Implement extracting RT130 GPS data

#19 (closed)

sohstationviewer/model/reftek/reftek.py

@@ -416,13 +416,13 @@ class RT130(DataTypeModel):
         # height value.
         # Start pass the end of the string and look backward one index every
         # iteration so we don't have to add 1 to the final index.
-        i = len(height_str)
-        current_char = height_str[i - 1]
+        current_idx = len(height_str)
+        current_char = height_str[current_idx - 1]
         while current_char != '.' and not current_char.isnumeric():
-            i -= 1
-            current_char = height_str[i - 1]
-        height = float(height_str[:i])
-        height_unit = height_str[i:]
+            current_idx -= 1
+            current_char = height_str[current_idx - 1]
+        height = float(height_str[:current_idx])
+        height_unit = height_str[current_idx:]
 
         return GPSPoint(gps_time, fix_type, num_sats_used, lat, long, height,
                         height_unit)