diff --git a/eoreader/products/sar/rcm_product.py b/eoreader/products/sar/rcm_product.py
index bc4f4567..43241886 100644
--- a/eoreader/products/sar/rcm_product.py
+++ b/eoreader/products/sar/rcm_product.py
@@ -228,7 +228,7 @@ def _set_product_type(self) -> None:
         """Set products type"""
         # Get MTD XML file
         root, nsmap = self.read_mtd()
-        namespace = nsmap[None]
+        namespace = nsmap.get(None, "")
 
         # Open identifier
         prod_type = root.findtext(f".//{namespace}productType")
@@ -263,7 +263,7 @@ def _set_sensor_mode(self) -> None:
         """
         # Get metadata
         root, nsmap = self.read_mtd()
-        namespace = nsmap[None]
+        namespace = nsmap.get(None, "")
 
         # Get sensor mode
         # WARNING: this word may differ from the Enum !!! (no docs available)
@@ -303,7 +303,7 @@ def get_datetime(self, as_datetime: bool = False) -> Union[str, datetime]:
         """
         # Get MTD XML file
         root, nsmap = self.read_mtd()
-        namespace = nsmap[None]
+        namespace = nsmap.get(None, "")
 
         # Open identifier
         acq_date = root.findtext(f".//{namespace}rawDataStartTime")
@@ -426,7 +426,7 @@ def get_orbit_direction(self) -> OrbitDirection:
         """
         # Get MTD XML file
         root, nsmap = self.read_mtd()
-        namespace = nsmap[None]
+        namespace = nsmap.get(None, "")
 
         # Get the orbit direction
         try:
diff --git a/eoreader/products/sar/rs2_product.py b/eoreader/products/sar/rs2_product.py
index ab8748d3..5b4859a8 100644
--- a/eoreader/products/sar/rs2_product.py
+++ b/eoreader/products/sar/rs2_product.py
@@ -379,7 +379,7 @@ def _pre_init(self, **kwargs) -> None:
 
         # SNAP can process non-complex archive
         root, nsmap = self.read_mtd()
-        namespace = nsmap[None]
+        namespace = nsmap.get(None, "")
 
         # Open identifier
         prod_type = root.findtext(f".//{namespace}productType")
@@ -458,7 +458,7 @@ def _set_sensor_mode(self) -> None:
         """
         # Get metadata
         root, nsmap = self.read_mtd()
-        namespace = nsmap[None]
+        namespace = nsmap.get(None, "")
 
         # Get sensor mode
         # WARNING: this word may differ from the Enum !!! (no docs available)
@@ -499,7 +499,7 @@ def get_datetime(self, as_datetime: bool = False) -> Union[str, datetime]:
         if self.datetime is None:
             # Get MTD XML file
             root, nsmap = self.read_mtd()
-            namespace = nsmap[None]
+            namespace = nsmap.get(None, "")
 
             # Open identifier
             acq_date = root.findtext(f".//{namespace}rawDataStartTime")
@@ -596,7 +596,7 @@ def get_orbit_direction(self) -> OrbitDirection:
         """
         # Get MTD XML file
         root, nsmap = self.read_mtd()
-        namespace = nsmap[None]
+        namespace = nsmap.get(None, "")
 
         # Get the orbit direction
         try: