Impemented the code changes to return co-ordinated when the telescope is parked.

Also added loads of checks for if the telescope is parked.

AstroMath.UnitTests/AstroMath.UnitTests.csproj

@@ -90,6 +90,10 @@
       <Project>{64308775-bd4a-469c-bcab-3ed830b811af}</Project>
       <Name>Meade.net.Telescope</Name>
     </ProjectReference>
+    <ProjectReference Include="..\Meade.net\Meade.net.csproj">
+      <Project>{3689a2cb-94c5-4012-a5cf-7e7d1dd27143}</Project>
+      <Name>Meade.net</Name>
+    </ProjectReference>
   </ItemGroup>
   <ItemGroup>
     <None Include="app.config" />

Meade.net.Telescope/Meade.net.Telescope.csproj

@@ -122,7 +122,6 @@
     <Compile Include="AstroMaths\AstroMathExtensions.cs" />
     <Compile Include="AstroMaths\AstroMaths.cs" />
     <Compile Include="AstroMaths\EquatorialCoordinates.cs" />
-    <Compile Include="AstroMaths\HorizonCoordinates.cs" />
     <Compile Include="AstroMaths\IAstroMaths.cs" />
     <Compile Include="Clock.cs" />
     <Compile Include="ComparisonResult.cs" />

Meade.net.Telescope/Telescope.cs

@@ -878,6 +878,7 @@ namespace ASCOM.Meade.net
         public void AbortSlew()
         {
             CheckConnected("AbortSlew");
+            CheckParked();
 
             LogMessage("AbortSlew", "Aborting slew");
             SharedResourcesWrapper.SendBlind(":Q#");
@@ -889,6 +890,12 @@ namespace ASCOM.Meade.net
             SetSlewingMinEndTime();
         }
 
+        private void CheckParked()
+        {
+            if (AtPark)
+                throw new ParkedException("Telescope is parked");
+        }
+
         public AlignmentModes AlignmentMode
         {
             get
@@ -1247,11 +1254,16 @@ namespace ASCOM.Meade.net
             }
         }
 
+        private double _lastGoodDeclination;
+
         public double Declination
         {
             get
             {
                 CheckConnected("Declination Get");
+                try
+                {
+                    CheckParked();
 
                     var result = SharedResourcesWrapper.SendString(":GD#");
                     //:GD# Get Telescope Declination.
@@ -1261,8 +1273,23 @@ namespace ASCOM.Meade.net
                     double declination = _utilities.DMSToDegrees(result);
 
                     LogMessage("Declination", $"Get - {result} convert to {declination} {_utilitiesExtra.DegreesToDMS(declination, ":", ":")}");
+                    _lastGoodDeclination = declination;
                     return declination;
                 }
+                catch (ParkedException)
+                {
+                    switch (ParkedBehaviour)
+                    {
+                        case ParkedBehaviour.LastGoodPosition:
+                            return _lastGoodDeclination;
+                        case ParkedBehaviour.ReportCoordinates:
+                            var raDec = _astroMaths.ConvertHozToEq(UTCDate, SiteLatitude, SiteLongitude, ParkedAltAz);
+                            return raDec.Declination;
+                        default:
+                            throw;
+                    }
+                }
+            }
         }
 
         public double DeclinationRate
@@ -1413,6 +1440,7 @@ namespace ASCOM.Meade.net
         {
             LogMessage("MoveAxis", $"Axis={axis} rate={rate}");
             CheckConnected("MoveAxis");
+            CheckParked();
 
             var absRate = Math.Abs(rate);
 
@@ -1535,6 +1563,7 @@ namespace ASCOM.Meade.net
             try
             {
                 CheckConnected("PulseGuide");
+                CheckParked();
                 if (IsSlewingToTarget())
                     throw new InvalidOperationException("Unable to PulseGuide whilst slewing to target.");
 
@@ -1645,11 +1674,17 @@ namespace ASCOM.Meade.net
             return _utilities.HMSToHours(hms);
         }
         
