Merged in develop (pull request #36)

Develop
2021-07-03 12:35:42 +00:00
parent 3d0464f379 faa6ad757e
commit 8e6832ae9f
20 changed files with 1174 additions and 327 deletions
@@ -123,7 +123,8 @@ namespace AstroMath.UnitTests

            var altAz = _astroMath.ConvertEqToHoz(hourAngle, latitude, equatorialCoordinates);

-            Assert.That(altAz.Altitude, Is.EqualTo(20.958562421092779));
+            Assert.That(altAz.Altitude, Is.GreaterThan(20.958562421092770));
+            Assert.That(altAz.Altitude, Is.LessThanOrEqualTo(20.958562421092779));
            Assert.That(altAz.Azimuth, Is.EqualTo(281.2728706962269));
        }

@@ -2,6 +2,7 @@
 using System.Globalization;
 using System.Reflection;
 using ASCOM;
+using ASCOM.Astrometry;
 using ASCOM.Astrometry.AstroUtils;
 using ASCOM.Astrometry.NOVAS;
 using ASCOM.DeviceInterface;
@@ -17,20 +18,23 @@ namespace Meade.net.Telescope.UnitTests
 {
    public class TestProperties
    {
-        internal string telescopeRaResult = "HH:MM:SS";
-        internal double rightAscension = 1.2; //todo rename to declination;
-        internal double declination = 45;
+        internal string telescopeRaResult { get; set; } = "HH:MM:SS";
+        internal double rightAscension { get; set; } = 1.2; //todo rename to declination;
+        internal double declination { get; set; } = 45;

-        internal string SiteLatitudeString = "testLatString";
-        internal double SiteLatitudeValue = 123.45;
+        internal string SiteLatitudeString { get; set; } = "testLatString";
+        internal double SiteLatitudeValue { get; set; } = 123.45;

-        internal string telescopeDate = "10/15/20";
-        internal string telescopeTime = "20:15:10";
-        internal string telescopeUtcCorrection = "-1.0";
+        internal string telescopeDate { get; set; } = "10/15/20";
+        internal string telescopeTime { get; set; } = "20:15:10";
+        internal string telescopeUtcCorrection { get; set; } = "-1.0";

-        internal double hourAngle;
-        internal int telescopeAltitude = 45;
-        internal int telescopeAzimuth = 200;
+        internal double hourAngle { get; set; }
+        internal int telescopeAltitude { get; set; } = 45;
+        internal int telescopeAzimuth { get; set; } = 200;
+
+        internal char[] AlignmentStatus { get; set; }
+        internal string TrackingRate { get; set; }
    }

    [TestFixture]
@@ -99,10 +103,17 @@ namespace Meade.net.Telescope.UnitTests
                SameDevice = 1
            };

-            _sharedResourcesWrapperMock.Setup(x => x.Connect("Serial", It.IsAny<string>(), It.IsAny<ITraceLogger>())).Returns( () => _connectionInfo );
+            _sharedResourcesWrapperMock.Setup(x => x.Connect("Serial", It.IsAny<string>(), It.IsAny<ITraceLogger>())).Returns( () => _connectionInfo);

            _sharedResourcesWrapperMock.Setup(x => x.ReadProfile()).Returns(_profileProperties);

+            _sharedResourcesWrapperMock
+                .SetupProperty(x => x.SideOfPier)
+                .SetupProperty(x => x.TargetRightAscension)
+                .SetupProperty(x => x.TargetDeclination)
+                .SetupProperty(x => x.SlewSettleTime)
+                .SetupProperty(x => x.IsLongFormat);
+
            _astroMathsMock = new Mock<IAstroMaths>();

            _clockMock = new Mock<IClock>();
@@ -113,8 +124,14 @@ namespace Meade.net.Telescope.UnitTests
                _sharedResourcesWrapperMock.Object, _astroMathsMock.Object, _clockMock.Object, _novasMock.Object);
        }

-        private void ConnectTelescope(string productName = TelescopeList.Autostar497, string firmwareVersion = TelescopeList.Autostar497_31Ee)
+        private void ConnectTelescope(string productName = TelescopeList.Autostar497, string firmwareVersion = TelescopeList.Autostar497_31Ee, string alignmentStatus = "GT0")
        {
+            _testProperties.AlignmentStatus = alignmentStatus.ToCharArray();
+
+            _sharedResourcesWrapperMock.Setup(x => x.SendChars("GW", false, 3)).Returns(() => new string(_testProperties.AlignmentStatus));
+            _sharedResourcesWrapperMock.Setup(x => x.SendBlind("AP", false)).Callback(() => _testProperties.AlignmentStatus[1] = 'T');
+            _sharedResourcesWrapperMock.Setup(x => x.SendBlind("AL", false)).Callback(() => _testProperties.AlignmentStatus[1] = 'N');
+
            _sharedResourcesWrapperMock.Setup(x => x.SendString("Gt", false)).Returns( () => _testProperties.SiteLatitudeString);
            _utilMock.Setup(x => x.DMSToDegrees(_testProperties.SiteLatitudeString)).Returns( () => _testProperties.SiteLatitudeValue);

@@ -125,6 +142,12 @@ namespace Meade.net.Telescope.UnitTests
            _sharedResourcesWrapperMock.Setup(x => x.SendString("GL", false)).Returns(() => _testProperties.telescopeTime);
            _sharedResourcesWrapperMock.Setup(x => x.SendString("GG", false)).Returns(() => _testProperties.telescopeUtcCorrection);

+            const string siderealTrackingRate = "+60.1";
+            _testProperties.TrackingRate = siderealTrackingRate;
+            _sharedResourcesWrapperMock.Setup(x => x.SendString("GT", false)).Returns(() => _testProperties.TrackingRate);
+            _sharedResourcesWrapperMock.Setup(x => x.SendBlind("TL", false)).Callback(() => _testProperties.TrackingRate = "lunar");
+            _sharedResourcesWrapperMock.Setup(x => x.SendBlind("TQ", false)).Callback(() => _testProperties.TrackingRate = siderealTrackingRate);
+
            _sharedResourcesWrapperMock.Setup(x => x.ProductName).Returns(() => productName);
            _sharedResourcesWrapperMock.Setup(x => x.FirmwareVersion).Returns(() => firmwareVersion);

@@ -136,6 +159,8 @@ namespace Meade.net.Telescope.UnitTests
            _sharedResourcesWrapperMock.SetupGet(x => x.IsParked).Returns(() => _isParked);
            _sharedResourcesWrapperMock.SetupGet(x => x.ParkedPosition).Returns(() => _parkedPosition);

+            _sharedResourcesWrapperMock.SetupProperty(x => x.IsGuiding);
+
            _astroMathsMock
                .Setup(x => x.ConvertHozToEq(It.IsAny<DateTime>(), It.IsAny<double>(), It.IsAny<double>(),
                    It.IsAny<HorizonCoordinates>())).Returns(() => new EquatorialCoordinates { Declination = _testProperties.declination, RightAscension = _testProperties.rightAscension });
@@ -761,15 +786,17 @@ namespace Meade.net.Telescope.UnitTests
        }


-        [TestCase("A", AlignmentModes.algAltAz)]
-        [TestCase("P", AlignmentModes.algPolar)]
-        [TestCase("G", AlignmentModes.algGermanPolar)]
-        public void AlignmentMode_Get_WhenScopeInAltAz_ReturnsAltAz(string telescopeMode, AlignmentModes alignmentMode)
+        [TestCase("A", AlignmentModes.algAltAz, TelescopeList.Autostar497, TelescopeList.Autostar497_31Ee)]
+        [TestCase("P", AlignmentModes.algPolar, TelescopeList.Autostar497, TelescopeList.Autostar497_31Ee)]
+        [TestCase("A", AlignmentModes.algAltAz, TelescopeList.Autostar497, TelescopeList.Autostar497_43Eg)]
+        [TestCase("P", AlignmentModes.algPolar, TelescopeList.Autostar497, TelescopeList.Autostar497_43Eg)]
+        [TestCase("G", AlignmentModes.algGermanPolar, TelescopeList.Autostar497, TelescopeList.Autostar497_43Eg)]
+        public void AlignmentMode_Get_WhenScopeInAltAz_ReturnsAltAz(string telescopeMode, AlignmentModes alignmentMode, string productName, string firmware)
        {
            const char ack = (char)6;
-            _sharedResourcesWrapperMock.Setup(x => x.SendChar(ack.ToString(), true)).Returns(telescopeMode);
+            _sharedResourcesWrapperMock.Setup(x => x.SendChar(ack.ToString(), false)).Returns(telescopeMode);

