diff --git a/android/GnssDebug.cpp b/android/GnssDebug.cpp
index 3d2b8bda..33d7aa52 100644
--- a/android/GnssDebug.cpp
+++ b/android/GnssDebug.cpp
@@ -30,8 +30,14 @@ namespace implementation {
 
 using ::android::hardware::hidl_vec;
 
-#define GNSS_DEBUG_UNKNOWN_UTC_TIME     (1483228800000ULL) // 1/1/2017 00:00 GMT
-#define GNSS_DEBUG_UNKNOWN_UTC_TIME_UNC (1.57783680E17) // 5 years in ns
+#define GNSS_DEBUG_UNKNOWN_HORIZONTAL_ACCURACY_METERS (20000000)
+#define GNSS_DEBUG_UNKNOWN_VERTICAL_ACCURACY_METERS   (20000)
+#define GNSS_DEBUG_UNKNOWN_SPEED_ACCURACY_PER_SEC     (500)
+#define GNSS_DEBUG_UNKNOWN_BEARING_ACCURACY_DEG       (180)
+
+#define GNSS_DEBUG_UNKNOWN_UTC_TIME            (1483228800000LL) // 1/1/2017 00:00 GMT
+#define GNSS_DEBUG_UNKNOWN_UTC_TIME_UNC        (1.57783680E17) // 5 years in ns
+#define GNSS_DEBUG_UNKNOWN_FREQ_UNC_NS_PER_SEC (2.0e5)  // ppm
 
 GnssDebug::GnssDebug(Gnss* gnss) : mGnss(gnss)
 {
@@ -89,6 +95,23 @@ Return<void> GnssDebug::getDebugData(getDebugData_cb _hidl_cb)
         data.position.valid = false;
     }
 
+    if (data.position.horizontalAccuracyMeters <= 0 ||
+        data.position.horizontalAccuracyMeters > GNSS_DEBUG_UNKNOWN_HORIZONTAL_ACCURACY_METERS) {
+        data.position.horizontalAccuracyMeters = GNSS_DEBUG_UNKNOWN_HORIZONTAL_ACCURACY_METERS;
+    }
+    if (data.position.verticalAccuracyMeters <= 0 ||
+        data.position.verticalAccuracyMeters > GNSS_DEBUG_UNKNOWN_VERTICAL_ACCURACY_METERS) {
+        data.position.verticalAccuracyMeters = GNSS_DEBUG_UNKNOWN_VERTICAL_ACCURACY_METERS;
+    }
+    if (data.position.speedAccuracyMetersPerSecond <= 0 ||
+        data.position.speedAccuracyMetersPerSecond > GNSS_DEBUG_UNKNOWN_SPEED_ACCURACY_PER_SEC) {
+        data.position.speedAccuracyMetersPerSecond = GNSS_DEBUG_UNKNOWN_SPEED_ACCURACY_PER_SEC;
+    }
+    if (data.position.bearingAccuracyDegrees <= 0 ||
+        data.position.bearingAccuracyDegrees > GNSS_DEBUG_UNKNOWN_BEARING_ACCURACY_DEG) {
+        data.position.bearingAccuracyDegrees = GNSS_DEBUG_UNKNOWN_BEARING_ACCURACY_DEG;
+    }
+
     // time block
     if (reports.mTime.mValid) {
         data.time.timeEstimate = reports.mTime.timeEstimate;
@@ -96,10 +119,18 @@ Return<void> GnssDebug::getDebugData(getDebugData_cb _hidl_cb)
         data.time.frequencyUncertaintyNsPerSec =
             reports.mTime.frequencyUncertaintyNsPerSec;
     }
-    else {
+
+    if (data.time.timeEstimate <= 0 ||
+        data.time.timeEstimate > GNSS_DEBUG_UNKNOWN_UTC_TIME) {
         data.time.timeEstimate = GNSS_DEBUG_UNKNOWN_UTC_TIME;
-        data.time.timeUncertaintyNs = (float)(GNSS_DEBUG_UNKNOWN_UTC_TIME_UNC);
-        data.time.frequencyUncertaintyNsPerSec = 0;
+    }
+    if (data.time.timeUncertaintyNs <= 0 ||
+        data.time.timeUncertaintyNs > (float)GNSS_DEBUG_UNKNOWN_UTC_TIME_UNC) {
+        data.time.timeUncertaintyNs = (float)GNSS_DEBUG_UNKNOWN_UTC_TIME_UNC;
+    }
+    if (data.time.frequencyUncertaintyNsPerSec <= 0 ||
+        data.time.frequencyUncertaintyNsPerSec > (float)GNSS_DEBUG_UNKNOWN_FREQ_UNC_NS_PER_SEC) {
+        data.time.frequencyUncertaintyNsPerSec = (float)GNSS_DEBUG_UNKNOWN_FREQ_UNC_NS_PER_SEC;
     }
 
     // satellite data block
diff --git a/gnss/GnssAdapter.cpp b/gnss/GnssAdapter.cpp
index 098c8aa0..5a1eb256 100644
--- a/gnss/GnssAdapter.cpp
+++ b/gnss/GnssAdapter.cpp
@@ -1,4 +1,4 @@
-/* Copyright (c) 2017-2018, The Linux Foundation. All rights reserved.
+/* Copyright (c) 2017, The Linux Foundation. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
@@ -3043,6 +3043,9 @@ bool GnssAdapter::getDebugReport(GnssDebugReport& r)
         r.mLocation.mLocation.longitude =
                 (double)(reports.mBestPosition.back().mBestLon) * RAD2DEG;
         r.mLocation.mLocation.altitude = reports.mBestPosition.back().mBestAlt;
+        r.mLocation.mLocation.accuracy =
+                (double)(reports.mBestPosition.back().mBestHepe);
+
         r.mLocation.mUtcReported = reports.mBestPosition.back().mUtcReported;
     }
     else {