diff --git a/geomagio/ObservatoryMetadata.py b/geomagio/ObservatoryMetadata.py
index 735a232998d7deb57a7ed7a766c5c33b6e1b9528..73b3f1e8d8d288499b8c4e2b765a2d18c7d41fa4 100644
--- a/geomagio/ObservatoryMetadata.py
+++ b/geomagio/ObservatoryMetadata.py
@@ -38,7 +38,7 @@ DEFAULT_METADATA = {
             "geodetic_latitude": "40.137",
             "geodetic_longitude": "254.763",
             "elevation": "1682",
-            "sensor_orientation": "HDZF",
+            "sensor_orientation": "HDZ",
             "sensor_sampling_rate": 100.0,
             "declination_base": 5527,
             "is_gin": False,
@@ -57,7 +57,7 @@ DEFAULT_METADATA = {
             "geodetic_latitude": "40.137",
             "geodetic_longitude": "254.763",
             "elevation": "1682",
-            "sensor_orientation": "HDZF",
+            "sensor_orientation": "HDZ",
             "sensor_sampling_rate": 100.0,
             "declination_base": 5527,
             "is_gin": False,
@@ -76,7 +76,7 @@ DEFAULT_METADATA = {
             "geodetic_latitude": "40.137",
             "geodetic_longitude": "254.763",
             "elevation": "1682",
-            "sensor_orientation": "HDZF",
+            "sensor_orientation": "HDZ",
             "sensor_sampling_rate": 10000.0,
             "declination_base": 5527,
             "is_gin": False,
@@ -95,7 +95,7 @@ DEFAULT_METADATA = {
             "geodetic_latitude": "71.322",
             "geodetic_longitude": "203.378",
             "elevation": "10",
-            "sensor_orientation": "HDZF",
+            "sensor_orientation": "HDZ",
             "sensor_sampling_rate": 100.0,
             "declination_base": 10589,
             "is_gin": False,
@@ -114,7 +114,7 @@ DEFAULT_METADATA = {
             "geodetic_latitude": "71.322",
             "geodetic_longitude": "203.378",
             "elevation": "10",
-            "sensor_orientation": "HDZF",
+            "sensor_orientation": "HDZ",
             "sensor_sampling_rate": 10000.0,
             "declination_base": 10589,
             "is_gin": False,
@@ -133,7 +133,7 @@ DEFAULT_METADATA = {
             "geodetic_latitude": "30.350",
             "geodetic_longitude": "270.365",
             "elevation": "8",
-            "sensor_orientation": "HDZF",
+            "sensor_orientation": "HDZ",
             "sensor_sampling_rate": 100.0,
             "declination_base": 215772,
             "is_gin": False,
@@ -152,7 +152,7 @@ DEFAULT_METADATA = {
             "geodetic_latitude": "64.874",
             "geodetic_longitude": "212.140",
             "elevation": "197",
-            "sensor_orientation": "HDZF",
+            "sensor_orientation": "HDZ",
             "sensor_sampling_rate": 100.0,
             "declination_base": 12151,
             "is_gin": False,
@@ -171,7 +171,7 @@ DEFAULT_METADATA = {
             "geodetic_latitude": "64.874",
             "geodetic_longitude": "212.140",
             "elevation": "197",
-            "sensor_orientation": "HDZF",
+            "sensor_orientation": "HDZ",
             "sensor_sampling_rate": 10000.0,
             "declination_base": 12151,
             "is_gin": False,
@@ -190,7 +190,7 @@ DEFAULT_METADATA = {
             "geodetic_latitude": "70.355",
             "geodetic_longitude": "211.207",
             "elevation": "10",
-            "sensor_orientation": "HDZF",
+            "sensor_orientation": "HDZ",
             "sensor_sampling_rate": 100.0,
             "declination_base": 10755,
             "is_gin": False,
@@ -209,7 +209,7 @@ DEFAULT_METADATA = {
             "geodetic_latitude": "70.355",
             "geodetic_longitude": "211.207",
             "elevation": "10",
-            "sensor_orientation": "HDZF",
+            "sensor_orientation": "HDZ",
             "sensor_sampling_rate": 10000.0,
             "declination_base": 10755,
             "is_gin": False,
@@ -228,7 +228,7 @@ DEFAULT_METADATA = {
             "geodetic_latitude": "38.205",
             "geodetic_longitude": "282.627",
             "elevation": "69",
-            "sensor_orientation": "HDZF",
+            "sensor_orientation": "HDZ",
             "sensor_sampling_rate": 100.0,
             "declination_base": 209690,
             "is_gin": False,
@@ -247,7 +247,7 @@ DEFAULT_METADATA = {
             "geodetic_latitude": "38.205",
             "geodetic_longitude": "282.627",
             "elevation": "69",
-            "sensor_orientation": "HDZF",
+            "sensor_orientation": "HDZ",
             "sensor_sampling_rate": 100.0,
             "declination_base": 209690,
             "is_gin": False,
@@ -266,7 +266,7 @@ DEFAULT_METADATA = {
             "geodetic_latitude": "37.091",
             "geodetic_longitude": "240.282",
             "elevation": "331",
-            "sensor_orientation": "HDZF",
+            "sensor_orientation": "HDZ",
             "sensor_sampling_rate": 100.0,
             "declination_base": 8097,
             "is_gin": False,
@@ -285,7 +285,7 @@ DEFAULT_METADATA = {
