Redesigned the Altitude and Azimuth readings to use the Right Ascension and Declination co-ordinates and perform the transformation using the date and site details from the scope. This will correct the problem of the Altitude reading from the handset being incorrect.

2019-05-18 23:50:55 +01:00
parent cf5a6c72fe
commit cf28ecc7c2
9 changed files with 506 additions and 19 deletions
@@ -0,0 +1,149 @@
+using System;
+using ASCOM.Meade.net;
+using NUnit.Framework;
+
+namespace AstroMath.UnitTests
+{
+    [TestFixture]
+    public class AstroMathsUnitTests
+    {
+        private AstroMaths _astroMath;
+
+        [SetUp]
+        public void Setup()
+        {
+            _astroMath = new AstroMaths();
+        }
+
+        [Test]
+        public void DegreesToRadians()
+        {
+            var radians = _astroMath.DegreesToRadians(90);
+            Assert.That(radians, Is.EqualTo(1.5707963267948966));
+        }
+
+        [Test]
+        public void RadiansToDegrees()
+        {
+            var degrees = _astroMath.RadiansToDegrees(1.5707963267948966);
+            Assert.That(degrees, Is.EqualTo(90));
+        }
+
+
+        [Test]
+        public void DateTimeToDecimalHours_book()
+        {
+            DateTime dateTime = new DateTime(2019, 05, 18, 18, 31, 27, DateTimeKind.Utc);
+            var decimalHours = _astroMath.DateTimeToDecimalHours(dateTime);
+
+            Assert.That(decimalHours, Is.EqualTo(18.524166666666666));
+        }
+
+        [Test]
+        public void DateTimeToDecimalHours()
+        {
+            DateTime dateTime = new DateTime(2019, 05, 18, 22, 26, 15, DateTimeKind.Utc);
+            var decimalHours = _astroMath.DateTimeToDecimalHours(dateTime);
+
+            Assert.That(decimalHours, Is.EqualTo(22.4375));
+        }
+
+        [Test]
+        public void UTtoGST_book()
+        {
+            DateTime dateTime = new DateTime(1980, 04, 22, 14, 36, 51, 670, DateTimeKind.Utc);
+            double gst = _astroMath.UTtoGST(dateTime);
+
+            Assert.That(gst, Is.EqualTo(4.667932706211154));
+        }
+
+        [Test]
+        public void UTtoGST()
+        {
+            DateTime dateTime = new DateTime(2019, 05, 18, 22, 26, 15, DateTimeKind.Utc);
+            double gst = _astroMath.UTtoGST(dateTime);
+
+            Assert.That(gst, Is.EqualTo(14.191879687876451));
+        }
+
+        [Test]
+        public void GSTtoLST_book()
+        {
+            double gst = 4.668119;
+            var longitude = -64;
+            var lst = _astroMath.GSTtoLST(gst, longitude);
+            Assert.That(lst, Is.EqualTo(0.4014523333333333));
+        }
+
+        [Test]
+        public void GSTtoLST()
+        {
+            double gst = 14.257589512545053;
+            var longitude = -1.7833333333333332;
+            var lst = _astroMath.GSTtoLST(gst, longitude);
+            Assert.That(lst, Is.EqualTo(14.138700623656163));
+        }
+
+        [Test]
+        public void RightAscensionToHourAngle_book()
+        {
+            DateTime dateTime = new DateTime(1980, 04, 22, 18, 36, 51,670, DateTimeKind.Utc);
+            var longitude = -64;
+            var rightAscension = 18.539166666666667;//18:32'21"
+
+            //var declination = 30.0019444444444
+            var hourAngle = _astroMath.RightAscensionToHourAngle(dateTime, longitude, rightAscension);
+            Assert.That(hourAngle, Is.EqualTo(9.8730510088778161));
+        }
+
+        [Test]
+        public void RightAscensionToHourAngle()
+        {
+            DateTime dateTime = new DateTime(2019, 05, 18, 22, 26, 15, DateTimeKind.Utc);
+            var longitude = -1.7833333333333332;
+            var rightAscension = 4.15361111111111;
+
+            var hourAngle = _astroMath.RightAscensionToHourAngle(dateTime, longitude, rightAscension);
+            Assert.That(hourAngle, Is.EqualTo(9.9193796878764502));
+        }
+
+
+        [Test]
+        public void ConvertEqToHoz_book()
+        {
+            DateTime dateTime = new DateTime(2019, 05, 18, 22, 26, 15, DateTimeKind.Utc);
+            var longitude = -1.7833333333333332;
+            var latitude = 52.0;
+
+            EquatorialCoordinates equatorialCoordinates = new EquatorialCoordinates();
+            equatorialCoordinates.RightAscension = 5.862222222222222;//5 51' 44"
+            equatorialCoordinates.Declination = 23.21944444444444;//23 13' 10"
+
+            //var hourAngle = _astroMath.RightAscensionToHourAngle(dateTime, longitude, equatorialCoordinates.RightAscension);
+            var hourAngle = 5.682222;
+
+            var altAz = _astroMath.ConvertEqToHoz(hourAngle, latitude, equatorialCoordinates);
+
+            Assert.That(altAz.Altitude, Is.EqualTo(20.958562421092779));
+            Assert.That(altAz.Azimuth, Is.EqualTo(281.2728706962269));
+        }
+
+        [Test]
+        public void ConvertEqToHoz()
+        {
+            DateTime dateTime = new DateTime(2019, 05, 18, 22, 26, 15, DateTimeKind.Utc);
+            var longitude = -1.7833333333333332;
+            var latitude = 52.0;
+            EquatorialCoordinates equatorialCoordinates = new EquatorialCoordinates();
+            equatorialCoordinates.RightAscension = 4.15361111111111;
+            equatorialCoordinates.Declination = 30.0019444444444;
+
+            var hourAngle = _astroMath.RightAscensionToHourAngle(dateTime, longitude, equatorialCoordinates.RightAscension);
+            var altaz = _astroMath.ConvertEqToHoz(hourAngle, latitude, equatorialCoordinates);
+
+            Assert.That(altaz.Altitude, Is.EqualTo(-3.5534402923925872));
+            Assert.That(altaz.Azimuth, Is.EqualTo(333.2819484462679));
+        }
+
+    }
+}