Implement parsing for pressure heights

lib/xmet/rawins.py

@@ -38,6 +38,20 @@ class RawinsObs():
         'TTAA': lambda n: n * 100
     }
 
+    TTAA_HEIGHTS = {
+        '00': 1000,
+        '92':  925,
+        '85':  850,
+        '70':  700,
+        '50':  500,
+        '40':  400,
+        '30':  300,
+        '25':  250,
+        '20':  200,
+        '15':  150,
+        '10':  100,
+    }
+
     def parse_timestamp(self, value: str):
         day  = int(value[0:2]) - 50
         hour = int(value[2:4])
@@ -87,6 +101,15 @@ class RawinsObs():
             'speed': float(value[4:]) + base_speed
         }
 
+    def parse_height_pressure(self, value: str):
+        token = value[0:2]
+
+        if token in self.TTAA_HEIGHTS:
+            return {
+                'height':   self.TTAA_HEIGHTS[token],
+                'pressure': float(value[2:5])
+            }
+
     def parse_ttaa(self):
         pass