunCalc is a JavaScript library for calculating sun/moon position and light phases.  https://github.com/mourner/suncalc */   (function () { 'use strict';   // shortcuts for easier to read formulas   var PI   = Math.PI,     sin  = Math.sin,     cos  = Math.cos,     tan  = Math.tan,     asin = Math.asin,     atan = Math.atan2,     acos = Math.acos,     rad  = PI / 180;   // sun calculations are based on http://aa.quae.nl/en/reken/zonpositie.html formulas     // date/time constants and conversions   var dayMs = 1000 * 60 * 60 * 24,     J1970 = 2440588,     J2000 = 2451545;   function toJulian(date) { return date.valueOf() / dayMs - 0.5 + J1970; } function fromJulian(j)  { return new Date((j + 0.5 - J1970) * dayMs); } function toDays(date)   { return toJulian(date) - J2000; }     // general calculations for position   var e = rad * 23.4397; // obliquity of the Earth   function rightAscension(l, b) { return atan(sin(l) * cos(e) - tan(b) * sin(e), cos(l)); } function declination(l, b)    { return asin(sin(b) * cos(e) + cos(b) * sin(e) * sin(l)); }   function azimuth(H, phi, dec)  { return atan(sin(H), cos(H) * sin(phi) - tan(dec) * cos(phi)); } function altitude(H, phi, dec) { return asin(sin(phi) * sin(dec) + cos(phi) * cos(dec) * cos(H)); }   function siderealTime(d, lw) { return rad * (280.16 + 360.9856235 * d) - lw; }   function astroRefraction(h) {     if (h < 0) // the following formula works for positive altitudes only.         h = 0; // if h = -0.08901179 a div/0 would occur.       // formula 16.4 of "Astronomical Algorithms" 2nd edition by Jean Meeus (Willmann-Bell, Richmond) 1998.     // 1.02 / tan(h + 10.26 / (h + 5.10)) h in degrees, result in arc minutes -> converted to rad:     return 0.0002967 / Math.tan(h + 0.00312536 / (h + 0.08901179)); }   // general sun calculations   function solarMeanAnomaly(d) { return rad * (357.5291 + 0.98560028 * d); }   function eclipticLongitude(M) {       var C = rad * (1.9148 * sin(M) + 0.02 * sin(2 * M) + 0.0003 * sin(3 * M)), // equation of center         P = rad * 102.9372; // perihelion of the Earth       return M + C + P + PI; }   function sunCoords(d) {       var M = solarMeanAnomaly(d),         L = eclipticLongitude(M);       return {         dec: declination(L, 0),         ra: rightAscension(L, 0)     }; }     var SunCalc = {};     // calculates sun position for a given date and latitude/longitude   SunCalc.getPosition = function (date, lat, lng) {       var lw  = rad * -lng,         phi = rad * lat,         d   = toDays(date),           c  = sunCoords(d),         H  = siderealTime(d, lw) - c.ra;       return {         azimuth: azimuth(H, phi, c.dec),         altitude: altitude(H, phi, c.dec)     }; };     // sun times configuration (angle, morning name, evening name)   var times = SunCalc.times = [     [-0.833, 'sunrise',       'sunset'      ],     [  -0.3, 'sunriseEnd',    'sunsetStart' ],     [    -6, 'dawn',          'dusk'        ],     [   -12, 'nauticalDawn',  'nauticalDusk'],     [   -18, 'nightEnd',      'night'       ],     [     6, 'goldenHourEnd', 'goldenHour'  ] ];   // adds a custom time to the times config   SunCalc.addTime = function (angle, riseName, setName) {     times.push([angle, riseName, setName]); };     // calculations for sun times   var J0 = 0.0009;   function julianCycle(d, lw) { return Math.round(d - J0 - lw / (2 * PI)); }   function approxTransit(Ht, lw, n) { return J0 + (Ht + lw) / (2 * PI) + n; } function solarTransitJ(ds, M, L)  { return J2000 + ds + 0.0053 * sin(M) - 0.0069 * sin(2 * L); }   function hourAngle(h, phi, d) { return acos((sin(h) - sin(phi) * sin(d)) / (cos(phi) * cos(d))); } function observerAngle(height) { return -2.076 * Math.sqrt(height) / 60; }   // returns set time for the given sun altitude function getSetJ(h, lw, phi, dec, n, M, L) {       var w = hourAngle(h, phi, dec),         a = approxTransit(w, lw, n);     return solarTransitJ(a, M, L); }     // calculates sun times for a given date, latitude/longitude, and, optionally, // the observer height (in meters) relative to the horizon   SunCalc.getTimes = function (date, lat, lng, height) {       height = height || 0;       var lw = rad * -lng,         phi = rad * lat,           dh = observerAngle(height),           d = toDays(date),         n = julianCycle(d, lw),         ds = approxTransit(0, lw, n),           M = solarMeanAnomaly(ds),         L = eclipticLongitude(M),         dec = declination(L, 0),           Jnoon = solarTransitJ(ds, M, L),           i, len, time, h0, Jset, Jrise;         var result = {         solarNoon: fromJulian(Jnoon),         