public void Test_CalculateSolarPosition_TooHighDeltaT_ShouldThrowException()
{
var data = new SunData(
observationTime: new DateTime(2003, 10, 17, 12, 30, 30),
timezone: -7,
deltaUT1: 0,
deltaT: 67000,
latitude: 39.742476,
longitude: -105.1786,
elevation: 1830.14,
temperature: 11,
pressure: 820,
refraction: null);
SunPositionCalculator.CalculateSunPosition(data);
}
public void Test_PartOfDayChecker_ForFullDay_ShouldReturnCorrectResults()
{
for (DateTime observationTime = new DateTime(2016, 6, 28); observationTime <= new DateTime(2016, 6, 29); observationTime = observationTime.AddMinutes(10))
{
var data = new SunData(
observationTime: observationTime,
timezone: 3,
deltaUT1: 0,
deltaT: 67,
latitude: 42.72275253,
longitude: 23.2992956,
elevation: 540,
temperature: 10,
pressure: 940,
refraction: null);
SunPositionCalculator.CalculateSunPosition(data);
var zenithAngle = data.TopocentricZenithAngle;
var azimuth = data.AstronomicalTopocentricAzimuth;
var twilightZenithAngle = 90 + PartOfDayChecker.TwilightElevation;
var partOfDay = PartOfDayChecker.GetPartOfDay(observationTime, new TimeSpan(3, 0, 0), 42.72275253, 23.2992956);
// Sanity checks
Assert.IsTrue(zenithAngle >= 0 && zenithAngle <= 180);
Assert.IsTrue(azimuth >= 0 && azimuth <= 360);
if (partOfDay == PartOfDay.Night)
{
Assert.IsTrue(zenithAngle >= twilightZenithAngle);
}
else if (partOfDay == PartOfDay.Dawn)
{
Assert.IsTrue(zenithAngle > 90 && zenithAngle < twilightZenithAngle);
Assert.IsTrue(azimuth > 180);
}
else if (partOfDay == PartOfDay.Day)
{
Assert.IsTrue(zenithAngle < 90);
}
else if (partOfDay == PartOfDay.Dusk)
{
Assert.IsTrue(zenithAngle > 90 && zenithAngle < twilightZenithAngle);
Assert.IsTrue(azimuth <= 180);
}
}
}
public void Test_CalculateSolarPosition_ShouldCalculateIntermediateValuesCorrectly()
{
var data = new SunData(
observationTime: new DateTime(2003, 10, 17, 12, 30, 30),
timezone: -7,
deltaUT1: 0,
deltaT: 67,
latitude: 39.742476,
longitude: -105.1786,
elevation: 1830.14,
temperature: 11,
pressure: 820,
refraction: null);
SunPositionCalculator.CalculateSunPosition(data);
Assert.AreEqual(data.JulianDay, 2452930.312847, 5e-7);
Assert.AreEqual(data.EarthHeliocentricLongitude, 24.0182616917, DefaultAccuracy);
Assert.AreEqual(data.EarthHeliocentricLatitude, -0.0001011219, DefaultAccuracy);
Assert.AreEqual(data.EarthRadiusVector, 0.9965422974, DefaultAccuracy);
Assert.AreEqual(data.GeocentricLongitude, 204.0182616917, DefaultAccuracy);
Assert.AreEqual(data.GeocentricLatitude, 0.0001011219, DefaultAccuracy);
Assert.AreEqual(data.LongitudeNutation, -0.00399840, 5e-9);
Assert.AreEqual(data.ObliquityNutation, 0.00166657, 5e-9);
Assert.AreEqual(data.TrueEclipticObliquity, 23.440465, 5e-7);
Assert.AreEqual(data.ApparentSunLongitude, 204.0085519281, DefaultAccuracy);
Assert.AreEqual(data.SunRightAscension, 202.22741, 5e-6);
Assert.AreEqual(data.SunDeclination, -9.31434, 5e-6);
Assert.AreEqual(data.ObserverHourAngle, 11.105900, 5e-5);
Assert.AreEqual(data.TopocentricLocalHourAngle, 11.10629, 5e-5);
Assert.AreEqual(data.TopocentricSunRightAscension, 202.22704, 5e-6);