-            ConnectTelescope();
+            ConnectTelescope(productName, firmware, $"{telescopeMode}N0");

            var actualResult = _telescope.AlignmentMode;

@@ -996,20 +1023,85 @@ namespace Meade.net.Telescope.UnitTests
            _sharedResourcesWrapperMock.Verify(x => x.SendChar("P", false), Times.AtLeastOnce);
        }

-        [TestCase("High", false, true)]
-        [TestCase("High", true, true)]
-        [TestCase("Low", false, false)]
-        [TestCase("Low", true, false)]
-        public void Precision_Set_WhenSecondConnectionMade_ThenTelescopePrecisionNotChanged(string desiredPresision, bool telescopePrecision, bool finalPrecision)
+        [TestCase("High")]
+        [TestCase("Low")]
+        public void Precision_Set_WhenSecondConnectionMade_ThenTelescopePrecisionNotChanged(string desiredPresision)
        {
+            var isLongFormat = desiredPresision == "High"
+                || (desiredPresision == "Low"
+                        ? false
+                        : throw new ArgumentOutOfRangeException(nameof(desiredPresision), desiredPresision, "Should be High or Low"));
+            _sharedResourcesWrapperMock.SetupProperty(x => x.IsLongFormat, isLongFormat);
+            _sharedResourcesWrapperMock.Setup(x => x.SendString("GR", false)).Returns(() => _testProperties.telescopeRaResult);
+            _utilMock.Setup(x => x.HMSToHours(_testProperties.telescopeRaResult)).Returns(() => _testProperties.rightAscension);
+
            _profileProperties.Precision = desiredPresision;

            _connectionInfo.SameDevice = 2;
            //_connectionInfo.Connections = 2;

+
            _telescope.Connected = true;

            _sharedResourcesWrapperMock.Verify(x => x.SendChar("P", false), Times.Never);
+            _sharedResourcesWrapperMock.Verify(x => x.IsLongFormat, Times.Once);
+        }
+
+        [Test]
+        public void IsLongFormat_WhenHighPrecisionNotSupportedAndSecondConnectionMade_ThenDigitPrecisionValuesArePreserved()
+        {
+            var ra = 12d;
+            var dec = 34d;
+
+            _utilMock.Setup(x => x.HoursToHM(ra, ":", "", 1)).Returns(ra + "HM");
+            _utilMock.Setup(x => x.DegreesToDM(dec, "*", "", 0)).Returns(dec + "DM");
+
+            ConnectTelescope(TelescopeList.LX200CLASSIC);
+
+            _telescope.TargetRightAscension = ra;
+            _telescope.TargetDeclination = dec;
+
+            Assert.That(_connectionInfo.SameDevice, Is.EqualTo(1));
+
+            var secondTelescopeInstance =
+                new ASCOM.Meade.net.Telescope(_utilMock.Object, _utilExtraMock.Object, _astroUtilsMock.Object,
+                    _sharedResourcesWrapperMock.Object, _astroMathsMock.Object, _clockMock.Object, _novasMock.Object);
+
+            Assert.That(secondTelescopeInstance.Connected, Is.False);
+
+            _connectionInfo.SameDevice = 2;
+            secondTelescopeInstance.Connected = true;
+
+            secondTelescopeInstance.TargetRightAscension = ra;
+            secondTelescopeInstance.TargetDeclination = dec;
+
+            _utilMock.Verify(x => x.HoursToHM(ra, ":", "", 1), Times.Exactly(2));
+            _utilMock.Verify(x => x.DegreesToDM(dec, "*", "", 0), Times.Exactly(2));
+            _utilMock.Verify(x => x.HoursToHMS(It.IsAny<double>(), It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string>(), 2), Times.Never);
+            _utilMock.Verify(x => x.DegreesToDMS(It.IsAny<double>(), It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string>(), 2), Times.Never);
+        }
+
+        [TestCase(0)]
+        [TestCase(1)]
+        [TestCase(2)]
+        public void SlewSettleTime_WhenSecondConnectionMade_ThenSlewSettleTimeIsPreserved(short slewSettleTime)
+        {
+            ConnectTelescope();
+
+            _telescope.SlewSettleTime = slewSettleTime;
+
+            Assert.That(_connectionInfo.SameDevice, Is.EqualTo(1));
+
+            var secondTelescopeInstance =
+                new ASCOM.Meade.net.Telescope(_utilMock.Object, _utilExtraMock.Object, _astroUtilsMock.Object,
+                    _sharedResourcesWrapperMock.Object, _astroMathsMock.Object, _clockMock.Object, _novasMock.Object);
+
+            Assert.That(secondTelescopeInstance.Connected, Is.False);
+
+            _connectionInfo.SameDevice = 2;
+            secondTelescopeInstance.Connected = true;
+
+            Assert.That(secondTelescopeInstance.SlewSettleTime, Is.EqualTo(slewSettleTime));
        }

        [Test]
@@ -1036,12 +1128,15 @@ namespace Meade.net.Telescope.UnitTests
            Assert.That(result, Is.False);
        }

-        [Test]
-        public void CanSetTracking_Get_ReturnsTrue()
+        [TestCase(TelescopeList.Autostar497_30Ee, false)]
+        [TestCase(TelescopeList.Autostar497_43Eg, true)]
+        public void CanSetTracking_Get_ReturnsTrueIffGWCommandIsSupported(string firmware, bool supported)
        {
+            ConnectTelescope(firmwareVersion: firmware);
+
            var result = _telescope.CanSetTracking;

-            Assert.That(result, Is.True);
+            Assert.That(result, Is.EqualTo(supported));
        }

        [Test]
@@ -1229,10 +1324,15 @@ namespace Meade.net.Telescope.UnitTests
        public void DestinationSideOfPier_WhenHASiderealTimeDiffIsNotNull_ThenSideOfPierIsCalculated(double ra, double dec, double siderealTime, PierSide expectedDSOP)
        {
            // given
-            // SideralTime uses ConditionRA to normalize to 0..24h, so we use it to mock the property
+
+            // deterministic start
+            _sharedResourcesWrapperMock.Object.SideOfPier = PierSide.pierUnknown;
+
+            // SideralTime uses ConditionRA to normalize to [0..24h), so we use it to mock the property
            _astroUtilsMock.Setup(x => x.ConditionRA(It.IsAny<double>())).Returns(siderealTime);

            var ha = siderealTime - ra;
+            // normalized hour angle range is [-12h..12h]
            var normalisedHA = ha > 12 ? ha - 24 : ha < -12 ? ha + 24 : ha;
            _astroUtilsMock.Setup(x => x.ConditionHA(It.Is<double>(v => v == ha))).Returns(normalisedHA);

@@ -1242,7 +1342,7 @@ namespace Meade.net.Telescope.UnitTests
            var actualDSOP = _telescope.DestinationSideOfPier(ra, dec);

            // then
-            Assert.That(siderealTime, Is.InRange(0, 24 + double.Epsilon));
+            Assert.That(siderealTime, Is.InRange(0, 24));
            Assert.That(normalisedHA, Is.InRange(-12, 12 + double.Epsilon));
            Assert.That(actualDSOP, Is.EqualTo(expectedDSOP));

@@ -1617,6 +1717,9 @@ namespace Meade.net.Telescope.UnitTests
        [TestCase(GuideDirections.guideSouth, TelescopeAxes.axisSecondary)]
        public void PulseGuide_WhenMovingAxisAndPulseGuideAttempted_ThenThrowsExpectedException(GuideDirections direction, TelescopeAxes axes)
        {
+            _sharedResourcesWrapperMock.SetupProperty(x => x.MovingPrimary);
+            _sharedResourcesWrapperMock.SetupProperty(x => x.MovingSecondary);
+            _sharedResourcesWrapperMock.SetupProperty(x => x.EarliestNonSlewingTime, DateTime.MinValue);
            _sharedResourcesWrapperMock.Setup(x => x.SendString("D", false)).Returns("");

            var duration = 0;
@@ -1627,6 +1730,8 @@ namespace Meade.net.Telescope.UnitTests
            var exception = Assert.Throws<InvalidOperationException>(() => _telescope.PulseGuide(direction, duration));

