diff --git a/gnss/2.0/Android.bp b/gnss/2.0/Android.bp
index 39fe97d..6a06bf4 100644
--- a/gnss/2.0/Android.bp
+++ b/gnss/2.0/Android.bp
@@ -8,14 +8,17 @@
     },
     srcs: [
         "IGnss.hal",
+        "IGnssCallback.hal",
         "IGnssMeasurement.hal",
         "IGnssMeasurementCallback.hal",
     ],
     interfaces: [
+        "android.hardware.gnss.measurement_corrections@1.0",
         "android.hardware.gnss@1.0",
         "android.hardware.gnss@1.1",
         "android.hidl.base@1.0",
     ],
     gen_java: true,
+    gen_java_constants: true,
 }
 
diff --git a/gnss/2.0/IGnss.hal b/gnss/2.0/IGnss.hal
index a05f61a..55621e5 100644
--- a/gnss/2.0/IGnss.hal
+++ b/gnss/2.0/IGnss.hal
@@ -16,12 +16,24 @@
 
 package android.hardware.gnss@2.0;
 
+import android.hardware.gnss.measurement_corrections@1.0::IMeasurementCorrections;
 import @1.1::IGnss;
 
+import IGnssCallback;
 import IGnssMeasurement;
 
 /** Represents the standard GNSS (Global Navigation Satellite System) interface. */
 interface IGnss extends @1.1::IGnss {
+     /**
+     * Opens the interface and provides the callback routines to the implementation of this
+     * interface.
+     *
+     * @param callback Callback interface for IGnss.
+     *
+     * @return success Returns true on success.
+     */
+    setCallback_2_0(IGnssCallback callback) generates (bool success);
+
     /**
      * This method returns the IGnssMeasurement interface.
      *
@@ -31,4 +43,12 @@
      * @return gnssMeasurementIface Handle to the IGnssMeasurement interface.
      */
     getExtensionGnssMeasurement_2_0() generates (IGnssMeasurement gnssMeasurementIface);
+
+    /**
+     * This method returns the IMeasurementCorrections interface.
+     *
+     * @return measurementCorrectionsIface Handle to the IMeasurementCorrections interface.
+     */
+     getExtensionMeasurementCorrections()
+            generates (IMeasurementCorrections measurementCorrectionsIface);
 };
\ No newline at end of file
diff --git a/gnss/2.0/IGnssCallback.hal b/gnss/2.0/IGnssCallback.hal
new file mode 100644
index 0000000..1cdd2c0
--- /dev/null
+++ b/gnss/2.0/IGnssCallback.hal
@@ -0,0 +1,47 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.hardware.gnss@2.0;
+
+import @1.0::IGnssCallback;
+import @1.1::IGnssCallback;
+
+/**
+ * The interface is required for the HAL to communicate certain information
+ * like status and location info back to the platform, the platform implements
+ * the interfaces and passes a handle to the HAL.
+ */
+interface IGnssCallback extends @1.1::IGnssCallback {
+
+    /** Flags for the gnssSetCapabilities callback. */
+    @export(name="", value_prefix="GPS_CAPABILITY_")
+    enum Capabilities : @1.0::IGnssCallback.Capabilities {
+        /** GNSS supports line-of-sight satellite identification measurement Corrections */
+        MEASUREMENT_CORRECTIONS_LOS_SATS                        = 1 << 8,
+        /** GNSS supports per satellite excess-path-length measurement Corrections */
+        MEASUREMENT_CORRECTIONS_EXCESS_PATH_LENGTH              = 1 << 10,
+        /** GNSS supports reflecting planes measurement Corrections */
+        MEASUREMENT_CORRECTIONS_REFLECTING_PLANE                = 1 << 20
+    };
+
+    /**
+     * Callback to inform framework of the GNSS engine's capabilities.
+     *
+     * @param capabilities Capability parameter is a bit field of the Capabilities enum.
+     */
+    gnssSetCapabilitiesCb_2_0(bitfield<Capabilities> capabilities);
+
+};
\ No newline at end of file
diff --git a/gnss/2.0/default/Android.bp b/gnss/2.0/default/Android.bp
index 3c55578..bec8260 100644
--- a/gnss/2.0/default/Android.bp
+++ b/gnss/2.0/default/Android.bp
@@ -30,6 +30,7 @@
         "libutils",
         "liblog",
         "android.hardware.gnss@2.0",
+        "android.hardware.gnss.measurement_corrections@1.0",
         "android.hardware.gnss@1.0",
         "android.hardware.gnss@1.1",
     ],
diff --git a/gnss/2.0/default/Gnss.cpp b/gnss/2.0/default/Gnss.cpp
index 1170f73..e21fb17 100644
--- a/gnss/2.0/default/Gnss.cpp
+++ b/gnss/2.0/default/Gnss.cpp
@@ -25,7 +25,8 @@
 namespace V2_0 {
 namespace implementation {
 
