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2022-03-01 21:18:57
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var zao,wan,yearjs,monthjs,dayjs,riseSetForm_mos_selectedIndex;
var eqTimejs;//riseSetForm["eqTime"].value
var solarDecjs;//riseSetForm["solarDec"].value
var shiqu;//latLongForm["hrsToGMT"].value
var latDegjs;//f["latDeg"].value
var latMinjs;//f["latMin"].value == latLongForm["latMin"].value
var latSecjs;//f["latSec"].value == latLongForm["latSec"].value
var lonMinjs;//f["lonMin"].value == latLongForm["lonMin"].value
var lonSecjs;//f["lonSec"].value == latLongForm["lonSec"].value
var lonDegjs;//f["lonDeg"].value == latLongForm["lonDeg"].value
var latDegjs;//latLongForm["latDeg"].value
var utcsunrisejs;//riseSetForm["utcsunrise"].value //日出世界时
var solnoonjs;//riseSetForm["solnoon"].value //正午时间当地时
var utcsolnoonjs;//riseSetForm["utcsolnoon"].value //正午时间世界时
//输出日出日落时间
var sunrisejsD;//输出时间标签的id的text()方法; //riseSetForm["sunrise"].value //日出当地时id
var sunrisejs="js_sunrise";//输出时间标签的id的text()方法; //riseSetForm["sunrise"].value //日出当地时id
var sunsetjsd;//输出时间标签的id的text()方法; //riseSetForm["sunset"].value //日落当地时id
var sunsetjs="js_sunset";//输出时间标签的id的text()方法; //riseSetForm["sunset"].value //日落当地时id
("#"+sunsetjs).text(val);//sunsetjs id值见上面定义末尾
}
function js_sunrisejs_J(val){
$("#"+sunrisejs).text(val);//sunsetjs id值见上面定义末尾
}
//计算日出日落开始
function month(name, numdays, abbr)
{
this.name = name;
this.numdays = numdays;
this.abbr = abbr;
}
function ans(daySave,value)
{
this.daySave = daySave;
this.value = value;
}
function city(name, lat, lng, zoneHr)
{
this.name = name;
this.lat = lat;
this.lng = lng;
this.zoneHr = zoneHr;
}
var monthList = new Array(); // list of months and days for non-leap year
var i = 0;
monthList[i++] = new month("一月", 31, "Jan");
monthList[i++] = new month("二月", 28, "Feb");
monthList[i++] = new month("三月", 31, "Mar");
monthList[i++] = new month("四月", 30, "Apr");
monthList[i++] = new month("五月", 31, "May");
monthList[i++] = new month("六月", 30, "Jun");
monthList[i++] = new month("七月", 31, "Jul");
monthList[i++] = new month("八月", 31, "Aug");
monthList[i++] = new month("九月", 30, "Sep");
monthList[i++] = new month("十月", 31, "Oct");
monthList[i++] = new month("十一月", 30, "Nov");
monthList[i++] = new month("十二月", 31, "Dec");
var YesNo = new Array(); //Daylight Saving array
i=0;
YesNo[i++] = new ans("No",0);
YesNo[i++] = new ans("Yes",60);
var City = new Array();
j = 0;
City[j++] = new city("",0,0,0);
City[j++] = new city("中国城市",0,0,0);
City[j++] = new city("北京", 39.9,-115.4,-8);
City[j++] = new city("天津", 39.1,-116.2,-8);
City[j++] = new city("上海", 31.2, -120.4,-8);
City[j++] = new city("石家庄",38.0,-113.4,-8);
City[j++] = new city("太原", 37.8,-111.5,-8);
City[j++] = new city("呼和浩特",40.8,-110.7,-8);
City[j++] = new city("大连", 38.9,-120.6,-8);
City[j++] = new city("沈阳",41.8,-122.4,-8);
City[j++] = new city("长春",43.9,-124.3,-8);
City[j++] = new city("吉林", 43.8,-125.5,-8);
City[j++] = new city("哈尔滨",45.7,-125.6,-8);
City[j++] = new city("济南",36.6,-117.0,-8);
City[j++] = new city("青岛",36.0,-119.3,-8);
City[j++] = new city("烟台",37.5,-120.4,-8);
