Change M10 satellites field to sats, re-add number of sats check to auto_rx.py

auto_rx/auto_rx.py

@@ -326,6 +326,7 @@ def telemetry_filter(telemetry):
     # First Check: zero lat/lon
     if (telemetry['lat'] == 0.0) and (telemetry['lon'] == 0.0):
         logging.warning("Zero Lat/Lon. Sonde %s does not have GPS lock." % telemetry['id'])
+        logging.debug(str(telemetry))
         return False
 
     # Second check: Altitude cap.
@@ -334,7 +335,15 @@ def telemetry_filter(telemetry):
         logging.warning("Sonde %s position breached altitude cap by %d m." % (telemetry['id'], _altitude_breach))
         return False
 
-    # Third check - is the payload more than x km from our listening station.
+
+    # Third check: Number of satellites visible.
+    if 'sats' in telemetry:
+        if telemetry['sats'] < 4:
+            logging.warning("Sonde %s can only see %d SVs - discarding position as bad." % (telemetry['id'],telemetry['sats']))
+            logging.debug(str(telemetry))
+            return False
+
+    # Fourth check - is the payload more than x km from our listening station.
     # Only run this check if a station location has been provided.
     if (config['station_lat'] != 0.0) and (config['station_lon'] != 0.0):
         # Calculate the distance from the station to the payload.
@@ -346,6 +355,7 @@ def telemetry_filter(telemetry):
         if _info['straight_distance'] > config['max_radius_km']*1000:
             _radius_breach = _info['straight_distance']/1000.0 - config['max_radius_km']
             logging.warning("Sonde %s position breached radius cap by %.1f km." % (telemetry['id'], _radius_breach))
+            logging.debug(str(telemetry))
             return False
 
     # Payload Serial Number Checks

m10/M10TrimbleParser.cpp

@@ -454,7 +454,7 @@ void M10TrimbleParser::printFrame() {
                 "\"dxlid\": \"%s\", "
                 "\"datetime\": \"%04d-%02d-%02dT%02d:%02d:%02dZ\", "
                 "%s" // Aux data
-                "\"satellites\": %d, "
+                "\"sats\": %d, "
                 "\"lat\": %.5f, "
                 "\"lon\": %.5f, "
                 "\"alt\": %.2f, "