-sp<V1_1::IGnssCallback> Gnss::sGnssCallback = nullptr;
+sp<V2_0::IGnssCallback> Gnss::sGnssCallback_2_0 = nullptr;
+sp<V1_1::IGnssCallback> Gnss::sGnssCallback_1_1 = nullptr;
 
 // Methods from V1_0::IGnss follow.
 Return<bool> Gnss::setCallback(const sp<V1_0::IGnssCallback>&) {
@@ -128,23 +129,23 @@
         return false;
     }
 
-    sGnssCallback = callback;
+    sGnssCallback_1_1 = callback;
 
     uint32_t capabilities = 0x0;
-    auto ret = sGnssCallback->gnssSetCapabilitesCb(capabilities);
+    auto ret = sGnssCallback_1_1->gnssSetCapabilitesCb(capabilities);
     if (!ret.isOk()) {
         ALOGE("%s: Unable to invoke callback", __func__);
     }
 
     V1_1::IGnssCallback::GnssSystemInfo gnssInfo = {.yearOfHw = 2019};
 
-    ret = sGnssCallback->gnssSetSystemInfoCb(gnssInfo);
+    ret = sGnssCallback_1_1->gnssSetSystemInfoCb(gnssInfo);
     if (!ret.isOk()) {
         ALOGE("%s: Unable to invoke callback", __func__);
     }
 
     auto gnssName = "Google Mock GNSS Implementation v2.0";
-    ret = sGnssCallback->gnssNameCb(gnssName);
+    ret = sGnssCallback_1_1->gnssNameCb(gnssName);
     if (!ret.isOk()) {
         ALOGE("%s: Unable to invoke callback", __func__);
     }
@@ -180,6 +181,43 @@
     return sp<V2_0::IGnssMeasurement>{};
 }
 
+Return<sp<measurement_corrections::V1_0::IMeasurementCorrections>>
+Gnss::getExtensionMeasurementCorrections() {
+    // TODO implement
+    return sp<measurement_corrections::V1_0::IMeasurementCorrections>{};
+}
+
+Return<bool> Gnss::setCallback_2_0(const sp<V2_0::IGnssCallback>& callback) {
+    ALOGD("Gnss::setCallback_2_0");
+    if (callback == nullptr) {
+        ALOGE("%s: Null callback ignored", __func__);
+        return false;
+    }
+
+    sGnssCallback_2_0 = callback;
+
+    uint32_t capabilities = 0x0;
+    auto ret = sGnssCallback_2_0->gnssSetCapabilitesCb(capabilities);
+    if (!ret.isOk()) {
+        ALOGE("%s: Unable to invoke callback", __func__);
+    }
+
+    V1_1::IGnssCallback::GnssSystemInfo gnssInfo = {.yearOfHw = 2019};
+
+    ret = sGnssCallback_2_0->gnssSetSystemInfoCb(gnssInfo);
+    if (!ret.isOk()) {
+        ALOGE("%s: Unable to invoke callback", __func__);
+    }
+
+    auto gnssName = "Google Mock GNSS Implementation v2.0";
+    ret = sGnssCallback_2_0->gnssNameCb(gnssName);
+    if (!ret.isOk()) {
+        ALOGE("%s: Unable to invoke callback", __func__);
+    }
+
+    return true;
+}
+
 }  // namespace implementation
 }  // namespace V2_0
 }  // namespace gnss
diff --git a/gnss/2.0/default/Gnss.h b/gnss/2.0/default/Gnss.h
index 17e439f..7f14513 100644
--- a/gnss/2.0/default/Gnss.h
+++ b/gnss/2.0/default/Gnss.h
@@ -73,9 +73,13 @@
 
