From 8f692a4aab5cf5b08d7a0186f8d2e5f44cc7f7d7 Mon Sep 17 00:00:00 2001
From: mort5161 <mnielsen@esri.com>
Date: Fri, 14 Nov 2014 15:20:51 -0800
Subject: [PATCH] Added satellite system property (GPS/Glonass/Waas)

---
 src/NmeaParser.Shared/Nmea/Gps/GPGSV.cs | 40 +++++++++++++++++++++++++
 src/NmeaParser.Tests/NmeaMessages.cs    |  9 ++++--
 2 files changed, 46 insertions(+), 3 deletions(-)

diff --git a/src/NmeaParser.Shared/Nmea/Gps/GPGSV.cs b/src/NmeaParser.Shared/Nmea/Gps/GPGSV.cs
index 2deec37..e592a07 100644
--- a/src/NmeaParser.Shared/Nmea/Gps/GPGSV.cs
+++ b/src/NmeaParser.Shared/Nmea/Gps/GPGSV.cs
@@ -105,5 +105,45 @@ namespace NmeaParser.Nmea.Gps
 		/// Signal-to-Noise ratio, 0-99 dB (-1 when not tracking) 
 		/// </summary>
 		public int SignalToNoiseRatio { get; private set; }
+
+		/// <summary>
+		/// Satellite system
+		/// </summary>
+		public SatelliteSystem System
+		{
+			get
+			{
+				if (PrnNumber >= 1 && PrnNumber <= 32)
+					return SatelliteSystem.Gps;
+				if (PrnNumber >= 33 && PrnNumber <= 64)
+					return SatelliteSystem.Waas;
+				if (PrnNumber >= 65 && PrnNumber <= 96)
+					return SatelliteSystem.Glonass;
+				return SatelliteSystem.Unknown;
+			}
+		}
+	}
+
+	/// <summary>
+	/// Satellite system
+	/// </summary>
+	public enum SatelliteSystem
+	{
+		/// <summary>
+		/// Unknown
+		/// </summary>
+		Unknown,
+		/// <summary>
+		/// GPS - Global Positioning System (NAVSTAR)
+		/// </summary>
+		Gps,
+		/// <summary>
+		/// WAAS - Wide Area Augmentation System
+		/// </summary>
+		Waas,
+		/// <summary>
+		/// GLONASS - Globalnaya navigatsionnaya sputnikovaya sistema
+		/// </summary>
+		Glonass
 	}
 }
diff --git a/src/NmeaParser.Tests/NmeaMessages.cs b/src/NmeaParser.Tests/NmeaMessages.cs
index e30445b..4f904f1 100644
--- a/src/NmeaParser.Tests/NmeaMessages.cs
+++ b/src/NmeaParser.Tests/NmeaMessages.cs
@@ -196,7 +196,7 @@ namespace NmeaParser.Tests
 		[TestMethod]
 		public void TestGpgsv()
 		{
-			string input = "$GPGSV,3,3,11,22,42,067,42,24,14,311,43,27,05,244,00,,,,*4D";
+			string input = "$GPGSV,3,3,11,22,42,067,42,75,14,311,43,50,05,244,00,,,,*49";
 			var msg = NmeaMessage.Parse(input);
 			Assert.IsInstanceOfType(msg, typeof(Gpgsv));
 			Gpgsv gsv = (Gpgsv)msg;
@@ -210,18 +210,21 @@ namespace NmeaParser.Tests
 			Assert.AreEqual(42, sv.Elevation);
 			Assert.AreEqual(67, sv.Azimuth);
 			Assert.AreEqual(42, sv.SignalToNoiseRatio);
+			Assert.AreEqual(SatelliteSystem.Gps, sv.System);
 
 			sv = gsv.SVs[1];
-			Assert.AreEqual(24, sv.PrnNumber);
+			Assert.AreEqual(75, sv.PrnNumber);
 			Assert.AreEqual(14, sv.Elevation);
 			Assert.AreEqual(311, sv.Azimuth);
 			Assert.AreEqual(43, sv.SignalToNoiseRatio);
+			Assert.AreEqual(SatelliteSystem.Glonass, sv.System);
 
 			sv = gsv.SVs[2];
-			Assert.AreEqual(27, sv.PrnNumber);
+			Assert.AreEqual(50, sv.PrnNumber);
 			Assert.AreEqual(5, sv.Elevation);
 			Assert.AreEqual(244, sv.Azimuth);
 			Assert.AreEqual(00, sv.SignalToNoiseRatio);
+			Assert.AreEqual(SatelliteSystem.Waas, sv.System);
 		}
 
 		[TestMethod]