little helper script

selfdrive/locationd/test/print_gps_stats.py

@@ -0,0 +1,20 @@
+#!/usr/bin/env python3
+import time
+import cereal.messaging as messaging
+
+if __name__ == "__main__":
+  sm = messaging.SubMaster(['ubloxGnss', 'gpsLocationExternal'])
+
+  while 1:
+    ug = sm['ubloxGnss']
+    gle = sm['gpsLocationExternal']
+
+    try:
+      cnos = []
+      for m in ug.measurementReport.measurements:
+        cnos.append(m.cno)
+      print("Sats: %d   Accuracy: %.2f m   cnos" % (ug.measurementReport.numMeas, gle.accuracy), sorted(cnos))
+    except:
+      pass
+    sm.update()
+    time.sleep(0.1)