            Assert.That(exception.Message, Is.EqualTo("Unable to PulseGuide while moving same axis."));
+            Assert.That(_sharedResourcesWrapperMock.Object.MovingPrimary, Is.EqualTo(axes == TelescopeAxes.axisPrimary));
+            Assert.That(_sharedResourcesWrapperMock.Object.MovingSecondary, Is.EqualTo(axes == TelescopeAxes.axisSecondary));
        }

        [TestCase(GuideDirections.guideEast)]
@@ -1845,6 +1950,173 @@ namespace Meade.net.Telescope.UnitTests
            Assert.That(excpetion.AccessorSet, Is.True);
        }

+        [TestCase(0, 34, PierSide.pierEast)]
+        [TestCase(12, 34, PierSide.pierEast)]
+        [TestCase(23.4, 34, PierSide.pierWest)]
+        public void SideOfPier_WhenSecondConnectionMade_ThenValueIsPreserved(double ra, double dec, PierSide expectedPierSide)
+        {
+            _sharedResourcesWrapperMock.Setup(x => x.SendChar("MS", false)).Returns("0");
+            _utilMock.Setup(x => x.HMSToHours(null)).Returns(ra);
+            _utilMock.Setup(x => x.DMSToDegrees(null)).Returns(dec);
+            _astroUtilsMock.Setup(x => x.ConditionHA(It.IsAny<double>())).Returns<double>(pHA => pHA < -12 ? pHA + 12 : pHA > 12 ? pHA - 12 : pHA);
+            _astroUtilsMock.Setup(x => x.ConditionRA(It.IsAny<double>())).Returns<double>(pRA => pRA < 0 ? pRA + 24 : pRA >= 24 ? pRA - 24 : pRA);
+
+            ConnectTelescope(firmwareVersion: TelescopeList.Autostar497_43Eg);
+            Assert.That(_connectionInfo.SameDevice, Is.EqualTo(1));
+
+            _telescope.SlewToCoordinates(ra, dec);
+            var sideOfPierAfterSlew = _telescope.SideOfPier;
+
+            Assert.That(sideOfPierAfterSlew, Is.EqualTo(expectedPierSide));
+
+            var secondTelescopeInstance =
+                new ASCOM.Meade.net.Telescope(_utilMock.Object, _utilExtraMock.Object, _astroUtilsMock.Object,
+                    _sharedResourcesWrapperMock.Object, _astroMathsMock.Object, _clockMock.Object, _novasMock.Object);
+
+            Assert.That(secondTelescopeInstance.Connected, Is.False);
+
+            _connectionInfo.SameDevice = 2;
+            secondTelescopeInstance.Connected = true;
+
+            Assert.That(secondTelescopeInstance.SideOfPier, Is.EqualTo(sideOfPierAfterSlew));
+
+            _sharedResourcesWrapperMock.Verify(x => x.SendChar("MS", false), Times.Once);
+            _utilMock.Verify(x => x.HMSToHours(null), Times.Once);
+            _utilMock.Verify(x => x.DMSToDegrees(null), Times.AtLeast(2));
+            _astroUtilsMock.Verify(x => x.ConditionHA(It.IsAny<double>()), Times.Once);
+            _astroUtilsMock.Verify(x => x.ConditionRA(It.IsAny<double>()), Times.Once);
+        }
+
+        delegate void NovasSiderealTimeDelegate(double jdHigh, double jdLow, double jdDelta, GstType gstType, Method method, Accuracy accuracy, ref double sideralTime);
+
+        /// <summary>
+        /// Test cases obtained via .NET telescope simulator
+        /// </summary>
+        [TestCase(9.4337648353882, -76.7178112042103, "2021-06-07T05:23:41.7610000Z", 8.13556526999591, 145.166333333333, 2d, PierSide.pierWest, PierSide.pierEast)]
+        [TestCase(10.1581570159006, 11.8639491368916, "2021-06-07T10:59:19.7000000Z", 9.72726050605156, 145.166333333333, 1d, PierSide.pierWest, PierSide.pierEast)]
+        [TestCase(9.66583199112222, 81.2310578173083, "2021-06-07T11:19:24.5540000Z", 7.73744116673785, 110.285166666667, 2d, PierSide.pierWest, PierSide.pierEast)]
+        [TestCase(8.32978972808615, -29.816491813155, "2021-06-07T11:29:33.7040000Z", 7.90712206850482, 110.285166666667, 1d, PierSide.pierWest, PierSide.pierEast)]
+        [TestCase(1.76405553984887, 60.7756226366989, "2021-06-07T11:34:07.5270000Z", 0.214893775091689, -6.24266666666667, 2d, PierSide.pierWest, PierSide.pierEast)]
+        [TestCase(0.523375885742411, -33.1288722052936, "2021-06-07T11:38:25.1670000Z", 0.286661722506396, -6.24266666666667, 0.5d, PierSide.pierWest, PierSide.pierEast)]
+        public void SideOfPier_WhenTrackingThroughMeridianAfterSubsequentGoto_ThenAMeridianFlipIsPerformed(
+            double ra,
+            double dec,
+            string jnowTimeStr, /* JNOW of object before transit */
+            double jnowSiderealTime,
+            double siteLongitude,
+            double trackingTimeHours,
+            PierSide pierSideBeforeTransit,
+            PierSide pierSideAfterRetargeting
+        )
+        {
+            // given
+            var jnowTime = DateTimeOffset.ParseExact(jnowTimeStr, "o", CultureInfo.InvariantCulture).UtcDateTime;
+            var trackingTimeDiff = TimeSpan.FromHours(trackingTimeHours);
+            var timeAfterTracking = jnowTime + trackingTimeDiff;
+            var raAsHMS = ra + "HMS";
+            var decAsDMS = dec + "DMS";
+            var currentTime = jnowTime;
+
+            _clockMock.Setup(x => x.UtcNow).Returns(() => currentTime);
+
+            _sharedResourcesWrapperMock.Setup(x => x.SendChar("MS", false)).Returns("0");
+
+            // setup for RA
+            _utilMock.Setup(x => x.HoursToHMS(ra, ":", ":", ":", 2)).Returns(raAsHMS);
+            _utilMock.Setup(x => x.HMSToHours(raAsHMS)).Returns(ra);
+
+            // setup for DEC
+            _utilMock.Setup(x => x.DMSToDegrees(decAsDMS)).Returns(dec);
+            _utilMock.Setup(x => x.DegreesToDMS(dec, "*", ":", ":", 2)).Returns(decAsDMS);
+
+            // setup for SiteLongitude
+            var siteLongitudeResult = siteLongitude + "Gg";
+            _sharedResourcesWrapperMock.Setup(x => x.SendString("Gg", false)).Returns(siteLongitudeResult);
+            // remember to invert longitude
+            _utilMock.Setup(x => x.DMSToDegrees(siteLongitudeResult)).Returns(-siteLongitude);
+
+            // setup for SideralTime
+            var siteLongitudeAdj = siteLongitude / 360.0 * 24.0;
+            var jnowSiderealTimeWithoutLongAdj = jnowSiderealTime - siteLongitudeAdj;
+            var afterTrackingSiderealTimeWithoutLongAdj = jnowSiderealTimeWithoutLongAdj + trackingTimeHours;
+
+            _utilMock.Setup(x => x.DateUTCToJulian(It.IsAny<DateTime>())).Returns<DateTime>(pDateTime => pDateTime.Ticks);
+
+            _novasMock
+                .Setup(x => x.SiderealTime(
+                    It.IsAny<double>(),
+                    0d,
+                    0d,
+                    GstType.GreenwichApparentSiderealTime,
+                    Method.EquinoxBased,
+                    Accuracy.Reduced,
+                    ref It.Ref<double>.IsAny))
+                .Callback(new NovasSiderealTimeDelegate(NovasSiderealTime))
+                .Returns(0);
+
+            _astroUtilsMock.Setup(x => x.ConditionRA(It.IsAny<double>())).Returns<double>(pRA => pRA < 0 ? pRA + 24 : pRA >= 24 ? pRA - 24 : pRA);
+
+            void NovasSiderealTime(double pJDHigh, double pJDLow, double pJDDelta, GstType pGSTType, Method pMethod, Accuracy pAccuracy, ref double pSideralTime)
+            {
+                if (pJDHigh == jnowTime.Ticks)
+                {
+                    pSideralTime = jnowSiderealTimeWithoutLongAdj;
+                }
+                else if (pJDHigh == timeAfterTracking.Ticks)
+                {
+                    pSideralTime = afterTrackingSiderealTimeWithoutLongAdj;
+                }
+                else
+                {
+                    Assert.Fail($"No sideral time defined for {pJDHigh}");
+                }
+            }
+
+            // Setup DestinationSideOfPier
+            _astroUtilsMock.Setup(x => x.ConditionHA(It.IsAny<double>())).Returns<double>(pHA => pHA < -12 ? pHA + 12 : pHA > 12 ? pHA - 12 : pHA);
+
+            // Use firmware that supports GW
+            ConnectTelescope(firmwareVersion: TelescopeList.Autostar497_43Eg);
+
+            // when
+            _telescope.SlewToCoordinatesAsync(ra, dec);
+            var actualSideOfPierAfterSlew = _telescope.SideOfPier;
+            // simulate tracking time
+            currentTime += trackingTimeDiff;
+            var actualSideOfPierAfterTracking = _telescope.SideOfPier;
+            _telescope.SlewToTargetAsync();
+            var actualSideOfPierAfterRetargeting = _telescope.SideOfPier;
+
+            // then
+            Assert.That(_telescope.TargetRightAscension, Is.EqualTo(ra));
+            Assert.That(_telescope.TargetDeclination, Is.EqualTo(dec));
+            Assert.That(actualSideOfPierAfterSlew, Is.EqualTo(pierSideBeforeTransit));
+            Assert.That(actualSideOfPierAfterTracking, Is.EqualTo(pierSideBeforeTransit));
+            Assert.That(actualSideOfPierAfterRetargeting, Is.EqualTo(pierSideAfterRetargeting));
+
+            _clockMock.Verify(x => x.UtcNow, Times.AtLeast(2));
+
+            foreach (var time in new[] { jnowTime, timeAfterTracking })
+            {
+                _utilMock.Verify(x => x.DateUTCToJulian(time));
+
+                _novasMock
+                    .Verify(x => x.SiderealTime(
+                        time.Ticks,
+                        0d,
+                        0d,
+                        GstType.GreenwichApparentSiderealTime,
+                        Method.EquinoxBased,
+                        Accuracy.Reduced,
+                        ref It.Ref<double>.IsAny),
+                    Times.Once);
+            }
+
+            _sharedResourcesWrapperMock.Verify(x => x.SendString("Gg", false), Times.Exactly(3));
+            _sharedResourcesWrapperMock.Verify(x => x.SendChar("MS", false), Times.Exactly(2));
+            _sharedResourcesWrapperMock.Verify(x => x.SendString("D", false), Times.Exactly(3));
+        }
+
        [Test]
        public void SiteElevation_Get_WhenNotConnectedThrowsException()
        {
@@ -2229,6 +2501,46 @@ namespace Meade.net.Telescope.UnitTests
            Assert.That(result, Is.EqualTo(declination));
        }