City[j++] = new city("西安",34.2,-107.9,-8);
City[j++] = new city("兰州",36.0,-102.7,-8);
City[j++] = new city("西宁",36.6,-100.8,-8);
City[j++] = new city("南京",32.0,-117.7,-8);
City[j++] = new city("无锡",31.5,-119.3,-8);
City[j++] = new city("苏州",31.3,-119.6,-8);
City[j++] = new city("徐州",34.2,-116.1,-8);
City[j++] = new city("合肥",31.8,-116.6,-8);
City[j++] = new city("杭州",30.2,-119.1,-8);
City[j++] = new city("宁波",29.8,-120.5,-8);
City[j++] = new city("南昌",28.6,-114.9,-8);
City[j++] = new city("九江",29.7,-114.9,-8);
City[j++] = new city("武汉",30.5,-113.2,-8);
City[j++] = new city("长沙",28.2,111.9,-8);
City[j++] = new city("湘潭",27.8,-111.9,-8);
City[j++] = new city("乌鲁木齐",43.8,-86.6,-8);
City[j++] = new city("哈密",42.8,-92.4,-8);
City[j++] = new city("桂林",25.2,-109.2,-8);
City[j++] = new city("柳州",24.3,-108.4,-8);
City[j++] = new city("南宁",22.8,-107.3,-8);
City[j++] = new city("广州",23.1,-112.2,-8);
City[j++] = new city("汕头",23.3,-115.6,-8);
City[j++] = new city("海口",20.0,-109.3,-8);
City[j++] = new city("成都",30.6,-103.1,-8);
City[j++] = new city("重庆",29.5,-105.5,-8);
City[j++] = new city("贵阳",26.6,-105.7,-8);
City[j++] = new city("昆明",25.0,-101.7,-8);
City[j++] = new city("拉萨",29.6,-90.1,-8);
City[j++] = new city("郑州",34.7,-112.6,-8);
City[j++] = new city("洛阳",34.6,-111.4,-8);
City[j++] = new city("福州",26.6,-118.3,-8);
City[j++] = new city("厦门",24.4,-117.1,-8);
City[j++] = new city("台北",25.0,-120.5,-8);
City[j++] = new city("*",22.0,-101.3,-8);
City[j++] = new city("香港",22.25,-114.1667,-8);
City[j++] = new city("景德镇",29.3,-117.2,-8);
City[j++] = new city("世界城市",0,0,0);
City[j++] = new city("纽约,美国",40.7167,74.0167,5);
City[j++] = new city("柏林,德国",52.33, -13.30, -1);
City[j++] = new city("孟买,印度", 18.9333, -72.8333, -5.5);
City[j++] = new city("布宜诺斯艾利斯, 阿根廷", -34.60,58.45,3);
City[j++] = new city("开罗,埃及", 30.10,-31.3667,-2);
City[j++] = new city("开普敦,南非",-33.9167,-18.3667,-2);
City[j++] = new city("加拉加斯,委内瑞拉", 10.50,66.9333,4);
City[j++] = new city("赫尔辛基,芬兰", 60.1667, -24.9667,-2);
City[j++] = new city("洛杉机,美国",34.05,118.233,8);
City[j++] = new city("耶路撒冷,巴基斯坦", 31.7833, -35.2333, -2);
City[j++] = new city("伦敦,英国", 51.50, 0.1667,0);
City[j++] = new city("墨西哥城,墨西哥", 19.4,99.15,6);
City[j++] = new city("莫斯科,俄罗斯", 55.75, -37.5833, -3);
City[j++] = new city("新德里,印度",28.6, -77.2, -5.5);
City[j++] = new city("渥太华,加拿大", 45.41667,75.7,5);
City[j++] = new city("巴黎,法国", 48.8667, -2.667, -1);
City[j++] = new city("圣保罗,巴西",-22.90,43.2333,3);
City[j++] = new city("利雅得,沙特阿拉伯", 24.633, -46.71667, -3);
City[j++] = new city("罗马,意大利",41.90, -12.4833,-1);
City[j++] = new city("悉尼,澳大利亚",-33.8667,-151.2167,-10);
City[j++] = new city("东京,日本", 35.70, -139.7667, -9);
City[j++] = new city("苏黎世,瑞士", 47.3833, -8.5333,-1);
function setLatLong(f, index)
{
// Decimal degrees are passed in the array. Temporarily store these
// degs in lat and lon deg and have convLatLong modify them.
latDeg = City[index].lat;
lonDegjs = City[index].lng;
// These are needed to prevent iterative adding of min and sec when
// set button is clicked.
latMinjs = 0;
latSecjs = 0;
lonMinjs = 0;
lonSecjs = 0;
//call convLatLong to convert decimal degrees into table form.