+        double _lastGoodRightAsension;
+
         public double RightAscension
         {
             get
             {
                 CheckConnected("RightAscension Get");
+                try
+                {
+                    CheckParked();
+
                     var result = SharedResourcesWrapper.SendString(":GR#");
                     //:GR# Get Telescope RA
                     //Returns: HH:MM.T# or HH:MM:SS#
@@ -1658,8 +1693,24 @@ namespace ASCOM.Meade.net
                     double rightAscension = HmToHours(result);
 
                     LogMessage("RightAscension", $"Get - {result} convert to {rightAscension} {_utilitiesExtra.HoursToHMS(rightAscension)}");
+                    _lastGoodRightAsension = rightAscension;
                     return rightAscension;
                 }
+                catch (ParkedException)
+                {
+                    switch (ParkedBehaviour)
+                    {
+                        case ParkedBehaviour.LastGoodPosition:
+                            return _lastGoodRightAsension;
+                        case ParkedBehaviour.ReportCoordinates:
+                            var raDec = _astroMaths.ConvertHozToEq(UTCDate, SiteLatitude, SiteLongitude, ParkedAltAz);
+                            return raDec.RightAscension;
+                        default:
+                            throw;
+                    }
+                }
+                
+            }
         }
 
         public double RightAscensionRate
@@ -1870,6 +1921,7 @@ namespace ASCOM.Meade.net
         {
             LogMessage("SlewToAltAz", $"Az=~{azimuth} Alt={altitude}");
             CheckConnected("SlewToAltAz");
+            CheckParked();
 
             SlewToAltAzAsync(azimuth, altitude);
 
@@ -1882,6 +1934,7 @@ namespace ASCOM.Meade.net
         public void SlewToAltAzAsync(double azimuth, double altitude)
         {
             CheckConnected("SlewToAltAzAsync");
+            CheckParked();
 
             if (altitude > 90)
                 throw new InvalidValueException("Altitude cannot be greater than 90.");
@@ -1922,6 +1975,7 @@ namespace ASCOM.Meade.net
         private void DoSlewAsync(bool polar)
         {
             CheckConnected("DoSlewAsync");
+            CheckParked();
 
             SharedResourcesWrapper.Lock(() =>
             {
@@ -1986,6 +2040,7 @@ namespace ASCOM.Meade.net
         {
             LogMessage("SlewToCoordinates", $"Ra={rightAscension}, Dec={declination}");
             CheckConnected("SlewToCoordinates");
+            CheckParked();
 
             SlewToCoordinatesAsync(rightAscension, declination);
 
@@ -2001,6 +2056,7 @@ namespace ASCOM.Meade.net
         {
             LogMessage("SlewToCoordinatesAsync", $"Ra={rightAscension}, Dec={declination}");
             CheckConnected("SlewToCoordinatesAsync");
+            CheckParked();
 
             SharedResourcesWrapper.Lock(() =>
                 {
@@ -2016,6 +2072,7 @@ namespace ASCOM.Meade.net
         {
             LogMessage("SlewToTarget", "Executing");
             CheckConnected("SlewToTarget");
+            CheckParked();
             SlewToTargetAsync();
 
             while (Slewing)
@@ -2029,6 +2086,7 @@ namespace ASCOM.Meade.net
         public void SlewToTargetAsync()
         {
             CheckConnected("SlewToTargetAsync");
+            CheckParked();
 
             if (TargetDeclination.Equals(InvalidParameter) || TargetRightAscension.Equals(InvalidParameter))
                 throw new InvalidOperationException("No target selected to slew to.");
@@ -2167,6 +2225,7 @@ namespace ASCOM.Meade.net
             LogMessage("SyncToCoordinates", $"RA={rightAscension} Dec={declination}");
             LogMessage("SyncToCoordinates", $"RA={_utilitiesExtra.HoursToHMS(rightAscension)} Dec={_utilitiesExtra.HoursToHMS(declination)}");
             CheckConnected("SyncToCoordinates");
+            CheckParked();
 