+        [TestCase(-90d)]
+        [TestCase(-45d)]
+        [TestCase(0d)]
+        [TestCase(45d)]
+        [TestCase(90d)]
+        public void TargetDeclination_Set_WhenSecondConnectionMade_ThenValueIsPreserved(double targetDeclination)
+        {
+            var targetDeclinationDMS = targetDeclination + "DMS";
+            var sign = targetDeclination >= 0 ? "+" : string.Empty;
+            var command = $"Sd{sign}{targetDeclinationDMS}";
+
+            _utilMock.Setup(x => x.DegreesToDMS(targetDeclination, "*", ":", ":", 2)).Returns(targetDeclinationDMS);
+            _utilMock.Setup(x => x.DMSToDegrees(targetDeclinationDMS)).Returns(targetDeclination);
+            _sharedResourcesWrapperMock.Setup(x => x.SendChar(command, false)).Returns("1");
+
+            ConnectTelescope();
+            Assert.That(_connectionInfo.SameDevice, Is.EqualTo(1));
+            Assert.That(_sharedResourcesWrapperMock.Object.IsLongFormat, Is.True);
+
+            _telescope.TargetDeclination = targetDeclination;
+
+            Assert.That(_telescope.TargetDeclination, Is.EqualTo(targetDeclination));
+
+            var secondTelescopeInstance =
+                new ASCOM.Meade.net.Telescope(_utilMock.Object, _utilExtraMock.Object, _astroUtilsMock.Object,
+                    _sharedResourcesWrapperMock.Object, _astroMathsMock.Object, _clockMock.Object, _novasMock.Object);
+
+            Assert.That(secondTelescopeInstance.Connected, Is.False);
+
+            _connectionInfo.SameDevice = 2;
+            secondTelescopeInstance.Connected = true;
+
+            Assert.That(_sharedResourcesWrapperMock.Object.IsLongFormat, Is.True);
+            Assert.That(secondTelescopeInstance.TargetDeclination, Is.EqualTo(targetDeclination));
+
+            _utilMock.Verify(x => x.DegreesToDMS(targetDeclination, "*", ":", ":", 2), Times.Once);
+            _utilMock.Verify(x => x.DMSToDegrees(targetDeclinationDMS), Times.Once);
+            _sharedResourcesWrapperMock.Verify(x => x.SendChar(command, false), Times.Once);
+        }
+
        [Test]
        public void TargetRightAscension_Set_WhenNotConnected_ThenThrowsException()
        {
@@ -2311,6 +2623,44 @@ namespace Meade.net.Telescope.UnitTests
            Assert.That(result, Is.EqualTo(rightAscension));
        }

+        [TestCase(0d)]
+        [TestCase(6d)]
+        [TestCase(12d)]
+        [TestCase(23.599d)]
+        public void TargetRightAscension_Set_WhenSecondConnectionMade_ThenValueIsPreserved(double targetRightAscension)
+        {
+            var targetRightAscensionHMS = targetRightAscension + "HMS";
+            var command = $"Sr{targetRightAscensionHMS}";
+
+            _utilMock.Setup(x => x.HoursToHMS(targetRightAscension, ":", ":", ":", 2)).Returns(targetRightAscensionHMS);
+            _utilMock.Setup(x => x.HMSToHours(targetRightAscensionHMS)).Returns(targetRightAscension);
+            _sharedResourcesWrapperMock.Setup(x => x.SendChar(command, false)).Returns("1");
+
+            ConnectTelescope();
+            Assert.That(_connectionInfo.SameDevice, Is.EqualTo(1));
+            Assert.That(_sharedResourcesWrapperMock.Object.IsLongFormat, Is.True);
+
+            _telescope.TargetRightAscension = targetRightAscension;
+
+            Assert.That(_telescope.TargetRightAscension, Is.EqualTo(targetRightAscension));
+
+            var secondTelescopeInstance =
+                new ASCOM.Meade.net.Telescope(_utilMock.Object, _utilExtraMock.Object, _astroUtilsMock.Object,
+                    _sharedResourcesWrapperMock.Object, _astroMathsMock.Object, _clockMock.Object, _novasMock.Object);
+
+            Assert.That(secondTelescopeInstance.Connected, Is.False);
+
+            _connectionInfo.SameDevice = 2;
+            secondTelescopeInstance.Connected = true;
+
+            Assert.That(_sharedResourcesWrapperMock.Object.IsLongFormat, Is.True);
+            Assert.That(secondTelescopeInstance.TargetRightAscension, Is.EqualTo(targetRightAscension));
+
+            _utilMock.Verify(x => x.HoursToHMS(targetRightAscension, ":", ":", ":", 2), Times.Once);
+            _utilMock.Verify(x => x.HMSToHours(targetRightAscensionHMS), Times.Once);
+            _sharedResourcesWrapperMock.Verify(x => x.SendChar(command, false), Times.Once);
+        }
+
        [Test]
        public void Tracking_Get_WhenDefault_ThenIsTrue()
        {
@@ -2319,11 +2669,26 @@ namespace Meade.net.Telescope.UnitTests

        [TestCase(true)]
        [TestCase(false)]
-        public void Tracking_SetAndGet_WhenValueSet_ThenCanGetNewValue(bool tracking)
+        public void Tracking_Set_WhenCanSetTrackingIsFalse_ThenThrowsNotImplementedException(bool tracking)
        {
+            // GW is not supported, so CanSetTracking is false
+            ConnectTelescope(firmwareVersion: TelescopeList.Autostar497_30Ee);
+
+            Assert.Throws<ASCOM.NotImplementedException>( () => { _telescope.Tracking = tracking; } );
+        }
+
+        [TestCase(true, "AP")]
+        [TestCase(false, "AL")]
+        public void Tracking_Set_WhenCanSetTrackingIsTrue_ThenValueIsUpdated(bool tracking, string alignmentCommand)
+        {
+            // GW is supported, so CanSetTracking is true
+            ConnectTelescope(firmwareVersion: TelescopeList.Autostar497_43Eg);
+
            _telescope.Tracking = tracking;