convLatLong(f);
//Local time zone value set in table
shiqu = City[index].zoneHr;
}
function isLeapYear(yr)
{
return ((yr % 4 == 0 && yr % 100 != 0) || yr % 400 == 0);
}
function isPosInteger(inputVal)
{
inputStr = ("" + inputVal);
for (var i = 0; i < inputStr.length; i++) {
var oneChar = inputStr.charAt(i);
if (oneChar < "0" || oneChar > "9")
return false;
}
return true;
}
function isInteger(inputVal)
{
inputStr = "" + inputVal;
if(inputStr == "NaN") return false;
if(inputStr == "-NaN") return false;
for (var i = 0; i < inputStr.length; i++)
{
var oneChar = inputStr.charAt(i);
if (i == 0 && (oneChar == "-" || oneChar == "+"))
{
continue;
}
if (oneChar < "0" || oneChar > "9")
{
return false;
}
}
return true;
}
function isNumber(inputVal)
{
var oneDecimal = false;
var inputStr = "" + inputVal;
for (var i = 0; i < inputStr.length; i++)
{
var oneChar = inputStr.charAt(i);
if (i == 0 && (oneChar == "-" || oneChar == "+"))
{
continue;
}
if (oneChar == "." && !oneDecimal)
{
oneDecimal = true;
continue;
}
if (oneChar < "0" || oneChar > "9")
{
return false;
}
}
return true;
}
function isValidInput(f, index, latLongForm)
{
if (dayjs == "")
{ // see if the day field is empty
alert("You must enter a day before attempting the calculation.");
return false;
}
else if (yearjs == "")
{ // see if the year field is empty
alert("You must enter a year before attempting the calculation.");
return false;
}
else if (!isPosInteger(dayjs) || dayjs == 0)
{
alert("The day must be a positive integer.");
return false;
}
else if (!isInteger(yearjs))
{
alert("The year must be an integer.");
return false;
}
else if ( (yearjs < -1000) || (yearjs > 3000) )
{
alert("The algorithm used is not valid for years outside of/nthe range -1000 to 3000.");
return false;
}
else if ((index != 1) && (dayjs > monthList[index].numdays))
{
alert("There are only " + monthList[index].numdays + " days in "
+ monthList[index].name + ".");
return false;
}
else if (index == 1)
{
if (isLeapYear(yearjs)) { // year entered is a leap year
if (dayjs > (monthList[index].numdays + 1))
{
alert("There are only " + (monthList[index].numdays + 1)
+ " days in " + monthList[index].name + ".");
return false;
}
else
return true;
}
else
{ // year entered is not a leap year
if (dayjs > monthList[index].numdays)
{
alert("There are only " + monthList[index].numdays
+ " days in " + monthList[index].name + ".");
return false;
}
else
return true;
}
}
else
return true;
}
function convLatLong(f)
{
var neg = 0;
if(latDeg[0] == '-')
{
neg = 1;
}
if(neg != 1)
{
var latSeconds = (parseFloat(latDeg))*3600
+ parseFloat(latMinjs)*60
+ parseFloat(latSecjs)*1;
latDeg = Math.floor(latSeconds/3600);
latMinjs = Math.floor((latSeconds
- (parseFloat(latDeg)*3600))/60);
latSecjs = Math.floor((latSeconds
- (parseFloat(latDeg)*3600)
- (parseFloat(latMinjs)*60)) + 0.5);
}
else if(parseFloat(latDeg) > -1)
{
var latSeconds = parseFloat(latDeg)*3600
- parseFloat(latMinjs)*60
- parseFloat(latSecjs)*1;
latDeg = "-0";
latMinjs = Math.floor((-latSeconds)/60);
latSecjs = Math.floor( (-latSeconds
- (parseFloat(latMinjs)*60)) + 0.5);
}
else
{
var latSeconds = parseFloat(latDeg)*3600
- parseFloat(latMinjs)*60
- parseFloat(latSecjs)*1;
latDeg = Math.ceil(latSeconds/3600);
latMinjs = Math.floor((-latSeconds
+ (parseFloat(latDeg)*3600))/60);
latSecjs = Math.floor((-latSeconds
+ (parseFloat(latDeg)*3600)
- (parseFloat(latMinjs)*60)) + 0.5);
}
neg = 0;
if(lonDegjs[0] == '-')
{
neg = 1;
}
if(neg != 1)
{
var lonSeconds = parseFloat(lonDegjs)*3600
+ parseFloat(lonMinjs)*60
+ parseFloat(lonSecjs)*1;
lonDegjs = Math.floor(lonSeconds/3600);
lonMinjs = Math.floor((lonSeconds
- (parseFloat(lonDegjs)*3600))/60);
lonSecjs = Math.floor((lonSeconds
- (parseFloat(lonDegjs)*3600)
- (parseFloat(lonMinjs))*60) + 0.5);
}
