public void TestGpgsv()
{
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;
Assert.AreEqual(3, gsv.TotalMessages);
Assert.AreEqual(3, gsv.MessageNumber);
Assert.AreEqual(11, gsv.SVsInView);
Assert.IsNotNull(gsv.SVs);
Assert.AreEqual(3, gsv.SVs.Count);
var sv = gsv.SVs[0];
Assert.AreEqual(22, sv.PrnNumber);
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(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(50, sv.PrnNumber);
Assert.AreEqual(5, sv.Elevation);
Assert.AreEqual(244, sv.Azimuth);
Assert.AreEqual(00, sv.SignalToNoiseRatio);
Assert.AreEqual(SatelliteSystem.Waas, sv.System);
}
/// <summary>
/// Event handler for the SerialGPS, parses the NMEA message and updates CurrentGeopoint.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void _serialGPSDevice_MessageReceived(object sender, NmeaMessageReceivedEventArgs e)
{
if (!_serialGPSDeviceFound)
{
_serialGPSDeviceFound = true;
}
double Latitude = 0.0, Longitude = 0.0;
NMEAMessage = e.Message.ToString();
//Parse all NMEA messages supported by BU353-s4.
//Only GGA, RMC, and GLL support location
switch (e.Message.MessageType)
{
case "GPGGA":
Gpgga gga = (Gpgga)e.Message;
Latitude = gga.Latitude;
Longitude = gga.Longitude;
break;
case "GPRMC":
Gprmc rmc = (Gprmc)e.Message;
Latitude = rmc.Latitude;
Longitude = rmc.Longitude;
break;
case "GPGLL":
Gpgll gll = (Gpgll)e.Message;
Latitude = gll.Latitude;
Longitude = gll.Longitude;
break;
case "GPGSA":
Gpgsa gsa = (Gpgsa)e.Message;
break;
case "GPGSV":
Gpgsv gsv = (Gpgsv)e.Message;
break;
}
//make sure the delta-p is above a threshold
if (Latitude != 0.0 && Longitude != 0.0)
{
double distance = Haversine(Latitude, Longitude, CurrentGeopoint.Position.Latitude, CurrentGeopoint.Position.Longitude);
if (distance > 0) //2.5m is minimum accuracy of BU-353 S4 and WAAS/SBAS corrections
{
CurrentGeopoint = CreateGeopoint(Latitude, Longitude);
}
}
}
private void NmeaStreamDevice_MessageReceived(object sender, NmeaMessageReceivedEventArgs e)
{
if (!messageStats.ContainsKey(e.Message.MessageType))
{
messageStats.Add(e.Message.MessageType, 0);
}
messageStats[e.Message.MessageType]++;
switch (e.Message.MessageType)
{
case "GPGSV":
Gpgsv gpgsv = (Gpgsv)e.Message;
numSattelites = gpgsv.SVsInView;
break;
case "GPGLL": //enthält GPS Daten
Gpgll gpgll = (Gpgll)e.Message;
if (gpgll.DataActive)
{
lon = gpgll.Longitude;
lat = gpgll.Latitude;
validGpsSignal = true;
gpsLlTimestamp = DateTime.Now;
}
break;
case "GPGSA":
Gpgsa gpgsa = (Gpgsa)e.Message;
fixMode = gpgsa.FixMode;
break;
case "GPRMC": //enthält GPS Daten
Gprmc gprmc = (Gprmc)e.Message;
break;
case "GPVTG":
break;
case "GPZDA":
break;
case "GPGGA": //enthält GPS Daten
Gpgga gpgga = (Gpgga)e.Message;
altitude = gpgga.Altitude;
break;
default:
lock (lockVictim)
{
tourStreamWriter.WriteLine(String.Format("UNIMP_GPS;", e.Message.ToString()));
}
break;
}
}
public void TestGpgsv_Empty()
{
string input = "$GPGSV,1,1,0,,,,,,,,,,,,,,,,*49";
var msg = NmeaMessage.Parse(input);
Assert.IsInstanceOfType(msg, typeof(Gpgsv));
Gpgsv gsv = (Gpgsv)msg;
Assert.AreEqual(1, gsv.TotalMessages);
Assert.AreEqual(1, gsv.MessageNumber);
Assert.AreEqual(0, gsv.SVsInView);
Assert.IsNotNull(gsv.SVs);
Assert.AreEqual(0, gsv.SVs.Count);
}