            Assert.That(_telescope.Tracking, Is.EqualTo(tracking));
+
+            _sharedResourcesWrapperMock.Verify(x => x.SendBlind(alignmentCommand, false), Times.Once);
        }

        [Test]
@@ -2341,7 +2706,10 @@ namespace Meade.net.Telescope.UnitTests

            _telescope.TrackingRate = rate;

+            Assert.That(_telescope.TrackingRate, Is.EqualTo(rate));
+
            _sharedResourcesWrapperMock.Verify(x => x.SendBlind(commandString, false), Times.Once);
+            _sharedResourcesWrapperMock.Verify(x => x.SendString("GT", false), Times.Once);
        }

        [Test]
@@ -2595,6 +2963,7 @@ namespace Meade.net.Telescope.UnitTests
        [TestCase(15, 10, "2021-10-03T20:36:00", "2021-10-03T20:36:25", false)]
        public void Slewing_WhenTelescopeIsSlewing_ThenReturnsExpectedValueForSettleTime(short settleTime, short profileSettleTime, string startSlewing, string endSlewing, bool isSlewing)
        {
+            _sharedResourcesWrapperMock.SetupProperty(x => x.EarliestNonSlewingTime, DateTime.MinValue);
            _profileProperties.SettleTime = profileSettleTime;

            var timescalled = 0;
@@ -2644,7 +3013,7 @@ namespace Meade.net.Telescope.UnitTests
        [TestCase(TelescopeList.LX200CLASSIC, "", "[FF][FF][FF][FF][FF][FF][FF][FF][FF][FF][FF][FF][FF][FF]  [FF][FF][FF][FF][FF][FF]", false)]   //The test case below is this same string encoded to return exactly what the telescope will return.
        [TestCase(TelescopeList.LX200CLASSIC, "", "\x00ff\x00ff\x00ff\x00ff\x00ff\x00ff\x00ff\x00ff\x00ff\x00ff\x00ff\x00ff\x00ff\x00ff  \x00ff\x00ff\x00ff\x00ff\x00ff\x00ff", false)]
        [TestCase(TelescopeList.Autostar497, TelescopeList.Autostar497_43Eg, "|", true)]
-        [TestCase(TelescopeList.Autostar497, TelescopeList.Autostar497_43Eg, "\u007f", true)]
+        [TestCase(TelescopeList.Autostar497, TelescopeList.Autostar497_43Eg, "\x007f", true)]
        [TestCase(TelescopeList.Autostar497, TelescopeList.Autostar497_43Eg, "", false)]
        public void Slewing_WhenTelescopeNotSlewing_ThenReturnsFalse(string productName, string firmwareVersion, string response, bool isSlewing)
        {
@@ -2665,6 +3034,10 @@ namespace Meade.net.Telescope.UnitTests
        [TestCase(-1, TelescopeAxes.axisSecondary)]
        public void Slewing_WhenTelescopeIsMoving_ThenDoesNotSendCommandAndReturnsTrue(int rate, TelescopeAxes axis)
        {
+            _sharedResourcesWrapperMock.SetupProperty(x => x.MovingPrimary);
+            _sharedResourcesWrapperMock.SetupProperty(x => x.MovingSecondary);
+            _sharedResourcesWrapperMock.SetupProperty(x => x.EarliestNonSlewingTime, DateTime.MinValue);
+
            ConnectTelescope();

            _telescope.MoveAxis(axis, rate);
@@ -2672,6 +3045,9 @@ namespace Meade.net.Telescope.UnitTests
            var result = _telescope.Slewing;

            Assert.That(result, Is.True);
+            Assert.That(_sharedResourcesWrapperMock.Object.MovingPrimary, Is.EqualTo(axis == TelescopeAxes.axisPrimary));
+            Assert.That(_sharedResourcesWrapperMock.Object.MovingSecondary, Is.EqualTo(axis == TelescopeAxes.axisSecondary));
+
            _sharedResourcesWrapperMock.Verify(x => x.SendString("D", false), Times.Never);
        }

@@ -2691,6 +3067,11 @@ namespace Meade.net.Telescope.UnitTests
        [TestCase(-1, TelescopeAxes.axisSecondary, 10, 20, true, true)]
        public void Slewing_WhenTelescopeStops_ThenWaitsForSettleTime(int rate, TelescopeAxes axis, short profileSettleTime, short driverSettleTime, bool expectedResultInWaitingPeriod, bool afterProfileSettleTimeUp)
        {
+            _sharedResourcesWrapperMock.SetupProperty(x => x.MovingPrimary);
+            _sharedResourcesWrapperMock.SetupProperty(x => x.MovingSecondary);
+            _sharedResourcesWrapperMock.SetupProperty(x => x.SlewSettleTime);
+            _sharedResourcesWrapperMock.SetupProperty(x => x.EarliestNonSlewingTime, DateTime.MinValue);
+
            _profileProperties.SettleTime = profileSettleTime;

            DateTime currentTime = MakeTime("2021-01-23T22:02:10");
@@ -2708,17 +3089,17 @@ namespace Meade.net.Telescope.UnitTests

            _telescope.MoveAxis(axis, 0);

-            currentTime = currentTime + TimeSpan.FromSeconds(profileSettleTime / 2);
+            currentTime += TimeSpan.FromSeconds(profileSettleTime / 2);

            result = _telescope.Slewing;
            Assert.That(result, Is.EqualTo(expectedResultInWaitingPeriod));

-            currentTime = currentTime + TimeSpan.FromSeconds(profileSettleTime / 2);
+            currentTime += TimeSpan.FromSeconds(profileSettleTime / 2);

            result = _telescope.Slewing;
            Assert.That(result, Is.EqualTo(afterProfileSettleTimeUp));

-            currentTime = currentTime + TimeSpan.FromSeconds(driverSettleTime);
+            currentTime += TimeSpan.FromSeconds(driverSettleTime);

            result = _telescope.Slewing;
            Assert.That(result, Is.False);
@@ -2842,9 +3223,6 @@ namespace Meade.net.Telescope.UnitTests
        [Test]
        public void SlewToTarget_WhenSlewing_ThenWaitsForTheSlewToComplete()
        {
-            // avoid calling SideOfPier because it will call Slewing
-            _astroUtilsMock.Setup(x => x.ConditionHA(It.IsAny<double>())).Returns(+1);
-
            _sharedResourcesWrapperMock.Setup(x => x.SendChar("MS", false)).Returns("0");

            var slewCounter = 0;
@@ -2865,7 +3243,6 @@ namespace Meade.net.Telescope.UnitTests
            _telescope.SlewToTarget();

            _utilMock.Verify(x => x.WaitForMilliseconds(It.IsAny<int>()), Times.Exactly(iterations));
-            _astroUtilsMock.Verify(x => x.ConditionHA(It.IsAny<double>()), Times.Once);
        }

        [Test]
@@ -2926,9 +3303,6 @@ namespace Meade.net.Telescope.UnitTests
        [Test]
        public void SlewToCoordinates_WhenCalled_ThenSetsTargetAndSlews()
        {
-            // avoid calling SideOfPier because it will call Slewing
-            _astroUtilsMock.Setup(x => x.ConditionHA(It.IsAny<double>())).Returns(+1);
-
            _testProperties.rightAscension = 1;
            var declination = 2;

@@ -2963,7 +3337,6 @@ namespace Meade.net.Telescope.UnitTests
            _sharedResourcesWrapperMock.Verify(x => x.SendChar("MS", false), Times.Once);

            _utilMock.Verify(x => x.WaitForMilliseconds(It.IsAny<int>()), Times.Exactly(iterations));
-            _astroUtilsMock.Verify(x => x.ConditionHA(It.IsAny<double>()), Times.Once);
        }