else if(parseFloat(lonDegjs) > -1)
{
var lonSeconds = parseFloat(lonDegjs)*3600
- parseFloat(lonMinjs)*60
- parseFloat(lonSecjs)*1;
lonDegjs = "-0";
lonMinjs = Math.floor((-lonSeconds)/60);
lonSecjs = Math.floor((-lonSeconds
- (parseFloat(lonMinjs)*60)) + 0.5);
}
else
{
var lonSeconds = parseFloat(lonDegjs)*3600
- parseFloat(lonMinjs)*60
- parseFloat(lonSecjs)*1;
lonDegjs = Math.ceil(lonSeconds/3600);
lonMinjs = Math.floor((-lonSeconds
+ (parseFloat(lonDegjs)*3600))/60);
lonSecjs = Math.floor((-lonSeconds
+ (parseFloat(lonDegjs)*3600)
- (parseFloat(lonMinjs)*60)) + 0.5);
}
if(latSeconds > 324000)
{
alert("You have entered an invalid latitude.\n Setting lat= 89.8.");
latDeg = 89.8;
latMinjs = 0;
latSecjs = 0;
}
if(latSeconds < -324000)
{
alert("You have entered an invalid latitude.\n Setting lat= -89.8.");
latDeg = -89.8;
latMinjs = 0;
latSecjs = 0;
}
if(lonSeconds > 648000)
{
alert("You have entered an invalid longitude.\n Setting lon= 180.");
lonDegjs = 180;
lonMinjs = 0;
lonSecjs = 0;
}
if(lonSeconds < -648000)
{
alert("You have entered an invalid longitude.\n Setting lon= -180.");
lonDegjs = -180;
lonMinjs = 0;
lonSecjs =0;
}
}
function radToDeg(angleRad)
{
return (180.0 * angleRad / Math.PI);
}
function degToRad(angleDeg)
{
return (Math.PI * angleDeg / 180.0);
}
function calcDayOfYear(mn, dy, lpyr)
{
var k = (lpyr ? 1 : 2);
var doy = Math.floor((275 * mn)/9) - k * Math.floor((mn + 9)/12) + dy -30;
return doy;
}
function calcDayOfWeek(juld)
{
var A = (juld + 1.5) % 7;
var DOW = (A==0)?"Sunday":(A==1)?"Monday":(A==2)?"Tuesday":(A==3)?"Wednesday":(A==4)?"Thursday":(A==5)?"Friday":"Saturday";
return DOW;
}
function calcJD(year, month, day)
{
if (month <= 2) {
year -= 1;
month += 12;
}
var A = Math.floor(year/100);
var B = 2 - A + Math.floor(A/4);
var JD = Math.floor(365.25*(year + 4716)) + Math.floor(30.6001*(month+1)) + day + B - 1524.5;
return JD;
}
function calcDateFromJD(jd)
{
var z = Math.floor(jd + 0.5);
var f = (jd + 0.5) - z;
if (z < 2299161) {
var A = z;
} else {
alpha = Math.floor((z - 1867216.25)/36524.25);
var A = z + 1 + alpha - Math.floor(alpha/4);
}
var B = A + 1524;
var C = Math.floor((B - 122.1)/365.25);
var D = Math.floor(365.25 * C);
var E = Math.floor((B - D)/30.6001);
var day = B - D - Math.floor(30.6001 * E) + f;
var month = (E < 14) ? E - 1 : E - 13;
var year = (month > 2) ? C - 4716 : C - 4715;
// alert ("date: " + day + "-" + monthList[month-1].name + "-" + year);
return (day + "-" + monthList[month-1].name + "-" + year);
}
function calcDayFromJD(jd)
{
var z = Math.floor(jd + 0.5);
var f = (jd + 0.5) - z;
if (z < 2299161) {
var A = z;
} else {
alpha = Math.floor((z - 1867216.25)/36524.25);
var A = z + 1 + alpha - Math.floor(alpha/4);
}
var B = A + 1524;
var C = Math.floor((B - 122.1)/365.25);
var D = Math.floor(365.25 * C);
var E = Math.floor((B - D)/30.6001);
var day = B - D - Math.floor(30.6001 * E) + f;
var month = (E < 14) ? E - 1 : E - 13;
var year = (month > 2) ? C - 4716 : C - 4715;
return ((day<10 ? "0" : "") + day + monthList[month-1].abbr);
}
function calcTimeJulianCent(jd)
{
var T = (jd - 2451545.0)/36525.0;
return T;
}
function calcJDFromJulianCent(t)
{
var JD = t * 36525.0 + 2451545.0;
return JD;
}
function calcGeomMeanLongSun(t)
{
var L0 = 280.46646 + t * (36000.76983 + 0.0003032 * t);
while(L0 > 360.0)
{
L0 -= 360.0;
}
while(L0 < 0.0)
{
L0 += 360.0;
}
return L0; // in degrees
}
function calcGeomMeanAnomalySun(t)
{
var M = 357.52911 + t * (35999.05029 - 0.0001537 * t);
return M; // in degrees
}
function calcEccentricityEarthOrbit(t)
{
var e = 0.016708634 - t * (0.000042037 + 0.0000001267 * t);
return e; // unitless
}
function calcSunEqOfCenter(t)
{
var m = calcGeomMeanAnomalySun(t);
var mrad = degToRad(m);
var sinm = Math.sin(mrad);
var sin2m = Math.sin(mrad+mrad);