nadir: fromJulian(Jnoon - 0.5)     };       for (i = 0, len = times.length; i < len; i += 1) {         time = times[i];         h0 = (time[0] + dh) * rad;           Jset = getSetJ(h0, lw, phi, dec, n, M, L);         Jrise = Jnoon - (Jset - Jnoon);           result[time[1]] = fromJulian(Jrise);         result[time[2]] = fromJulian(Jset);     }       return result; };     // moon calculations, based on http://aa.quae.nl/en/reken/hemelpositie.html formulas   function moonCoords(d) { // geocentric ecliptic coordinates of the moon       var L = rad * (218.316 + 13.176396 * d), // ecliptic longitude         M = rad * (134.963 + 13.064993 * d), // mean anomaly         F = rad * (93.272 + 13.229350 * d),  // mean distance           l  = L + rad * 6.289 * sin(M), // longitude         b  = rad * 5.128 * sin(F),     // latitude         dt = 385001 - 20905 * cos(M);  // distance to the moon in km       return {         ra: rightAscension(l, b),         dec: declination(l, b),         dist: dt     }; }   SunCalc.getMoonPosition = function (date, lat, lng) {       var lw  = rad * -lng,         phi = rad * lat,         d   = toDays(date),           c = moonCoords(d),         H = siderealTime(d, lw) - c.ra,         h = altitude(H, phi, c.dec),         // formula 14.1 of "Astronomical Algorithms" 2nd edition by Jean Meeus (Willmann-Bell, Richmond) 1998.         pa = atan(sin(H), tan(phi) * cos(c.dec) - sin(c.dec) * cos(H));       h = h + astroRefraction(h); // altitude correction for refraction       return {         azimuth: azimuth(H, phi, c.dec),         altitude: h,         distance: c.dist,         parallacticAngle: pa     }; };     // calculations for illumination parameters of the moon, // based on http://idlastro.gsfc.nasa.gov/ftp/pro/astro/mphase.pro formulas and // Chapter 48 of "Astronomical Algorithms" 2nd edition by Jean Meeus (Willmann-Bell, Richmond) 1998.   SunCalc.getMoonIllumination = function (date) {       var d = toDays(date || new Date()),         s = sunCoords(d),         m = moonCoords(d),           sdist = 149598000, // distance from Earth to Sun in km           phi = acos(sin(s.dec) * sin(m.dec) + cos(s.dec) * cos(m.dec) * cos(s.ra - m.ra)),         inc = atan(sdist * sin(phi), m.dist - sdist * cos(phi)),         angle = atan(cos(s.dec) * sin(s.ra - m.ra), sin(s.dec) * cos(m.dec) -                 cos(s.dec) * sin(m.dec) * cos(s.ra - m.ra));       return {         fraction: (1 + cos(inc)) / 2,         phase: 0.5 + 0.5 * inc * (angle < 0 ? -1 : 1) / Math.PI,         angle: angle     }; };     function hoursLater(date, h) {     return new Date(date.valueOf() + h * dayMs / 24); }   // calculations for moon rise/set times are based on http://www.stargazing.net/kepler/moonrise.html article   SunCalc.getMoonTimes = function (date, lat, lng, inUTC) {     var t = new Date(date);     if (inUTC) t.setUTCHours(0, 0, 0, 0);     else t.setHours(0, 0, 0, 0);       var hc = 0.133 * rad,         h0 = SunCalc.getMoonPosition(t, lat, lng).altitude - hc,         h1, h2, rise, set, a, b, xe, ye, d, roots, x1, x2, dx;       // go in 2-hour chunks, each time seeing if a 3-point quadratic curve crosses zero (which means rise or set)     for (var i = 1; i <= 24; i += 2) {         h1 = SunCalc.getMoonPosition(hoursLater(t, i), lat, lng).altitude - hc;         h2 = SunCalc.getMoonPosition(hoursLater(t, i + 1), lat, lng).altitude - hc;           a = (h0 + h2) / 2 - h1;         b = (h2 - h0) / 2;         xe = -b / (2 * a);         ye = (a * xe + b) * xe + h1;         d = b * b - 4 * a * h1;         roots = 0;           if (d >= 0) {             dx = Math.sqrt(d) / (Math.abs(a) * 2);             x1 = xe - dx;             x2 = xe + dx;             if (Math.abs(x1) <= 1) roots++;             if (Math.abs(x2) <= 1) roots++;             if (x1 < -1) x1 = x2;         }           if (roots === 1) {             if (h0 < 0) rise = i + x1;             else set = i + x1;           } else if (roots === 2) {             rise = i + (ye < 0 ? x2 : x1);             set = i + (ye < 0 ? x1 : x2);         }           if (rise && set) break;           h0 = h2;     }       var result = {};       if (rise) result.rise = hoursLater(t, rise);     if (set) result.set = hoursLater(t, set);       if (!rise && !set) result[ye > 0 ? 'alwaysUp' : 'alwaysDown'] = true;       return result; };     // export as Node module / AMD module / browser variable if (typeof exports === 'object' && typeof module !== 'undefined') module.exports = SunCalc; else if (typeof define === 'function' && define.amd) define(SunCalc); else window.SunCalc = SunCalc;   }());

