public void MagneticVariationCalculationCacheTest()
{
var point1 = new CoordinatePoint(Latitude.FromDegrees(60.12345888), Longitude.FromDegrees(30.12345888));
var watch = Stopwatch.StartNew();
var point1Variation = MagneticVariation.GetMagneticVariation(point1, 6, 0, DateTimeOffset.UtcNow,
MagneticVariation.MagneticVariationModels.WMM2015, out _);
watch.Stop();
var elapsed1 = watch.Elapsed;
point1Variation = MagneticVariation.GetMagneticVariation(point1, 6, 0, DateTimeOffset.UtcNow,
MagneticVariation.MagneticVariationModels.WMM2015, out _);
point1Variation = MagneticVariation.GetMagneticVariation(point1, 6, 0, DateTimeOffset.UtcNow,
MagneticVariation.MagneticVariationModels.WMM2015, out _);
point1Variation = MagneticVariation.GetMagneticVariation(point1, 6, 0, DateTimeOffset.UtcNow,
MagneticVariation.MagneticVariationModels.WMM2015, out _);
watch.Restart();
point1Variation = MagneticVariation.GetMagneticVariation(point1, 6, 0, DateTimeOffset.UtcNow,
MagneticVariation.MagneticVariationModels.WMM2015, out _);
watch.Stop();
var elapsed2 = watch.Elapsed;
// first run takes more time
Assert.IsTrue(elapsed1 > elapsed2);
}
public void GetMagneticVariationTest()
{
var julianDay = new DateTimeOffset(2017, 09, 16, 00, 00, 00, TimeSpan.Zero);
//expected values from windows gui app https://www.ngdc.noaa.gov/geomag/WMM/wmm_gdownload.shtml
var lat1 = 60 * _toRadians;
var lon1 = 30 * _toRadians;
var point1ExpectedDecination = 10.65 * _toRadians;
Assert.AreEqual(point1ExpectedDecination,
MagneticVariation.GetMagneticVariation(lat1, lon1, 0, julianDay, MagneticVariation.MagneticVariationModels.WMM2015, out _), 0.0001d);
var lat2 = -30 * _toRadians;
var lon2 = 130 * _toRadians;
var point2ExpectedDecination = 3.95 * _toRadians;
Assert.AreEqual(point2ExpectedDecination,
MagneticVariation.GetMagneticVariation(lat2, lon2, 0, julianDay, MagneticVariation.MagneticVariationModels.WMM2015, out _), 0.0001d);
var lat3 = 40 * _toRadians;
var lon3 = -70 * _toRadians;
var point3ExpectedDecination = -14.5 * _toRadians;
Assert.AreEqual(point3ExpectedDecination,
MagneticVariation.GetMagneticVariation(lat3, lon3, 0, julianDay, MagneticVariation.MagneticVariationModels.WMM2015, out _), 0.0001d);
var lat4 = -50 * _toRadians;
var lon4 = -170 * _toRadians;
var point4ExpectedDecination = 31.04 * _toRadians;
Assert.AreEqual(point4ExpectedDecination,
MagneticVariation.GetMagneticVariation(lat4, lon4, 0, julianDay, MagneticVariation.MagneticVariationModels.WMM2015, out _), 0.0001d);
}
public static MagneticVariation FromStrings(string deg, string direct)
{
MagneticVariation mv = new MagneticVariation();
//TODO: hack for empty value
if (direct == "")
{
direct = "U";
}
mv.degrees = Util.NullableDouble(deg);
mv.direction = Enum.GetValues(typeof(Direction)).Cast <Direction>().FirstOrDefault(a => (char)a == direct[0]);
return(mv);
}
public GprmcData(string[] sa)
{
head = "GPRMC";
string times = sa[1];
string navWarning = sa[2];
latitude = new Latitude(sa[3], sa[4]);
longitude = new Longitude(sa[5], sa[6]);
speedOverGroundKnots = Convert.ToDouble(sa[7]);
courseMadeGoodDegreesTrue = Convert.ToDouble(sa[8]);
string date = sa[9];
string mode = sa[12];
warning = Enum.GetValues(typeof(NavigationReceiverWarning)).Cast <NavigationReceiverWarning>().FirstOrDefault(a => (char)a == navWarning[0]);
magneticVariation = MagneticVariation.FromStrings(sa[10], sa[11]);
dateTime = Util.DateTimeFromString(date, times);
modeIndicator = Enum.GetValues(typeof(ModeIndicator)).Cast <ModeIndicator>().FirstOrDefault(a => (char)a == mode[0]);
}
public void CoordinatesRoundingAndMagVarCalculationTest()
{
var point1 = new CoordinatePoint(Latitude.FromDegrees(60.12345888), Longitude.FromDegrees(30.12345888));
var point2 = new CoordinatePoint(Latitude.FromDegrees(60.12345666), Longitude.FromDegrees(30.12345666));
var point1Variation = MagneticVariation.GetMagneticVariation(point1, 6, 0, DateTimeOffset.UtcNow,
MagneticVariation.MagneticVariationModels.WMM2015, out _);
var point2Variation = MagneticVariation.GetMagneticVariation(point2, 6, 0, DateTimeOffset.UtcNow,
MagneticVariation.MagneticVariationModels.WMM2015, out _);
Assert.AreNotEqual(point1Variation, point2Variation);
point1Variation = MagneticVariation.GetMagneticVariation(point1, 5, 0, DateTimeOffset.UtcNow,
MagneticVariation.MagneticVariationModels.WMM2015, out _);
point2Variation = MagneticVariation.GetMagneticVariation(point2, 5, 0, DateTimeOffset.UtcNow,
MagneticVariation.MagneticVariationModels.WMM2015, out _);
Assert.AreEqual(point1Variation, point2Variation);
}
public void GetMagneticVariationTest2()
{
// expected values from https://www.ngdc.noaa.gov/geomag/WMM/data/WMM2015/WMM2015_Report.pdf, page 20
var date1 = new DateTimeOffset(2015, 1, 1, 0, 0, 0, 0, TimeSpan.Zero);
var point1 = new CoordinatePoint(Latitude.FromDegrees(80), Longitude.FromDegrees(0));
var point1ExpectedDecination = -3.85 * _toRadians;
Assert.AreEqual(point1ExpectedDecination,
MagneticVariation.GetMagneticVariation(point1, 5, 0, date1, MagneticVariation.MagneticVariationModels.WMM2015
, out _), 0.00002d);
var date2 = new DateTimeOffset(2015, 1, 1, 0, 0, 0, 0, TimeSpan.Zero);
var point2 = new CoordinatePoint(Latitude.FromDegrees(0), Longitude.FromDegrees(120));
var point2ExpectedDecination = 0.57 * _toRadians;
Assert.AreEqual(point2ExpectedDecination,
MagneticVariation.GetMagneticVariation(point2, 5, 0, date2, MagneticVariation.MagneticVariationModels.WMM2015
, out _), 0.00001d);
}