var sin3m = Math.sin(mrad+mrad+mrad);
var C = sinm * (1.914602 - t * (0.004817 + 0.000014 * t)) + sin2m * (0.019993 - 0.000101 * t) + sin3m * 0.000289;
return C; // in degrees
}
function calcSunTrueLong(t)
{
var l0 = calcGeomMeanLongSun(t);
var c = calcSunEqOfCenter(t);
var O = l0 + c;
return O; // in degrees
}
function calcSunTrueAnomaly(t)
{
var m = calcGeomMeanAnomalySun(t);
var c = calcSunEqOfCenter(t);
var v = m + c;
return v; // in degrees
}
function calcSunRadVector(t)
{
var v = calcSunTrueAnomaly(t);
var e = calcEccentricityEarthOrbit(t);
var R = (1.000001018 * (1 - e * e)) / (1 + e * Math.cos(degToRad(v)));
return R; // in AUs
}
function calcSunApparentLong(t)
{
var o = calcSunTrueLong(t);
var omega = 125.04 - 1934.136 * t;
var lambda = o - 0.00569 - 0.00478 * Math.sin(degToRad(omega));
return lambda; // in degrees
}
function calcMeanObliquityOfEcliptic(t)
{
var seconds = 21.448 - t*(46.8150 + t*(0.00059 - t*(0.001813)));
var e0 = 23.0 + (26.0 + (seconds/60.0))/60.0;
return e0; // in degrees
}
function calcObliquityCorrection(t)
{
var e0 = calcMeanObliquityOfEcliptic(t);
var omega = 125.04 - 1934.136 * t;
var e = e0 + 0.00256 * Math.cos(degToRad(omega));
return e; // in degrees
}
function calcSunRtAscension(t)
{
var e = calcObliquityCorrection(t);
var lambda = calcSunApparentLong(t);
var tananum = (Math.cos(degToRad(e)) * Math.sin(degToRad(lambda)));
var tanadenom = (Math.cos(degToRad(lambda)));
var alpha = radToDeg(Math.atan2(tananum, tanadenom));
return alpha; // in degrees
}
function calcSunDeclination(t)
{
var e = calcObliquityCorrection(t);
var lambda = calcSunApparentLong(t);
var sint = Math.sin(degToRad(e)) * Math.sin(degToRad(lambda));
var theta = radToDeg(Math.asin(sint));
return theta; // in degrees
}
function calcEquationOfTime(t)
{
var epsilon = calcObliquityCorrection(t);
var l0 = calcGeomMeanLongSun(t);
var e = calcEccentricityEarthOrbit(t);
var m = calcGeomMeanAnomalySun(t);
var y = Math.tan(degToRad(epsilon)/2.0);
y *= y;
var sin2l0 = Math.sin(2.0 * degToRad(l0));
var sinm = Math.sin(degToRad(m));
var cos2l0 = Math.cos(2.0 * degToRad(l0));
var sin4l0 = Math.sin(4.0 * degToRad(l0));
var sin2m = Math.sin(2.0 * degToRad(m));
var Etime = y * sin2l0 - 2.0 * e * sinm + 4.0 * e * y * sinm * cos2l0
- 0.5 * y * y * sin4l0 - 1.25 * e * e * sin2m;
return radToDeg(Etime)*4.0; // in minutes of time
}
function calcHourAngleSunrise(lat, solarDec)
{
var latRad = degToRad(lat);
var sdRad = degToRad(solarDec)
var HAarg = (Math.cos(degToRad(90.833))/(Math.cos(latRad)*Math.cos(sdRad))-Math.tan(latRad) * Math.tan(sdRad));
var HA = (Math.acos(Math.cos(degToRad(90.833))/(Math.cos(latRad)*Math.cos(sdRad))-Math.tan(latRad) * Math.tan(sdRad)));
return HA; // in radians
}
function calcHourAngleSunset(lat, solarDec)
{
var latRad = degToRad(lat);
var sdRad = degToRad(solarDec)
var HAarg = (Math.cos(degToRad(90.833))/(Math.cos(latRad)*Math.cos(sdRad))-Math.tan(latRad) * Math.tan(sdRad));
var HA = (Math.acos(Math.cos(degToRad(90.833))/(Math.cos(latRad)*Math.cos(sdRad))-Math.tan(latRad) * Math.tan(sdRad)));
return -HA; // in radians
}
function calcSunriseUTC(JD, latitude, longitude)
{
var t = calcTimeJulianCent(JD);
// *** First pass to approximate sunrise
var eqTime = calcEquationOfTime(t);
var solarDec = calcSunDeclination(t);
var hourAngle = calcHourAngleSunrise(latitude, solarDec);
var delta = longitude - radToDeg(hourAngle);
var timeDiff = 4 * delta; // in minutes of time
var timeUTC = 720 + timeDiff - eqTime; // in minutes
// alert("eqTime = " + eqTime + "\nsolarDec = " + solarDec + "\ntimeUTC = " + timeUTC);
// *** Second pass includes fractional jday in gamma calc
var newt = calcTimeJulianCent(calcJDFromJulianCent(t) + timeUTC/1440.0);
eqTime = calcEquationOfTime(newt);
solarDec = calcSunDeclination(newt);