        [Test]
@@ -3052,9 +3425,6 @@ namespace Meade.net.Telescope.UnitTests
        [Test]
        public void SlewToAltAz_WhenCalled_ThenSetsTargetAndSlews()
        {
-            // avoid calling SideOfPier because it will call Slewing
-            _astroUtilsMock.Setup(x => x.ConditionHA(It.IsAny<double>())).Returns(+1);
-
            _testProperties.rightAscension = 10.0;
            _testProperties.declination = 20;
            var azimuth = 30;
@@ -3087,7 +3457,6 @@ namespace Meade.net.Telescope.UnitTests
            Assert.That(_telescope.TargetDeclination, Is.EqualTo(_testProperties.declination));
            _sharedResourcesWrapperMock.Verify(x => x.SendChar("MS", false), Times.Once);
            _utilMock.Verify(x => x.WaitForMilliseconds(It.IsAny<int>()), Times.Exactly(iterations));
-            _astroUtilsMock.Verify(x => x.ConditionHA(It.IsAny<double>()), Times.Once);
        }

        [Test]
@@ -0,0 +1,12 @@
+namespace ASCOM.Meade.net
+{
+    public enum Alignment
+    {
+        NeedsAlignment,
+        OneStarAligned,
+        TwoStarAligned,
+        ThreeStarAligned,
+        AlignedOnHome,
+        ScopeWasParked,
+    }
+}
@@ -0,0 +1,11 @@
+using ASCOM.DeviceInterface;
+
+namespace ASCOM.Meade.net
+{
+    public class AlignmentStatus
+    {
+        public AlignmentModes AlignmentMode { get; set; }
+        public bool Tracking { get; set; }
+        public Alignment Status { get; set; }
+    }
+}
@@ -62,7 +62,7 @@
  </PropertyGroup>
  <PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'Release|x86'">
    <OutputPath>..\bin\Release\</OutputPath>
-    <Prefer32Bit>false</Prefer32Bit>
+    <Prefer32Bit>true</Prefer32Bit>
  </PropertyGroup>
  <PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'Debug|x86'">
    <OutputPath>..\bin\Debug\</OutputPath>
@@ -118,6 +118,8 @@
    <Reference Include="System.Xml" />
  </ItemGroup>
  <ItemGroup>
+    <Compile Include="Alignment.cs" />
+    <Compile Include="AlignmentStatus.cs" />
    <Compile Include="AstroMaths\AltitudeData.cs" />
    <Compile Include="AstroMaths\AstroMathExtensions.cs" />
    <Compile Include="AstroMaths\AstroMaths.cs" />
@@ -98,6 +98,10 @@
  <ItemGroup>
    <Compile Include="SharedResourcesUnitTests.cs" />
    <Compile Include="Properties\AssemblyInfo.cs" />
+    <Compile Include="ThreadSafeBoolTests.cs" />
+    <Compile Include="ThreadSafeDateTimeTests.cs" />
+    <Compile Include="ThreadSafeEnumTests.cs" />
+    <Compile Include="ThreadSafeNullableDoubleTests.cs" />
  </ItemGroup>
  <ItemGroup>
    <ProjectReference Include="..\Meade.net\Meade.net.csproj">
@@ -1,6 +1,7 @@

 using System;
 using System.Globalization;
+using ASCOM.DeviceInterface;
 using ASCOM.Meade.net;
 using ASCOM.Meade.net.Wrapper;
 using ASCOM.Utilities.Interfaces;
@@ -29,7 +30,7 @@ namespace Meade.net.UnitTests
        [Test]
        public void CheckThatSerialPortIsSetToUseMock()
        {
-            Assert.That(SharedResources.SharedSerial,Is.EqualTo(_serialMock.Object));
+            Assert.That(SharedResources.SharedSerial, Is.EqualTo(_serialMock.Object));
        }

        [TestCase(true, "Test")]
@@ -618,5 +619,41 @@ namespace Meade.net.UnitTests

            _traceLoggerMock.Verify( x => x.LogIssue("Connect", "Unable to decode response from the telescope, This is likely a hardware serial communications error."), Times.Once);
        }
+
+        [Test]
+        public void CheckIsParkedIsFalseByDefault() => Assert.That(SharedResources.IsParked, Is.False);
+
+        [Test]
+        public void CheckParkedPositionIsNullByDefault() => Assert.That(SharedResources.ParkedPosition, Is.Null);
+
+        [Test]
+        public void CheckIsLongFormatIsFalseByDefault() => Assert.That(SharedResources.IsLongFormat, Is.False);
+
+        [Test]
+        public void CheckMovingPrimaryIsFalseBydefault() => Assert.That(SharedResources.MovingPrimary, Is.False);
+
+        [Test]
+        public void CheckMovingSecondaryIsFalseBydefault() => Assert.That(SharedResources.MovingSecondary, Is.False);
+
+        [Test]
+        public void CheckSideOfPierIsUnknownByDefault() => Assert.That(SharedResources.SideOfPier, Is.EqualTo(PierSide.pierUnknown));
+
+        [Test]
+        public void CheckSlewSettleTimeIsZeroByDefault() => Assert.That(SharedResources.SlewSettleTime, Is.EqualTo((short)0));
+
+        [Test]
+        public void CheckEarliestNonNonSlewingTimeIsMinValueByDefault() => Assert.That(SharedResources.EarliestNonSlewingTime, Is.EqualTo(DateTime.MinValue));
+
+        [Test]
+        public void CheckTargetDeclinationIsNullByDefault() => Assert.That(SharedResources.TargetDeclination.HasValue, Is.False);
+
+        [Test]
+        public void CheckTargetRightAscensionIsNullByDefault() => Assert.That(SharedResources.TargetRightAscension.HasValue, Is.False);
+
+        [Test]
+        public void CheckIsTargetCoordinateInitRequired() => Assert.That(SharedResources.IsTargetCoordinateInitRequired, Is.True);
+
+        [Test]
+        public void CheckIsGuiding() => Assert.That(SharedResources.IsGuiding, Is.False);
    }
 }
@@ -0,0 +1,39 @@
+using ASCOM.Meade.net;
+using NUnit.Framework;
+
+namespace Meade.net.UnitTests
+{
+    public class ThreadSafeBoolTests
+    {
+        [TestCase(false)]
+        [TestCase(true)]
+        public void When_Assigned_ThenValueIsSame(bool value)
+        {
+            // given
+            ThreadSafeValue<bool> sut = value;
+
+            // when
+            bool actual = sut;
+
+            // then
+            Assert.That(actual, Is.EqualTo(value));
+        }
+
+        [TestCase(false, false)]
+        [TestCase(false, true)]
+        [TestCase(true, false)]
+        [TestCase(true, true)]
+        public void When_SetValue_ThenValueIsUpdated(bool initialValue, bool setValue)
+        {
+            // given
+            ThreadSafeValue<bool> sut = initialValue;
+
+            // when
+            sut.Set(setValue);
+            bool afterset = sut;
+
+            // then
+            Assert.That(afterset, Is.EqualTo(setValue));
+        }
+    }
+}
@@ -0,0 +1,61 @@
+using ASCOM.Meade.net;
+using NUnit.Framework;
+using System;
+using System.Collections.Generic;
+using System.Globalization;
+
+namespace Meade.net.UnitTests
+{
+    public class ThreadSafeDateTimeTests
+    {
+        [TestCaseSource(nameof(DateTimeSource))]
+        public void When_Assigned_ThenValueIsSame(DateTime value)
+        {
+            // given
+            ThreadSafeValue<DateTime> sut = value;
+
+            // when
+            DateTime actual = sut;
+
+            // then
+            Assert.That(actual, Is.EqualTo(value));
+        }
+
+        [TestCaseSource(nameof(DateTimeSetSource))]
+        public void When_SetValue_ThenValueIsUpdated(DateTime initialValue, DateTime setValue)
+        {
+            // given
+            ThreadSafeValue<DateTime> sut = initialValue;
+
+            // when
+            sut.Set(setValue);
+            DateTime afterset = sut;
+
+            // then
+            Assert.That(afterset, Is.EqualTo(setValue));
+        }
+
+        static readonly DateTime Example1 = DateTimeOffset.Parse("2012-05-09T02:10:31.296761Z", CultureInfo.InvariantCulture).UtcDateTime;
+        static readonly DateTime Example2 = DateTimeOffset.Parse("2051-03-09T23:15:11.556081Z", CultureInfo.InvariantCulture).UtcDateTime;
+
+        static IEnumerable<DateTime> DateTimeSource => new[]
+        {
+            DateTime.MinValue,
+            Example1,
+            Example2
+        };
+
+        static IEnumerable<TestCaseData> DateTimeSetSource => new[]
+        {
+            new TestCaseData(DateTime.MinValue, Example1),
+            new TestCaseData(DateTime.MinValue, Example2),
+            new TestCaseData(DateTime.MinValue, DateTime.MinValue),
+            new TestCaseData(Example1, Example1),
+            new TestCaseData(Example1, Example2),
+            new TestCaseData(Example1, DateTime.MinValue),
+            new TestCaseData(Example2, Example1),
+            new TestCaseData(Example2, Example2),
+            new TestCaseData(Example2, DateTime.MinValue)
+        };
+    }
+}
@@ -0,0 +1,46 @@
+using ASCOM.DeviceInterface;
+using ASCOM.Meade.net;
+using NUnit.Framework;
+
+namespace Meade.net.UnitTests
+{
+    public class ThreadSafeEnumTests
+    {
+        [TestCase(PierSide.pierUnknown)]
+        [TestCase(PierSide.pierEast)]
+        [TestCase(PierSide.pierWest)]
+        public void When_Assigned_ThenValueIsSame(PierSide value)
+        {
+            // given
+            ThreadSafeValue<PierSide> sut = value;
+
+            // when
+            PierSide actual = sut;
+
+            // then
+            Assert.That(actual, Is.EqualTo(value));
+        }
+
+        [TestCase(PierSide.pierUnknown, PierSide.pierUnknown)]
+        [TestCase(PierSide.pierUnknown, PierSide.pierEast)]
+        [TestCase(PierSide.pierUnknown, PierSide.pierWest)]
+        [TestCase(PierSide.pierEast, PierSide.pierUnknown)]
+        [TestCase(PierSide.pierEast, PierSide.pierEast)]
+        [TestCase(PierSide.pierEast, PierSide.pierWest)]
+        [TestCase(PierSide.pierWest, PierSide.pierUnknown)]
+        [TestCase(PierSide.pierWest, PierSide.pierEast)]
+        [TestCase(PierSide.pierWest, PierSide.pierWest)]
+        public void When_SetValue_ThenValueIsUpdated(PierSide initialValue, PierSide setValue)
+        {
+            // given
+            ThreadSafeValue<PierSide> sut = initialValue;
+
+            // when
+            sut.Set(setValue);
+            PierSide afterset = sut;
+
+            // then
+            Assert.That(afterset, Is.EqualTo(setValue));
+        }
+    }
+}
@@ -0,0 +1,45 @@
+using ASCOM.Meade.net;
+using NUnit.Framework;
+
+namespace Meade.net.UnitTests
+{
+    public class ThreadSafeNullableDoubleTests
+    {
+        [TestCase(0.1d)]
+        [TestCase(-12.34d)]
+        [TestCase(0d)]
+        [TestCase(null)]
+        public void When_Assigned_ThenValueIsSame(double? value)
+        {
+            // given
+            ThreadSafeValue<double?> sut = value;
+
+            // when
+            double? actual = sut;
+
+            // then
+            Assert.That(actual, Is.EqualTo(value));
+        }
+
+        [TestCase(0.1d, 0.2d)]
+        [TestCase(-12.34d, 5d)]
+        [TestCase(0d, 1d)]
+        [TestCase(null, 2d)]
+        [TestCase(0.1d, null)]
+        [TestCase(-12.34d, null)]
+        [TestCase(0d, null)]
+        [TestCase(null, null)]
+        public void When_SetValue_ThenValueIsUpdated(double? initialValue, double? setValue)
+        {
+            // given
+            ThreadSafeValue<double?> sut = initialValue;
+
+            // when
+            sut.Set(setValue);
+            double? afterset = sut;
+
+            // then
+            Assert.That(afterset, Is.EqualTo(setValue));
+        }
+    }
+}
@@ -5,6 +5,7 @@
  <package id="JetBrains.Annotations" version="2020.3.0" targetFramework="net472" />
  <package id="Moq" version="4.15.2" targetFramework="net472" />
  <package id="NUnit" version="3.13.0" targetFramework="net472" />
+  <package id="NUnit.ConsoleRunner" version="3.12.0" targetFramework="net472" />
  <package id="System.Runtime.CompilerServices.Unsafe" version="5.0.0" targetFramework="net472" />
  <package id="System.Threading.Tasks.Extensions" version="4.5.4" targetFramework="net472" />
 </packages>
@@ -343,9 +343,9 @@ namespace ASCOM.Meade.net
            //:FS# Set Focus speed to slowest setting
            //Returns: Nothing

