Merge branch 'SHU-obsrio' into 'master'

add SHU volt/bin constants

See merge request !132

geomagio/Metadata.py

@@ -175,6 +175,29 @@ _INSTRUMENT_METADATA = [
             },
         },
     },
+    {
+        "network": "NT",
+        "station": "SHU",
+        "start_time": None,
+        "end_time": None,
+        "instrument": {
+            "type": "Narod",
+            "channels": {
+                "U": [
+                    {"channel": "U_Volt", "offset": 0, "scale": 100},
+                    {"channel": "U_Bin", "offset": 0, "scale": 505},
+                ],
+                "V": [
+                    {"channel": "V_Volt", "offset": 0, "scale": 100},
+                    {"channel": "V_Bin", "offset": 0, "scale": 505},
+                ],
+                "W": [
+                    {"channel": "W_Volt", "offset": 0, "scale": 100},
+                    {"channel": "W_Bin", "offset": 0, "scale": 505},
+                ],
+            },
+        },
+    },
     {
         "network": "NT",
         "station": "SJT",