hourAngle = calcHourAngleSunrise(latitude, solarDec);
delta = longitude - radToDeg(hourAngle);
timeDiff = 4 * delta;
timeUTC = 720 + timeDiff - eqTime; // in minutes
// alert("eqTime = " + eqTime + "\nsolarDec = " + solarDec + "\ntimeUTC = " + timeUTC);
return timeUTC;
}
function calcSolNoonUTC(t, longitude)
{
var newt = calcTimeJulianCent(calcJDFromJulianCent(t) + 0.5 + longitude/360.0);
var eqTime = calcEquationOfTime(t);
var solarNoonDec = calcSunDeclination(t);
var solNoonUTC = 720 + (longitude * 4) - eqTime; // min
return solNoonUTC;
}
function calcSunsetUTC(JD, latitude, longitude)
{
var t = calcTimeJulianCent(JD);
// First calculates sunrise and approx length of day
var eqTime = calcEquationOfTime(t);
var solarDec = calcSunDeclination(t);
var hourAngle = calcHourAngleSunset(latitude, solarDec);
var delta = longitude - radToDeg(hourAngle);
var timeDiff = 4 * delta;
var timeUTC = 720 + timeDiff - eqTime;
// first pass used to include fractional day in gamma calc
var newt = calcTimeJulianCent(calcJDFromJulianCent(t) + timeUTC/1440.0);
eqTime = calcEquationOfTime(newt);
solarDec = calcSunDeclination(newt);
hourAngle = calcHourAngleSunset(latitude, solarDec);
delta = longitude - radToDeg(hourAngle);
timeDiff = 4 * delta;
timeUTC = 720 + timeDiff - eqTime; // in minutes
return timeUTC;
}
function getLatitude(latLongForm)
{
var neg = 0;
var degs = parseFloat(latDegjs);
if (latDegjs[0] == '-')
{
neg = 1;
}
var mins = parseFloat(latMinjs);
var secs = parseFloat(latSecjs);
if(neg != 1)
{
var decLat = degs + (mins / 60) + (secs / 3600);
}
else if(neg == 1)
{
var decLat = degs - (mins / 60) - (secs / 3600);
} else
{
return -9999;
}
return decLat;
}
function getLongitude(latLongForm)
{
var neg = 0;
var degs = parseFloat(lonDegjs);
if (lonDegjs[0] == '-')
{
neg = 1;
}
var mins = parseFloat(lonMinjs);
var secs = parseFloat(lonSecjs);
var decLon = degs + (mins / 60) + (secs / 3600);
if(neg != 1)
{
var decLon = degs + (mins / 60) + (secs / 3600);
} else if(neg == 1)
{
var decLon = degs - (mins / 60) - (secs / 3600);
} else
{
return -9999;
}
return decLon;
}
function findRecentSunrise(jd, latitude, longitude)
{
var julianday = jd;
var time = calcSunriseUTC(julianday, latitude, longitude);
while(!isNumber(time)){
julianday -= 1.0;
time = calcSunriseUTC(julianday, latitude, longitude);
}
return julianday;
}
function findRecentSunset(jd, latitude, longitude)
{
var julianday = jd;
var time = calcSunsetUTC(julianday, latitude, longitude);
while(!isNumber(time)){
julianday -= 1.0;
time = calcSunsetUTC(julianday, latitude, longitude);
}
return julianday;
}
function findNextSunrise(jd, latitude, longitude)
{
var julianday = jd;
var time = calcSunriseUTC(julianday, latitude, longitude);
while(!isNumber(time)){
julianday += 1.0;
time = calcSunriseUTC(julianday, latitude, longitude);
}
return julianday;
}
function findNextSunset(jd, latitude, longitude)
{
var julianday = jd;
var time = calcSunsetUTC(julianday, latitude, longitude);
while(!isNumber(time)){
julianday += 1.0;
time = calcSunsetUTC(julianday, latitude, longitude);
}
return julianday;
}
function timeString(minutes)
{
var floatHour = minutes / 60;
var hour = Math.floor(floatHour);
var floatMinute = 60 * (floatHour - Math.floor(floatHour));
var minute = Math.floor(floatMinute);
var floatSec = 60 * (floatMinute - Math.floor(floatMinute));
var second = Math.floor(floatSec);
var timeStr = hour + ":";
if (minute < 10) // i.e. only one digit
timeStr += "0" + minute + ":";
else
timeStr += minute + ":";
if (second < 10) // i.e. only one digit
timeStr += "0" + second;
else
timeStr += second;
return timeStr;
}
function timeStringShortAMPM(minutes, JD)
{
var julianday = JD;
var floatHour = minutes / 60;
var hour = Math.floor(floatHour);
var floatMinute = 60 * (floatHour - Math.floor(floatHour));