-            //:F<n># Autostar, Autostar II – set focuser speed to <n> where <n> is an ASCII digit 1..4
+            //:F<n># Autostar, Autostar II - set focuser speed to <n> where <n> is an ASCII digit 1..4
            //Returns: Nothing
-            //All others – Not Supported
+            //All others - Not Supported
            _utilities.WaitForMilliseconds(100);

            PerformFocuserMove(directionOut);
@@ -146,6 +146,7 @@
    <Compile Include="ProfileProperties.cs" />
    <Compile Include="Properties\AssemblyInfo.cs" />
    <Compile Include="TelescopeList.cs" />
+    <Compile Include="ThreadSafeValue.cs" />
    <Compile Include="Win32Utilities.cs" />
    <Compile Include="Wrapper\IProfileWrapper.cs" />
    <Compile Include="Wrapper\SharedResourcesWrapper.cs" />
@@ -6,5 +6,7 @@ namespace ASCOM.Meade.net
        public double Azimuth { get; set; }
        public double RightAscension { get; set; }
        public double Declination { get; set; }
+        public double SiteLongitude { get; set; }
+        public double SiteLatitude { get; set; }
    }
 }
@@ -19,7 +19,9 @@ using System.Collections.Generic;
 using System.Globalization;
 using System.Runtime.InteropServices;
 using System.Security.AccessControl;
+using System.Threading;
 using System.Windows.Forms;
+using ASCOM.DeviceInterface;
 using ASCOM.Meade.net.Wrapper;
 using ASCOM.Utilities;
 using ASCOM.Utilities.Interfaces;
@@ -73,7 +75,7 @@ namespace ASCOM.Meade.net

        public static IProfileFactory ProfileFactory
        {
-            get => _profileFactory ?? ( _profileFactory = new ProfileFactory());
+            get => _profileFactory ?? (_profileFactory = new ProfileFactory());
            set => _profileFactory = value;
        }

@@ -122,13 +124,17 @@ namespace ASCOM.Meade.net

        public static bool SendBool(string command, bool raw = false)
        {
-        
            var result = SendChar(command, raw);

            return result == "1";
        }

        public static string SendChar(string command, bool raw = false)
+        {
+            return SendChars(command, raw, count: 1);
+        }
+
+        public static string SendChars(string command, bool raw = false, int count = 1)
        {
            lock (LockObject)
            {
@@ -139,14 +145,11 @@ namespace ASCOM.Meade.net

                try
                {
-                    return SharedSerial.ReceiveCounted(1);
+                    return SharedSerial.ReceiveCounted(count);
                }
-                catch (COMException ex)
+                catch (COMException ex) when (ex.Message.Contains("Timed out waiting for received data"))
                {
-                    if (ex.Message.Contains("Timed out waiting for received data"))
                    throw new TimeoutException(ex.Message, ex);
-
-                    throw;
                }
            }
        }
@@ -244,7 +247,7 @@ namespace ASCOM.Meade.net
        private const string HandShakeDefault = "None";
        private const string ParityDefault = "None";
        private const string SendDateTimeDefault = "false";
-        private static string ParkedBehaviourDefault = "No Coordinates";
+        private const string ParkedBehaviourDefault = "No Coordinates";
        private const string ParkedAltDefault = "0";
        private const string ParkedAzimuthDefault = "180";

@@ -334,7 +337,7 @@ namespace ASCOM.Meade.net
        private static readonly Dictionary<string, DeviceHardware> ConnectedDevices = new Dictionary<string, DeviceHardware>();

        private static readonly Dictionary<string, DeviceHardware> ConnectedDeviceIds = new Dictionary<string, DeviceHardware>();
-        private static IProfileFactory _profileFactory ;
+        private static IProfileFactory _profileFactory;


