diff --git a/gps_tool/gps_tool.py b/gps_tool/gps_tool.py
index 9f2dc33..d013e0f 100755
--- a/gps_tool/gps_tool.py
+++ b/gps_tool/gps_tool.py
@@ -7,6 +7,7 @@ import yaml
 from math import radians
 from datetime import datetime
 from time import strftime, time
+from pprint import pprint
 
 from gps import *
 import gpxpy
@@ -165,88 +166,93 @@ class QtGPSWindow(MainWindow):
     elif report['class'] == 'SKY':
       self.txtHDOP.setText(str(getattr(report, 'hdop', 0.0)))
       self.txtVDOP.setText(str(getattr(report, 'vdop', 0.0)))
-      satellites = getattr(report, 'satellites')
 
-      txt = "%4s %4s %4s %3s %1s" % ('PRN', 'Azim', 'Elev', 'SNR', 'Used')
-      self.txtSatellites.setStyleSheet("background-color: rgb(0, 0, 0)")
-      self.txtSatellites.setTextColor(self.white)
-      self.txtSatellites.setFontWeight(QFont.Bold)
-      self.txtSatellites.setText(txt)
-      
-      prns = []
-      radius = []
-      theta = []
-      colors = []
-      markers = []
-      
-      for (i, satellite) in enumerate(satellites):
-        prn = int(satellite['PRN'])
-        azim = int(satellite['az'])
-        elev = int(satellite['el'])
-        snr = int(satellite['ss'])
-        used = int(satellite['used'])
-#        health = satellite['health']
+      try:
+        satellites = report['satellites']
 
-        # don't show if not visible
-        if azim >= 360 or elev < -10 or elev > 90:
-          continue;
-        
-        cname = '#000000'
-        color = self.black
-        if snr < 12:
-          cname = '#808080'
-          color = self.gray
-        elif snr < 30:
-          cname = '#ff0000'
-          color = self.red
-        elif snr < 36:
-          cname = '#ffd300'
-          color = self.yellow
-        elif snr < 42:
-          cname = '#00ff00'
-          color = self.green
-        else:
-          cname = '#0000ff'
-          color = self.blue
-        
-        txt = "%4u %4u %4u %3u %1u" % (prn, azim, elev, snr, used)
-        self.txtSatellites.setTextColor(color)
-        if used:
-          self.txtSatellites.setFontWeight(QFont.Bold)
-        else:
-          self.txtSatellites.setFontWeight(QFont.Normal)          
-        self.txtSatellites.append(txt)
-        
-        prns.append(prn)
-        theta.append(radians(float(azim)))
-        radius.append(float(elev))
-        colors.append(cname)
-        if used:
-          markers.append(ord('P'))
-        else:
-          markers.append(ord('+'))
+        txt = "%4s %4s %4s %3s %1s" % ('PRN', 'Azim', 'Elev', 'SNR', 'Used')
+        self.txtSatellites.setStyleSheet("background-color: rgb(0, 0, 0)")
+        self.txtSatellites.setTextColor(self.white)
+        self.txtSatellites.setFontWeight(QFont.Bold)
+        self.txtSatellites.setText(txt)
       
-      area = 100
-      figure = Figure()
-      polar = figure.add_subplot(111, projection='polar')
-      polar.scatter(theta, radius, c=colors, s=area, cmap=None, alpha=0.75)
-      polar.set_rorigin(90.0)
-      polar.set_xticklabels([])
-      polar.set_yticklabels([])
-      for i, prn in enumerate(prns):
-        polar.annotate(str(prn), (theta[i], radius[i]))
+        prns = []
+        radius = []
+        theta = []
+        colors = []
+        markers = []
+
+        for satellite in satellites:
+          prn = int(satellite['PRN'])
+          azim = int(satellite['az'])
+          elev = int(satellite['el'])
+          snr = int(satellite['ss'])
+          used = int(satellite['used'])
+#          health = satellite['health']
+
+          # don't show if not visible
+          if azim >= 360 or elev < -10 or elev > 90:
+            continue;
+        
+          cname = '#000000'
+          color = self.black
+          if snr < 12:
+            cname = '#808080'
+            color = self.gray
+          elif snr < 30:
+            cname = '#ff0000'
+            color = self.red
+          elif snr < 36:
+            cname = '#ffd300'
+            color = self.yellow
+          elif snr < 42:
+            cname = '#00ff00'
+            color = self.green
+          else:
+            cname = '#0000ff'
+            color = self.blue
+        
+          txt = "%4u %4u %4u %3u %1u" % (prn, azim, elev, snr, used)
+          self.txtSatellites.setTextColor(color)
+          if used:
+            self.txtSatellites.setFontWeight(QFont.Bold)
+          else:
+            self.txtSatellites.setFontWeight(QFont.Normal)
+          self.txtSatellites.append(txt)
+        
+          prns.append(prn)
+          theta.append(radians(float(azim)))
+          radius.append(float(elev))
+          colors.append(cname)
+          if used:
+            markers.append(ord('P'))
+          else:
+            markers.append(ord('+'))
+
+        area = 100
+        figure = Figure()
+        polar = figure.add_subplot(111, projection='polar')
+        polar.scatter(theta, radius, c=colors, s=area, cmap=None, alpha=0.75)
+        polar.set_rorigin(90.0)
+        polar.set_xticklabels([])
+        polar.set_yticklabels([])
+        for i, prn in enumerate(prns):
+          polar.annotate(str(prn), (theta[i], radius[i]))
     
-      polar.set_theta_direction(-1)
-      polar.set_theta_zero_location('N', offset=0)
+        polar.set_theta_direction(-1)
+        polar.set_theta_zero_location('N', offset=0)
+
+        canvas = FigureCanvas(figure)
+        self.scene.clear()
+        self.scene.addWidget(canvas)
+        h = float(self.scene.height()) / 2.0
+        w = float(self.scene.width()) / 2.0
+        self.viewSatellites.centerOn(w,h)
+        self.viewSatellites.show()
+
+      except:
+        pass
 
-      canvas = FigureCanvas(figure)
-      self.scene.clear()
-      self.scene.addWidget(canvas)
-      h = float(self.scene.height()) / 2.0
-      w = float(self.scene.width()) / 2.0
-      self.viewSatellites.centerOn(w,h)
-      self.viewSatellites.show()
-      
     self.show()
   
   def toggle_logging(self):