     // Methods from V2_0::IGnss follow.
     Return<sp<V2_0::IGnssMeasurement>> getExtensionGnssMeasurement_2_0() override;
+    Return<bool> setCallback_2_0(const sp<V2_0::IGnssCallback>& callback) override;
+    Return<sp<measurement_corrections::V1_0::IMeasurementCorrections>>
+    getExtensionMeasurementCorrections() override;
 
    private:
-    static sp<V1_1::IGnssCallback> sGnssCallback;
+    static sp<V2_0::IGnssCallback> sGnssCallback_2_0;
+    static sp<V1_1::IGnssCallback> sGnssCallback_1_1;
 };
 
 }  // namespace implementation
@@ -84,4 +88,4 @@
 }  // namespace hardware
 }  // namespace android
 
-#endif  // ANDROID_HARDWARE_GNSS_V2_0_GNSS_H
+#endif  // ANDROID_HARDWARE_GNSS_V2_0_GNSS_H
\ No newline at end of file
diff --git a/gnss/2.0/vts/functional/Android.bp b/gnss/2.0/vts/functional/Android.bp
index 7db142f..894716d 100644
--- a/gnss/2.0/vts/functional/Android.bp
+++ b/gnss/2.0/vts/functional/Android.bp
@@ -23,6 +23,7 @@
         "VtsHalGnssV2_0TargetTest.cpp",
     ],
     static_libs: [
+        "android.hardware.gnss.measurement_corrections@1.0",
         "android.hardware.gnss@1.0",
         "android.hardware.gnss@1.1",
         "android.hardware.gnss@2.0",
diff --git a/gnss/measurement_corrections/1.0/Android.bp b/gnss/measurement_corrections/1.0/Android.bp
new file mode 100644
index 0000000..237b008
--- /dev/null
+++ b/gnss/measurement_corrections/1.0/Android.bp
@@ -0,0 +1,25 @@
+// This file is autogenerated by hidl-gen -Landroidbp.
+
+hidl_interface {
+    name: "android.hardware.gnss.measurement_corrections@1.0",
+    root: "android.hardware",
+    vndk: {
+        enabled: true,
+    },
+    srcs: [
+        "types.hal",
+        "IMeasurementCorrections.hal",
+    ],
+    interfaces: [
+        "android.hardware.gnss@1.0",
+        "android.hidl.base@1.0",
+    ],
+    types: [
+        "GnssSingleSatCorrectionFlags",
+        "MeasurementCorrections",
+        "ReflectingPlane",
+        "SingleSatCorrection",
+    ],
+    gen_java: true,
+}
+
diff --git a/gnss/measurement_corrections/1.0/IMeasurementCorrections.hal b/gnss/measurement_corrections/1.0/IMeasurementCorrections.hal
new file mode 100644
index 0000000..934d10f
--- /dev/null
+++ b/gnss/measurement_corrections/1.0/IMeasurementCorrections.hal
@@ -0,0 +1,39 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.hardware.gnss.measurement_corrections@1.0;
+
+/**
+ * Interface for measurement corrections support.
+ */
+interface IMeasurementCorrections {
+
+    /**
+     * Injects measurement corrections to be used by the HAL to improve the GNSS location output.
+     *
+     * These are NOT to be used to adjust the IGnssMeasurementCallback output values -
+     * those remain raw, uncorrected measurements.
+     *
+     * In general, these are injected when conditions defined by the platform are met, such as when
+     * GNSS Location is being requested at a sufficiently high accuracy, based on the capabilities
+     * of the GNSS chipset as reported in the IGnssCallback.
+     *
+     * @param corrections The computed corrections to be used by the HAL.
+     *
+     * @return success Whether the HAL can accept & use these corrections.
+     */
+     setCorrections(MeasurementCorrections corrections) generates (bool success);
+};
diff --git a/gnss/measurement_corrections/1.0/types.hal b/gnss/measurement_corrections/1.0/types.hal
new file mode 100644
index 0000000..192bec9
--- /dev/null
+++ b/gnss/measurement_corrections/1.0/types.hal
@@ -0,0 +1,125 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.hardware.gnss.measurement_corrections@1.0;
+
+import android.hardware.gnss@1.0::GnssConstellationType;
+
+/**
+ * A struct with measurement corrections for a single visible satellites
+ *
+ * The bit mask singleSatCorrectionFlags indicates which correction values are valid in the struct
+ */
+struct SingleSatCorrection {
+
+    /** Contains GnssSingleSatCorrectionFlags bits. */
+    bitfield<GnssSingleSatCorrectionFlags> singleSatCorrectionFlags;
+
+    /**
+     * Defines the constellation of the given satellite.
+     */
+    GnssConstellationType constellation;
