// building GGA sentence
outString = "GNGGA,000000,"; //SentenceIdentifier,Time
if(Tlat<10) {outString += "0"; }
outString += String(Lat,4); //latitude
outString += ",";
outString += Ns; //N or S latitude
outString += ",";
if(Tlon<100) {outString += "0"; }
if(Tlon<10) {outString += "0"; }
outString += String(Lon,4); //longitude
outString += ",";
outString += Ew; //E or W longitude
outString += ",1,10,1.5,"; //,FixQuality,NumberOfSats,HDOP,
outString += Talt; //Altitude [m]
outString += ".0,M,0.0,M,,,"; //,M,HeightAboveWGS84,M,-,-,