　　

 

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<!doctype html> <html> <head> <meta charset="utf-8">     <meta name="viewport" content="width=device-width, initial-scale=1.0">     <meta content="text/html; charset=utf-8" http-equiv="Content-Type"> <meta name="apple-moible-web-app-capable" content="yes"> <meta name="apple-moible-web-app-status-bar-style" content="black">   <title>SunCalc 太阳和月亮计算时落时间</title> <script src="js/suncalc.js">       </script> <script> //太阳日出日落计算 get today's sunlight times for London var times = SunCalc.getTimes(new Date(), 51.5, -0.1); console.log(times) // format sunrise time from the Date object var sunriseStr = times.sunrise.getHours() + ':' + times.sunrise.getMinutes(); console.log("London sun rise日出:"+sunriseStr) var sunsetStr=times.sunset.getHours()+":"+times.sunset.getMinutes(); console.log("London sun set日落:"+sunsetStr); //圳圳经纬度 22.5445741, 114.0545429 var shenzhentime= SunCalc.getTimes(new Date(), 22.5445741, 114.0545429); var shenzhensunriseStr = shenzhentime.sunrise.getHours() + ':' + shenzhentime.sunrise.getMinutes(); console.log("shenzhen sun rise日出:"+shenzhensunriseStr) var shenzhensunsetStr=shenzhentime.sunset.getHours()+":"+shenzhentime.sunset.getMinutes();  console.log("shenzhen sun set日落:"+shenzhensunsetStr)          //月亮    var shenzhenMoontime= SunCalc.getMoonTimes(new Date(), 22.5445741, 114.0545429);    var Moonrise=shenzhenMoontime.rise.getHours()+":"+shenzhenMoontime.rise.getMinutes(); console.log("shenzhen Moon rise月升:"+Moonrise)   var Moonset=shenzhenMoontime.set.getHours()+":"+shenzhenMoontime.set.getMinutes(); console.log("shenzhen Moon set月降:"+Moonset)                 // get position of the sun (azimuth and altitude) at today's sunrise var sunrisePos = SunCalc.getPosition(times.sunrise, 51.5, -0.1); console.log(sunrisePos) // get sunrise azimuth in degrees var sunriseAzimuth = sunrisePos.azimuth * 180 / Math.PI; console.log(":"+sunriseAzimuth)       </script> </head>   <body> </body> </html>

　　

 

https://github.com/fedarovich/SunCalc-Net
https://ypid.github.io/suncalc/suncalc/SunCalc.html
https://github.com/mourner/suncalc