Assert.AreEqual(data.TopocentricSunDeclination, -9.316179, 5e-7);
Assert.AreEqual(data.TopocentricZenithAngle, 50.11162, 5e-6);
Assert.AreEqual(data.TopocentricAzimuth, 194.34024, 5e-6);
}
public void Test_CalculateSolarPosition_NEQuadrantDawn()
{
// Moscow
var data = new SunData(
observationTime: new DateTime(2016, 6, 10, 3, 0, 0),
timezone: 4,
deltaUT1: 0,
deltaT: 67,
latitude: 55.7558,
longitude: 37.6173,
elevation: 151,
temperature: 5.8,
pressure: 1013.25,
refraction: null);
SunPositionCalculator.CalculateSunPosition(data);
Assert.AreEqual(data.TopocentricZenithAngle, 98.879283, 5e-6);
Assert.AreEqual(data.TopocentricAzimuth, 21.124674, 5e-5);
}
public void Test_CalculateSolarPosition_SouthernCircumpolarRegion()
{
// Antarctica
var data = new SunData(
observationTime: new DateTime(2016, 6, 10, 12, 30, 0),
timezone: 8,
deltaUT1: 0,
deltaT: 67,
latitude: -76.566667,
longitude: 110.2,
elevation: 2500,
temperature: -45,
pressure: 1013.25,
refraction: null);
SunPositionCalculator.CalculateSunPosition(data);
Assert.AreEqual(data.TopocentricZenithAngle, 99.615244, 5e-6);
Assert.AreEqual(data.TopocentricAzimuth, 2.023090, 5e-5);
}
public void Test_CalculateSolarPosition_NorthernCircumpolarRegion()
{
// Longyearbyen
var data = new SunData(
observationTime: new DateTime(2016, 6, 10, 12, 30, 0),
timezone: 1,
deltaUT1: 0,
deltaT: 67,
latitude: 78.2232,
longitude: 15.6267,
elevation: 100,
temperature: -5.8,
pressure: 1013.25,
refraction: null);
SunPositionCalculator.CalculateSunPosition(data);
Assert.AreEqual(data.TopocentricZenithAngle, 55.276166, 5e-6);
Assert.AreEqual(data.TopocentricAzimuth, 189.234844, 5e-5);
}
public void Test_CalculateSolarPosition_SWQuadrant()
{
// Sao Paulo
var data = new SunData(
observationTime: new DateTime(2016, 6, 10, 12, 30, 0),
timezone: -3,
deltaUT1: 0,
deltaT: 67,
latitude: -23.5505,
longitude: -46.6333,
elevation: 760,
temperature: 22.5,
pressure: 1013.25,
refraction: null);
SunPositionCalculator.CalculateSunPosition(data);
Assert.AreEqual(data.TopocentricZenithAngle, 46.965500, 5e-6);
Assert.AreEqual(data.TopocentricAzimuth, 352.472097, 5e-5);
}
public void Test_CalculateSolarPosition_SEQuadrant()
{
// Perth
var data = new SunData(
observationTime: new DateTime(2016, 6, 10, 12, 30, 0),
timezone: 8,
deltaUT1: 0,
deltaT: 67,
latitude: -31.9505,
longitude: 115.8605,
elevation: 31.5,
temperature: 17.8,
pressure: 1013.25,
refraction: null);
SunPositionCalculator.CalculateSunPosition(data);
Assert.AreEqual(data.TopocentricZenithAngle, 55.067639, 5e-6);
Assert.AreEqual(data.TopocentricAzimuth, 356.079664, 5e-5);
}
public void Test_CalculateSolarPosition_NWQuadrant()
{
// Chicago
var data = new SunData(
observationTime: new DateTime(2016, 6, 10, 12, 30, 0),
timezone: -5,
deltaUT1: 0,
deltaT: 67,
latitude: 41.8781,
longitude: -87.6298,
elevation: 181,
temperature: 9.8,
pressure: 1013.25,
refraction: null);
SunPositionCalculator.CalculateSunPosition(data);
Assert.AreEqual(data.TopocentricZenithAngle, 19.259226, 5e-6);
Assert.AreEqual(data.TopocentricAzimuth, 165.863616, 5e-5);
}