+
+    /**
+     * Satellite vehicle ID number, as defined in GnssSvInfo::svid
+     */
+    uint16_t svid;
+
+    /**
+     * Carrier frequency of the signal to be corrected, for example it can be the
+     * GPS center frequency for L1 = 1,575,420,000 Hz, varying GLO channels, etc.
+     *
+     * For a receiver with capabilities to track multiple frequencies for the same satellite,
+     * multiple corrections for the same satellite may be provided.
+     */
+    float carrierFrequencyHz;
+
+    /** True if the satellite is in Line-of-Sight condition */
+    bool satIsLos;
+
+    /**
+     * Excess path length to be subtracted from pseudorange before using it in calculating location.
+     *
+     * Note this value is NOT to be used to adjust the GnssMeasurementCallback outputs.
+     */
+    float excessPathLengthMeters;
+
+    /** Error estimate (1-sigma) for the Excess path length estimate */
+    float excessPathLengthUncertaintyMeters;
+
+    /** Defines the reflecting plane location and azimuth information */
+    ReflectingPlane reflectingPlance;
+};
+
+/**
+ * A struct containing a set of measurement corrections for all used GNSS satellites at the location
+ * specified by latitudeDegrees, longitudeDegrees, altitudeMeters and at the time of week specified
+ * toaGpsNanosecondsOfWeek
+ */
+struct MeasurementCorrections {
+    /** Represents latitude in degrees. */
+    double latitudeDegrees;
+
+    /** Represents longitude in degrees. */
+    double longitudeDegrees;
+
+    /**
+     * Represents altitude in meters above the WGS 84 reference ellipsoid.
+     */
+    double altitudeMeters;
+
+    /** Time Of Applicability, GPS time of week */
+    uint64_t toaGpsNanosecondsOfWeek;
+
+    /**
+     * A set of SingleSatCorrection each containing measurement corrections for a satellite in view
+     */
+    vec<SingleSatCorrection> satCorrections;
+};
+
+/**
+ * A struct containing the location and azimuth of the reflecting plane that the satellite signal
+ * has bounced from.
+ *
+ * This field is set only if the signal has bounced only once.
+ */
+struct ReflectingPlane {
+    /** Represents latitude of the reflecting plane in degrees. */
+    double latitudeDegrees;
+
+    /** Represents longitude of the reflecting plane in degrees. */
+    double longitudeDegrees;
+
+    /**
+     * Represents altitude of the reflecting plane in meters above the WGS 84 reference ellipsoid.
+     */
+    double altitudeMeters;
+
+    /** Represents azimuth clockwise from north of the reflecting plane in degrees. */
+    double azimuthDegrees;
+};
+
+/** Bit mask to indicate which values are valid in a SingleSatCorrection object. */
+enum GnssSingleSatCorrectionFlags : uint16_t {
+    /** GnssSingleSatCorrectionFlags has valid satellite-is-line-of-sight field. */
+    HAS_SAT_IS_LOS                           = 0x0001,
+    /** GnssSingleSatCorrectionFlags has valid Excess Path Length field. */
+    HAS_EXCESS_PATH_LENGTH                   = 0x0002,
+    /** GnssSingleSatCorrectionFlags has valid Excess Path Length Uncertainty field. */
+    HAS_EXCESS_PATH_LENGTH_UNC               = 0x0004,
+    /** GnssSingleSatCorrectionFlags has valid Reflecting Plane field. */
+    HAS_REFLECTING_PLANE                     = 0x0008
+};
\ No newline at end of file
diff --git a/thermal/2.0/types.hal b/thermal/2.0/types.hal
index 4929e44..ad11849 100644
--- a/thermal/2.0/types.hal
+++ b/thermal/2.0/types.hal
@@ -48,27 +48,33 @@
      * Not under throttling.
      */
     NONE = 0,
+
     /**
      * Light throttling where UX is not impacted.
      */
     LIGHT,
+
     /**
-     * Moderate throttling where UX is not largily impacted.
+     * Moderate throttling where UX is not largely impacted.
      */
     MODERATE,
+
     /**
      * Severe throttling where UX is largely impacted.
      * Similar to 1.0 throttlingThreshold.
      */
     SEVERE,
+
     /**
      * Platform has done everything to reduce power.
      */
     CRITICAL,
+
     /**
      * User should be warned before shutdown.
      */
     WARNING,
+
     /**
      * Need shutdown immediately.
      */