var minute = Math.floor(floatMinute);
var floatSec = 60 * (floatMinute - Math.floor(floatMinute));
var second = Math.floor(floatSec);
var PM = false;
minute += (second >= 30)? 1 : 0;
if (minute >= 60)
{
minute -= 60;
hour ++;
}
var daychange = false;
if (hour > 23)
{
hour -= 24;
daychange = true;
julianday += 1.0;
}
if (hour < 0)
{
hour += 24;
daychange = true;
julianday -= 1.0;
}
if (hour > 11)
{
hour -= 12;
PM = true;
}
if (hour == 0)
{
PM = false;
hour = 12;
}
var timeStr = hour + ":";
if (minute < 10) // i.e. only one digit
timeStr += "0" + minute + ((PM)?"PM":"AM");
else
timeStr += "" + minute + ((PM)?"PM":"AM");
if (daychange) return timeStr + " " + calcDayFromJD(julianday);
return timeStr;
}
function timeStringAMPMDate(minutes, JD)
{
var julianday = JD;
var floatHour = minutes / 60;
var hour = Math.floor(floatHour);
var floatMinute = 60 * (floatHour - Math.floor(floatHour));
var minute = Math.floor(floatMinute);
var floatSec = 60 * (floatMinute - Math.floor(floatMinute));
var second = Math.floor(floatSec);
minute += (second >= 30)? 1 : 0;
if (minute >= 60)
{
minute -= 60;
hour ++;
}
if (hour > 23)
{
hour -= 24;
julianday += 1.0;
}
if (hour < 0)
{
hour += 24;
julianday -= 1.0;
}
var PM = false;
if (hour > 11)
{
hour -= 12;
PM = true;
}
if (hour == 0)
{
PM = false;
hour = 12;
}
var timeStr = hour + ":";
if (minute < 10) // i.e. only one digit
timeStr += "0" + minute + ((PM)?"PM":"AM");
else
timeStr += minute + ((PM)?"PM":"AM");
return timeStr + " " + calcDayFromJD(julianday);
}
function timeStringDate(minutes, JD)
{
var julianday = JD;
var floatHour = minutes / 60;
var hour = Math.floor(floatHour);
var floatMinute = 60 * (floatHour - Math.floor(floatHour));
var minute = Math.floor(floatMinute);
var floatSec = 60 * (floatMinute - Math.floor(floatMinute));
var second = Math.floor(floatSec);
minute += (second >= 30)? 1 : 0;
if (minute >= 60)
{
minute -= 60;
hour ++;
}
var daychange = false;
if (hour > 23)
{
hour -= 24;
julianday += 1.0;
daychange = true;
}
if (hour < 0)
{
hour += 24;
julianday -= 1.0;
daychange = true;
}
var timeStr = hour + ":";
if (minute < 10) // i.e. only one digit
timeStr += "0" + minute;
else
timeStr += minute;
if (daychange) return timeStr + " " + calcDayFromJD(julianday);
return timeStr;
}
function calcSun(riseSetForm, latLongForm, index, index2)
{
if(index2 != 0)
{
setLatLong(latLongForm, index2);
}
var latitude = getLatitude(latLongForm);
var longitude = getLongitude(latLongForm);
var indexRS = riseSetForm_mos_selectedIndex;
if (isValidInput(riseSetForm, indexRS, latLongForm))
{
if((latitude >= -90) && (latitude < -89.8))
{
alert("All latitudes between 89.8 and 90 S\n will be set to -89.8");
latDegjs = -89.8;
latitude = -89.8;
}
if ((latitude <= 90) && (latitude > 89.8))
{
alert("All latitudes between 89.8 and 90 N\n will be set to 89.8");
latDegjs = 89.8;
latitude = 89.8;
}
var JD = (calcJD(parseFloat(yearjs), indexRS + 1, parseFloat(dayjs)));
var dow = calcDayOfWeek(JD);
var doy = calcDayOfYear(indexRS + 1, parseFloat(dayjs), isLeapYear(yearjs));
var T = calcTimeJulianCent(JD);
var alpha = calcSunRtAscension(T);
var theta = calcSunDeclination(T);
var Etime = calcEquationOfTime(T);
var eqTime = Etime;
var solarDec = theta;
eqTimejs = (Math.floor(100*eqTime))/100;
solarDecjs = (Math.floor(100*(solarDec)))/100;
var nosunrise = false;
var riseTimeGMT = calcSunriseUTC(JD, latitude, longitude);
if (!isNumber(riseTimeGMT))
{
nosunrise = true;
}
var nosunset = false;
var setTimeGMT = calcSunsetUTC(JD, latitude, longitude);
if (!isNumber(setTimeGMT))
{
nosunset = true;
}
var daySavings = YesNo[index].value; // = 0 (no) or 60 (yes)
var zone = shiqu;
if(zone > 12 || zone < -12.5)
{
alert("The offset must be between -12.5 and 12. \n Setting \"Off-Set\"=0");
zone = "0";
shiqu = zone;