             "geodetic_latitude": "13.588",
             "geodetic_longitude": "144.867",
             "elevation": "140",
-            "sensor_orientation": "HDZF",
+            "sensor_orientation": "HDZ",
             "sensor_sampling_rate": 100.0,
             "declination_base": 764,
             "is_gin": False,
@@ -304,7 +304,7 @@ DEFAULT_METADATA = {
             "geodetic_latitude": "13.588",
             "geodetic_longitude": "144.867",
             "elevation": "140",
-            "sensor_orientation": "HDZF",
+            "sensor_orientation": "HDZ",
             "sensor_sampling_rate": 100.0,
             "declination_base": 764,
             "is_gin": False,
@@ -323,7 +323,7 @@ DEFAULT_METADATA = {
             "geodetic_latitude": "21.316",
             "geodetic_longitude": "202.000",
             "elevation": "4",
-            "sensor_orientation": "HDZF",
+            "sensor_orientation": "HDZ",
             "sensor_sampling_rate": 100.0,
             "declination_base": 5982,
             "is_gin": False,
@@ -342,7 +342,7 @@ DEFAULT_METADATA = {
             "geodetic_latitude": "21.316",
             "geodetic_longitude": "202.000",
             "elevation": "4",
-            "sensor_orientation": "HDZF",
+            "sensor_orientation": "HDZ",
             "sensor_sampling_rate": 100.0,
             "declination_base": 5982,
             "is_gin": False,
@@ -361,7 +361,7 @@ DEFAULT_METADATA = {
             "geodetic_latitude": "36.232",
             "geodetic_longitude": "140.186",
             "elevation": "36",
-            "sensor_orientation": "HDZF",
+            "sensor_orientation": "HDZ",
             "reported": "HDZF",
             "sensor_sampling_rate": 0.01,
             "declination_base": None,
@@ -381,7 +381,7 @@ DEFAULT_METADATA = {
             "geodetic_latitude": "48.265",
             "geodetic_longitude": "242.878",
             "elevation": "770",
-            "sensor_orientation": "HDZF",
+            "sensor_orientation": "HDZ",
             "sensor_sampling_rate": 100.0,
             "declination_base": 9547,
             "is_gin": False,
@@ -400,7 +400,7 @@ DEFAULT_METADATA = {
             "geodetic_latitude": "55.348",
             "geodetic_longitude": "199.538",
             "elevation": "80",
-            "sensor_orientation": "HDZF",
+            "sensor_orientation": "HDZ",
             "sensor_sampling_rate": 100.0,
             "declination_base": 7386,
             "is_gin": False,
@@ -419,7 +419,7 @@ DEFAULT_METADATA = {
             "geodetic_latitude": "57.058",
             "geodetic_longitude": "224.675",
             "elevation": "24",
-            "sensor_orientation": "HDZF",
+            "sensor_orientation": "HDZ",
             "sensor_sampling_rate": 100.0,
             "declination_base": 12349,
             "is_gin": False,
@@ -438,7 +438,7 @@ DEFAULT_METADATA = {
             "geodetic_latitude": "18.113",
             "geodetic_longitude": "293.849",
             "elevation": "424",
-            "sensor_orientation": "HDZF",
+            "sensor_orientation": "HDZ",
             "sensor_sampling_rate": 100.0,
             "declination_base": 208439,
             "is_gin": False,
@@ -457,7 +457,7 @@ DEFAULT_METADATA = {
             "geodetic_latitude": "18.113",
             "geodetic_longitude": "293.849",
             "elevation": "424",
-            "sensor_orientation": "HDZF",
+            "sensor_orientation": "HDZ",
             "sensor_sampling_rate": 100.0,
             "declination_base": 208439,
             "is_gin": False,
@@ -476,7 +476,7 @@ DEFAULT_METADATA = {
             "geodetic_latitude": "32.174",
             "geodetic_longitude": "249.267",
             "elevation": "946",
-            "sensor_orientation": "HDZF",
+            "sensor_orientation": "HDZ",
             "sensor_sampling_rate": 100.0,
             "declination_base": 5863,
             "is_gin": False,
@@ -495,7 +495,7 @@ DEFAULT_METADATA = {
             "geodetic_latitude": "40.137",
             "geodetic_longitude": "254.764",
             "elevation": "1682",
-            "sensor_orientation": "HDZF",
+            "sensor_orientation": "HDZ",
             "sensor_sampling_rate": 100.0,
             "declination_base": None,
             "is_gin": False,
@@ -614,7 +614,7 @@ DEFAULT_METADATA = {
             "geodetic_latitude": "51.000",
             "geodetic_longitude": "355.500",
             "elevation": "0",
-            "sensor_orientation": "HDZF",
+            "sensor_orientation": "HDZ",
             "reported": "HDZF",
             "sensor_sampling_rate": 100.0,
             "declination_base": None,
@@ -634,7 +634,7 @@ DEFAULT_METADATA = {
             "geodetic_latitude": "-34.400",
             "geodetic_longitude": "19.200",
             "elevation": "0",
-            "sensor_orientation": "HDZF",
+            "sensor_orientation": "HDZ",
             "reported": "HDZF",
             "sensor_sampling_rate": 100.0,
             "declination_base": None,