             SharedResourcesWrapper.Lock(() =>
             {
@@ -2181,6 +2240,7 @@ namespace ASCOM.Meade.net
         {
             LogMessage("SyncToTarget", "Executing");
             CheckConnected("SyncToTarget");
+            CheckParked();
                 
             var result = SharedResourcesWrapper.SendString(":CM#");
             //:CM# Synchronizes the telescope's position with the currently selected database object's coordinates.
@@ -2234,6 +2294,7 @@ namespace ASCOM.Meade.net
                 LogMessage("TargetDeclination Set", $"{value}");
 
                 CheckConnected("TargetDeclination Set");
+                CheckParked();
 
                 if (value > 90)
                     throw new InvalidValueException("Declination cannot be greater than 90.");
@@ -2289,6 +2350,7 @@ namespace ASCOM.Meade.net
             {
                 LogMessage("TargetRightAscension Set", $"{value}");
                 CheckConnected("TargetRightAscension Set");
+                CheckParked();
 
                 if (value < 0)
                     throw new InvalidValueException("Right ascension value cannot be below 0");
@@ -2357,6 +2419,7 @@ namespace ASCOM.Meade.net
             {
                 LogMessage("TrackingRate Set", $"{value}");
                 CheckConnected("TrackingRate Set");
+                CheckParked();
 
                 switch (value)
                 {

Meade.net/Meade.net.csproj

@@ -137,6 +137,7 @@
       <DependentUpon>frmMain.cs</DependentUpon>
     </Compile>
     <Compile Include="GarbageCollection.cs" />
+    <Compile Include="AstroMaths\HorizonCoordinates.cs" />
     <Compile Include="LocalServer.cs" />
     <Compile Include="MeadeTelescopeBase.cs" />
     <Compile Include="ParkedBehaviour.cs" />
@@ -201,6 +202,7 @@
       <Install>true</Install>
     </BootstrapperPackage>
   </ItemGroup>
+  <ItemGroup />
   <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
   <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
        Other similar extension points exist, see Microsoft.Common.targets.

Meade.net/MeadeTelescopeBase.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Reflection;
 using System.Runtime.InteropServices;
+using ASCOM.Meade.net.AstroMaths;
 using ASCOM.Meade.net.Wrapper;
 using ASCOM.Utilities;
 
@@ -30,8 +31,7 @@ namespace ASCOM.Meade.net
         protected short ProfileSettleTime;
         protected bool SendDateTime;
         protected ParkedBehaviour ParkedBehaviour;
-        protected double ParkedAzimuth;
+        protected HorizonCoordinates ParkedAltAz;
-        protected double ParkedAlt;
 
     protected readonly ISharedResourcesWrapper SharedResourcesWrapper;
 
@@ -75,8 +75,12 @@ namespace ASCOM.Meade.net
             ProfileSettleTime = profileProperties.SettleTime;
             SendDateTime = profileProperties.SendDateTime;
             ParkedBehaviour = profileProperties.ParkedBehaviour;
-            ParkedAlt = profileProperties.ParkedAlt;
+
-            ParkedAzimuth = profileProperties.ParkedAz;
+            var ParkedAltAz = new HorizonCoordinates
+            {
+                Altitude = profileProperties.ParkedAlt,
+                Azimuth = profileProperties.ParkedAz
+            };
             
             LogMessage("ReadProfile", $"Trace logger enabled: {Tl.Enabled}");
             LogMessage("ReadProfile", $"Com Port: {ComPort}");
@@ -89,8 +93,8 @@ namespace ASCOM.Meade.net
             LogMessage("ReadProfile", $"Settle Time after slew: {ProfileSettleTime}");
             LogMessage("ReadProfile", $"Send date and time on connect: {SendDateTime}");
             LogMessage("ReadProfile", $"Parked Behaviour: {ParkedBehaviour}");
-            LogMessage("ReadProfile", $"Parked Alt: {ParkedAlt}");
+            LogMessage("ReadProfile", $"Parked Alt: {ParkedAltAz.Altitude}");
-            LogMessage("ReadProfile", $"Parked Az: {ParkedAzimuth}");
+            LogMessage("ReadProfile", $"Parked Az: {ParkedAltAz.Azimuth}");
         }
 
         /// <summary>