Initial implementation of parsing PPBB blocks

lib/xmet/raob.py

@@ -372,6 +372,44 @@ class RAOBObs():
             'samples':   samples
         }
 
+    def parse_ppbb_samples(self, tokens: list[str]) -> dict:
+        heights = tokens[0]
+
+        if heights[0] != '9':
+            return dict()
+
+        tens = int(heights[1])
+        h1   = (10000 * tens) + (1000 * int(heights[2]))
+        h2   = (10000 * tens) + (1000 * int(heights[3]))
+        h3   = (10000 * tens) + (1000 * int(heights[4]))
+
+        return {
+            h1: self.parse_wind(tokens[1]),
+            h2: self.parse_wind(tokens[2]),
+            h3: self.parse_wind(tokens[3])
+        }
+
+    def parse_ppbb(self) -> dict:
+        timestamp = self.tokens[0]
+        station   = self.tokens[1]
+        samples   = list()
+
+        for i in range(2, len(self.tokens), 4):
+            data = self.parse_ppbb_samples(self.tokens[i:i+4])
+
+            for height in data:
+                samples.append({
+                    'height':     height,
+                    'wind_speed': data[height]['speed'],
+                    'wind_dir':   data[height]['dir']
+                })
+
+        return {
+            'station':   station,
+            'timestamp': timestamp,
+            'samples':   samples
+        }
+
 class RAOBChunk():
     def __init__(self,
                  wfo:     str,