Merge pull request #32 from david-chambers/master

Add GNGST message

src/NmeaParser.Shared/Nmea/Gnss/Gngst.cs

@@ -0,0 +1,80 @@
+using System;
+
+namespace NmeaParser.Nmea.Gnss
+{
+    /// <summary>
+    /// Position error statistics 
+    /// </summary>
+    [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Naming", "CA1704:IdentifiersShouldBeSpelledCorrectly", MessageId = "Gngst")]
+    [NmeaMessageType("GNGST")]
+    public class Gngst : NmeaMessage
+    {
+        /// <summary>
+        /// Called when the message is being loaded.
+        /// </summary>
+        /// <param name="message">The NMEA message values.</param>
+        protected override void OnLoadMessage(string[] message)
+        {
+            if (message == null || message.Length < 8)
+                throw new ArgumentException("Invalid GNGST", "message");
+            FixTime = StringToTimeSpan(message[0]);
+            Rms = NmeaMessage.StringToDouble(message[1]);
+            SemiMajorError = NmeaMessage.StringToDouble(message[2]);
+            SemiMinorError = NmeaMessage.StringToDouble(message[3]);
+            ErrorOrientation = NmeaMessage.StringToDouble(message[4]);
+            SigmaLatitudeError = NmeaMessage.StringToDouble(message[5]);
+            SigmaLongitudeError = NmeaMessage.StringToDouble(message[6]);
+            SigmaHeightError = NmeaMessage.StringToDouble(message[7]);
+        }
+
+        /// <summary>
+	/// UTC of position fix
+	/// </summary>
+	public TimeSpan FixTime { get; private set; }
+
+        /// <summary>
+        /// RMS value of the pseudorange residuals; includes carrier phase residuals during periods of RTK (float) and RTK (fixed) processing
+        /// </summary>
+        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Naming", "CA1704:IdentifiersShouldBeSpelledCorrectly", MessageId = "Rms")]
+        public double Rms { get; private set; }
+
+        /// <summary>
+        /// Error ellipse semi-major axis 1 sigma error, in meters
+        /// </summary>
+        public double SemiMajorError { get; private set; }
+
+        /// <summary>
+        /// Error ellipse semi-minor axis 1 sigma error, in meters
+        /// </summary>
+        public double SemiMinorError { get; private set; }
+
+        /// <summary>
+        /// Error ellipse orientation, degrees from true north
+        /// </summary>
+        public double ErrorOrientation { get; private set; }
+
+        /// <summary>
+        /// Latitude 1 sigma error, in meters
+        /// </summary>
+        /// <remarks>
+        /// The error expressed as one standard deviation.
+        /// </remarks>
+        public double SigmaLatitudeError { get; private set; }
+
+        /// <summary >
+        /// Longitude 1 sigma error, in meters
+        /// </summary>
+        /// <remarks>
+        /// The error expressed as one standard deviation.
+        /// </remarks>
+        public double SigmaLongitudeError { get; private set; }
+
+        /// <summary >
+        /// Height 1 sigma error, in meters
+        /// </summary>
+        /// <remarks>
+        /// The error expressed as one standard deviation.
+        /// </remarks>
+        public double SigmaHeightError { get; private set; }
+    }
+}

src/NmeaParser.Shared/NmeaParser.Shared.projitems

@@ -13,6 +13,7 @@
     <Compile Include="$(MSBuildThisFileDirectory)IMultiPartMessage.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)NmeaDevice.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)NmeaFileDevice.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Nmea\Gnss\Gngst.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Nmea\Gps\Garmin\PGRMZ.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Nmea\Gps\Garmin\PGRME.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Nmea\Gps\GPGLL.cs" />

src/NmeaParser.Tests/NmeaMessages.cs

@@ -1,4 +1,4 @@
-//
+//
 // Copyright (c) 2014 Morten Nielsen
 //
 // Licensed under the Microsoft Public License (Ms-PL) (the "License");
@@ -23,6 +23,7 @@ using NmeaParser.Nmea;
 using NmeaParser.Nmea.Gps;
 using System.Threading.Tasks;
 using System.IO;
+using NmeaParser.Nmea.Gnss;
 
 namespace NmeaParser.Tests
 {
@@ -374,5 +375,22 @@ namespace NmeaParser.Tests
 			Assert.AreEqual(0.020, gst.SigmaLongitudeError);
 			Assert.AreEqual(0.031, gst.SigmaHeightError);
 		}
-	}
+
+        [TestMethod]
+        public void TestGngst()
+        {
+            string input = "$GNGST,172814.0,0.006,0.023,0.020,273.6,0.023,0.020,0.031*74";
+            var msg = NmeaMessage.Parse(input);
+            Assert.IsInstanceOfType(msg, typeof(Gngst));
+            Gngst gst = (Gngst)msg;
+            Assert.AreEqual(new TimeSpan(17, 28, 14), gst.FixTime);
+            Assert.AreEqual(0.006, gst.Rms);
+            Assert.AreEqual(0.023, gst.SemiMajorError);
+            Assert.AreEqual(0.02, gst.SemiMinorError);
+            Assert.AreEqual(273.6, gst.ErrorOrientation);
+            Assert.AreEqual(0.023, gst.SigmaLatitudeError);
+            Assert.AreEqual(0.020, gst.SigmaLongitudeError);
+            Assert.AreEqual(0.031, gst.SigmaHeightError);
+        }
+    }
 }