diff --git a/Arduino15/packages/SPRESENSE/hardware/spresense/1.0.0/libraries/GNSS/GNSS.cpp b/Arduino15/packages/SPRESENSE/hardware/spresense/1.0.0/libraries/GNSS/GNSS.cpp
index ed08d19f..19bec76e 100644
--- a/Arduino15/packages/SPRESENSE/hardware/spresense/1.0.0/libraries/GNSS/GNSS.cpp
+++ b/Arduino15/packages/SPRESENSE/hardware/spresense/1.0.0/libraries/GNSS/GNSS.cpp
@@ -858,6 +858,19 @@ int SpGnss::saveEphemeris(void)
     return ret;
 }
 
+/**
+ * @brief Remove the backup data stored in the Flash
+ * @return 0 if success, -1 if failure
+ */
+int SpGnss::removeEphemeris(void)
+{
+#ifdef CONFIG_CXD56_GNSS_BACKUP_FILENAME
+    return unlink(CONFIG_CXD56_GNSS_BACKUP_FILENAME);
+#else
+    return -1;
+#endif
+}
+
 /**
  * @brief Get the QZQSM DC report data
  * @return the pointer to DC Report structure if valid, otherwise NULL
diff --git a/Arduino15/packages/SPRESENSE/hardware/spresense/1.0.0/libraries/GNSS/GNSS.h b/Arduino15/packages/SPRESENSE/hardware/spresense/1.0.0/libraries/GNSS/GNSS.h
index ff03f338..b74104d0 100644
--- a/Arduino15/packages/SPRESENSE/hardware/spresense/1.0.0/libraries/GNSS/GNSS.h
+++ b/Arduino15/packages/SPRESENSE/hardware/spresense/1.0.0/libraries/GNSS/GNSS.h
@@ -437,6 +437,12 @@ class SpGnss
      */
     int saveEphemeris(void);
 
+    /**
+     * @brief Remove the backup data stored in the Flash
+     * @return 0 if success, -1 if failure
+     */
+    int removeEphemeris(void);
+
     /**
      * @brief Get the QZQSM DC report data
      * @return the pointer to DC Report structure if valid, otherwise NULL