        /// <summary>
@@ -363,7 +366,7 @@ namespace ASCOM.Meade.net
                        SharedSerial.DTREnable = profileProperties.RtsDtrEnabled;
                        SharedSerial.RTSEnable = profileProperties.RtsDtrEnabled;
                        SharedSerial.DataBits = profileProperties.DataBits;
-                        SharedSerial.StopBits = (SerialStopBits)Enum.Parse(typeof(SerialStopBits), profileProperties.StopBits );
+                        SharedSerial.StopBits = (SerialStopBits)Enum.Parse(typeof(SerialStopBits), profileProperties.StopBits);
                        SharedSerial.Parity = (SerialParity)Enum.Parse(typeof(SerialParity), profileProperties.Parity);
                        SharedSerial.Speed = (SerialSpeed)profileProperties.Speed;
                        SharedSerial.Handshake = (SerialHandshake)Enum.Parse(typeof(SerialHandshake), profileProperties.Handshake);
@@ -500,8 +503,92 @@ namespace ASCOM.Meade.net
            ParkedPosition = parkedPosition;
        }

-        public static bool IsParked { get; private set; }
+        private static readonly ThreadSafeValue<bool> _isParked = false;
+        public static bool IsParked
+        {
+            get => _isParked;
+            private set => _isParked.Set(value);
+        }

-        public static ParkedPosition ParkedPosition { get; private set; }
+        private static ParkedPosition _parkedPosition;
+        public static ParkedPosition ParkedPosition
+        {
+            get => _parkedPosition;
+            private set => Interlocked.Exchange(ref _parkedPosition, value);
+        }
+
+        private static readonly ThreadSafeValue<PierSide> _sideOfPier = PierSide.pierUnknown;
+        /// <summary>
+        /// Start with <see cref="PierSide.pierUnknown"/>.
+        /// As we do not know the physical declination axis position, we have to keep track manually.
+        /// </summary>
+        public static PierSide SideOfPier
+        {
+            get => _sideOfPier;
+            internal set => _sideOfPier.Set(value);
+        }
+
+        private static readonly ThreadSafeValue<double?> _targetRightAscension = null as double?;
+        public static double? TargetRightAscension
+        {
+            get => _targetRightAscension;
+            internal set => _targetRightAscension.Set(value);
+        }
+
+        private static readonly ThreadSafeValue<double?> _targetDeclination = null as double?;
+        public static double? TargetDeclination
+        {
+            get => _targetDeclination;
+            internal set => _targetDeclination.Set(value);
+        }
+
+        private static int _slewSettleTime;
+        public static short SlewSettleTime
+        {
+            get => Convert.ToInt16(_slewSettleTime);
+            internal set => Interlocked.Exchange(ref _slewSettleTime, value);
+        }
+
+        private static readonly ThreadSafeValue<bool> _isLongFormat = false;
+        public static bool IsLongFormat
+        {
+            get => _isLongFormat;
+            internal set => _isLongFormat.Set(value);
+        }
+
+        private static readonly ThreadSafeValue<bool> _movingPrimary = false;
+        public static bool MovingPrimary
+        {
+            get => _movingPrimary;
+            internal set => _movingPrimary.Set(value);
+        }
+
+        private static readonly ThreadSafeValue<bool> _movingSecondary = false;
+        public static bool MovingSecondary
+        {
+            get => _movingSecondary;
+            internal set => _movingSecondary.Set(value);
+        }
+
+        private static readonly ThreadSafeValue<DateTime> _earliestNonSlewingTime = DateTime.MinValue;
+        public static DateTime EarliestNonSlewingTime
+        {
+            get => _earliestNonSlewingTime;
+            internal set => _earliestNonSlewingTime.Set(value);
+        }
+
+        private static readonly ThreadSafeValue<bool> _isTargetCoordinateInitRequired = true;
+        public static bool IsTargetCoordinateInitRequired
+        {
+            get => _isTargetCoordinateInitRequired;
+            internal set => _isTargetCoordinateInitRequired.Set(value);
+        }
+
+        private static readonly ThreadSafeValue<bool> _isGuiding = false;
+        public static bool IsGuiding
+        {
+            get => _isGuiding;
+            internal set => _isGuiding.Set(value);
+        }
    }
 }
@@ -0,0 +1,18 @@
+using JetBrains.Annotations;
+using System.Threading;
+
+namespace ASCOM.Meade.net
+{
+    public class ThreadSafeValue<T>
+    {
+        private object _value;
+
+        public ThreadSafeValue(in T value) => _value = value;
+
+        public void Set(in T value) => Interlocked.Exchange(ref _value, value);
+
+        public static implicit operator ThreadSafeValue<T>(in T value) => new ThreadSafeValue<T>(value);
+
+        public static implicit operator T([NotNull] ThreadSafeValue<T> @this) => (T)(@this?._value ?? default);
+    }
+}
@@ -1,4 +1,5 @@
 using System;
+using ASCOM.DeviceInterface;
 using ASCOM.Utilities.Interfaces;

 namespace ASCOM.Meade.net.Wrapper
@@ -19,6 +20,7 @@ namespace ASCOM.Meade.net.Wrapper
        void SendBlind(string message, bool raw = false);
        bool SendBool(string command, bool raw = false);
        string SendChar(string message, bool raw = false);
+        string SendChars(string message, bool raw = false, int count = 1);

        string ReadTerminated();

@@ -31,6 +33,24 @@ namespace ASCOM.Meade.net.Wrapper
        void SetParked(bool atPark, ParkedPosition parkedPosition);
        bool IsParked { get; }
        ParkedPosition ParkedPosition { get; }
+
+        PierSide SideOfPier { get; set; }
+        double? TargetRightAscension { get; set; }
+        double? TargetDeclination { get; set; }
+
+        short SlewSettleTime { get; set; }
+
+        bool IsLongFormat { get; set; }
+
+        bool MovingPrimary { get; set; }
+
+        bool MovingSecondary { get; set; }
+
+        DateTime EarliestNonSlewingTime { get; set; }
+
+        bool IsTargetCoordinateInitRequired { get; set; }
+
+        bool IsGuiding { get; set; }
    }

    public class SharedResourcesWrapper : ISharedResourcesWrapper
@@ -74,11 +94,16 @@ namespace ASCOM.Meade.net.Wrapper
            return SharedResources.SendBool(command, raw);
        }

-        public string SendChar(string message,bool raw = false)
+        public string SendChar(string message, bool raw = false)
        {
            return SharedResources.SendChar(message, raw);
        }

+        public string SendChars(string message, bool raw = false, int count = 1)
+        {
+            return SharedResources.SendChars(message, raw, count);
+        }
+
        public string ReadTerminated()
        {
            return SharedResources.ReadTerminated();
@@ -112,5 +137,65 @@ namespace ASCOM.Meade.net.Wrapper
        public bool IsParked => SharedResources.IsParked;

        public ParkedPosition ParkedPosition => SharedResources.ParkedPosition;
+
+        public PierSide SideOfPier
+        {
+            get => SharedResources.SideOfPier;
+            set => SharedResources.SideOfPier = value;
+        }
+
+        public double? TargetRightAscension
+        {
+            get => SharedResources.TargetRightAscension;
+            set => SharedResources.TargetRightAscension = value;
+        }
+
+        public double? TargetDeclination
+        {
+            get => SharedResources.TargetDeclination;
+            set => SharedResources.TargetDeclination = value;
+        }
+
+        public short SlewSettleTime
+        {
+            get => SharedResources.SlewSettleTime;
+            set => SharedResources.SlewSettleTime = value;
+        }
+
+        public bool IsLongFormat
+        {
+            get => SharedResources.IsLongFormat;
+            set => SharedResources.IsLongFormat = value;
+        }
+
+        public bool MovingPrimary
+        {
+            get => SharedResources.MovingPrimary;
+            set => SharedResources.MovingPrimary = value;
+        }
+
+        public bool MovingSecondary
+        {
+            get => SharedResources.MovingSecondary;
+            set => SharedResources.MovingSecondary = value;
+        }
+
+        public DateTime EarliestNonSlewingTime
+        {
+            get => SharedResources.EarliestNonSlewingTime;
+            set => SharedResources.EarliestNonSlewingTime = value;
+        }
+
+        public bool IsTargetCoordinateInitRequired
+        {
+            get => SharedResources.IsTargetCoordinateInitRequired;
+            set => SharedResources.IsTargetCoordinateInitRequired = value;
+        }
+
+        public bool IsGuiding
+        {
+            get => SharedResources.IsGuiding;
+            set => SharedResources.IsGuiding = value;
+        }
    }
 }