}
if (!nosunrise) // Sunrise was found
{
var riseTimeLST = riseTimeGMT - (60 * zone) + daySavings;
// in minutes
var riseStr = timeStringShortAMPM(riseTimeLST, JD);
var utcRiseStr = timeStringDate(riseTimeGMT, JD);
sunrisejsD=riseStr;
var s1 = sunrisejsD[1]==":"?"0"+sunrisejsD.substring(0, 4):sunrisejsD.substring(0, 5);
js_sunrisejs_J(s1);
utcsunrisejs = utcRiseStr;
}
if (!nosunset) // Sunset was found
{
var setTimeLST = setTimeGMT - (60 * zone) + daySavings;
var setStr = timeStringShortAMPM(setTimeLST, JD);
var utcSetStr = timeStringDate(setTimeGMT, JD);
sunsetjsd = setStr;
if(setStr.indexOf("PM")>0){
if(setStr.indexOf(":")==1){
var ajs=parseInt(setStr.substring(0, 1));
ajs+=12;
sunsetjsd=ajs+setStr.substring(1, 4);
}else{
var ajs=parseInt(setStr.substring(0, 2));
ajs+=12;
sunsetjsd=ajs+setStr.substring(1, 4);
}
}
js_sunsetjs_J(sunsetjsd);
// riseSetForm["utcsunset"].value = utcSetStr;
}
var solNoonGMT = calcSolNoonUTC(T, longitude);
var solNoonLST = solNoonGMT - (60 * zone) + daySavings;
var solnStr = timeString(solNoonLST);
var utcSolnStr = timeString(solNoonGMT);
solnoonjs = solnStr;
utcsolnoonjs = utcSolnStr;
convLatLong(latLongForm);
if(nosunrise)
{
utcsunrisejs = "";
if ( ((latitude > 66.4) && (doy > 79) && (doy < 267)) ||
((latitude < -66.4) && ((doy < 83) || (doy > 263))) )
{
newjd = findRecentSunrise(JD, latitude, longitude);
newtime = calcSunriseUTC(newjd, latitude, longitude)
- (60 * zone) + daySavings;
if (newtime > 1440)
{
newtime -= 1440;
newjd += 1.0;
}
if (newtime < 0)
{
newtime += 1440;
newjd -= 1.0;
}
sunrisejsD =
timeStringAMPMDate(newtime, newjd);
utcsunrisejs = "prior sunrise";
}
else if ( ((latitude > 66.4) && ((doy < 83) || (doy > 263))) ||
((latitude < -66.4) && (doy > 79) && (doy < 267)) )
{
newjd = findNextSunrise(JD, latitude, longitude);
newtime = calcSunriseUTC(newjd, latitude, longitude)
- (60 * zone) + daySavings;
if (newtime > 1440)
{
newtime -= 1440;
newjd += 1.0;
}
if (newtime < 0)
{
newtime += 1440;
newjd -= 1.0;
}
sunrisejsD =
timeStringAMPMDate(newtime, newjd);
utcsunrisejs = "next sunrise";
}
else
{
alert("Cannot Find Sunrise!");
}
}
if(nosunset)
{
// riseSetForm["utcsunset"].value = "";
if ( ((latitude > 66.4) && (doy > 79) && (doy < 267)) ||
((latitude < -66.4) && ((doy < 83) || (doy > 263))) )
{
newjd = findNextSunset(JD, latitude, longitude);
newtime = calcSunsetUTC(newjd, latitude, longitude)
- (60 * zone) + daySavings;
if (newtime > 1440)
{
newtime -= 1440;
newjd += 1.0;
}
if (newtime < 0)
{
newtime += 1440;
newjd -= 1.0;
}
sunsetjsd =
timeStringAMPMDate(newtime, newjd);
if(setStr.indexOf("PM")>0){
if(setStr.indexOf(":")==1){
var ajs=parseInt(setStr.substring(0, 1));
ajs+=12;
sunsetjsd=ajs+setStr.substring(1, 4);
}else{
var ajs=parseInt(setStr.substring(0, 2));
ajs+=12;
sunsetjsd=ajs+setStr.substring(1, 4);
}
}
js_sunsetjs_J(sunsetjsd);
// riseSetForm["utcsunset"].value = "next sunset";
utcsolnoonjs = "";
}
else if ( ((latitude > 66.4) && ((doy < 83) || (doy > 263))) ||
((latitude < -66.4) && (doy > 79) && (doy < 267)) )
{
newjd = findRecentSunset(JD, latitude, longitude);
newtime = calcSunsetUTC(newjd, latitude, longitude)
- (60 * zone) + daySavings;
if (newtime > 1440)
{
newtime -= 1440;
newjd += 1.0;
}
if (newtime < 0)
{
newtime += 1440;
newjd -= 1.0;
}
sunsetjsd =
timeStringAMPMDate(newtime, newjd);
if(setStr.indexOf("PM")>0){
if(setStr.indexOf(":")==1){
var ajs=parseInt(setStr.substring(0, 1));
ajs+=12;
sunsetjsd=ajs+setStr.substring(1, 4);
}else{
var ajs=parseInt(setStr.substring(0, 2));
ajs+=12;
sunsetjsd=ajs+setStr.substring(1, 4);
}
}
js_sunsetjs_J(sunsetjsd);
// riseSetForm["utcsunset"].value = "prior sunset";
solnoonjs = "N/A";
utcsolnoonjs = "";
}
else
{
alert ("Cannot Find Sunset!");
}
}
}
}
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