Reset accuracy and NACp on GPS disconnect. Add sample rate to GPS UI page.

main/gps.go

@@ -530,7 +530,7 @@ func calcGPSAttitude() bool {
 	var lengthHeading, lengthSpeed int
 
 	center := float64(myGPSPerfStats[index].nmeaTime) // current time for calculating regression weights
-	halfwidth := float64(1.4)                         // width of regression evaluation window. Default of 1.4 seconds for 5 Hz sampling; will increase up to 3.5 sec @ 1 Hz
+	halfwidth := float64(1.4)                         // width of regression evaluation window. Default of 1.4 seconds for 10 Hz sampling; will increase to 2.8 sec @ 5 Hz, and to 3.5 sec @ 1 Hz
 
 	// frequency detection
 	tempSpeedTime = make([]float64, 0)
@@ -1962,7 +1962,7 @@ func isGPSConnected() bool {
 isGPSValid returns true only if a valid position fix has been seen in the last 15 seconds,
 and if the GPS subsystem has recently detected a GPS device.
 
-If false, 'Quality` is set to 0 ("No fix"), as is the number of satellites in solution.
+If false, 'Quality` is set to 0 ("No fix"), NACp == 0, and horizontal / vertical accuracy set to large numbers
 */
 
 func isGPSValid() bool {
@@ -1972,6 +1972,9 @@ func isGPSValid() bool {
 	} else {
 		mySituation.Quality = 0
 		mySituation.Satellites = 0
+		mySituation.Accuracy = 999999
+		mySituation.AccuracyVert = 999999
+		mySituation.NACp = 0
 	}
 	return isValid
 }

web/plates/gps.html

@@ -83,7 +83,7 @@
 			<div class="panel-footer">
 				<div class="row">
 					<label class="col-xs-6">GPS solution:</label>
-					<span class="col-xs-6">{{SolutionText}}</span>
+					<span class="col-xs-6">{{SolutionText}} @ {{PositionSampleRate}} Hz</span>
 				</div>
 				<div class="row">
 					<label class="col-xs-6">Summary:</label>

web/plates/js/gps.js

@@ -72,6 +72,9 @@ function GPSCtrl($rootScope, $scope, $state, $http, $interval) {
 		}
 		$scope.SolutionText = solutionText;
 		
+		$scope.PositionSampleRate = (status.Quality ? status.PositionSampleRate.toFixed(1) : "N/A");
+		
+		
 		$scope.gps_accuracy = status.Accuracy.toFixed(1);
                 $scope.gps_vert_accuracy = (status.AccuracyVert*3.2808).toFixed(1); // accuracy is in meters, need to display in ft