Added parameter passing of datetime

ogn/gateway/process.py

@@ -14,11 +14,11 @@ def replace_lonlat_with_wkt(message):
     return message
 
 
-def process_beacon(raw_message):
+def process_beacon(raw_message, reference_date=None):
     if raw_message[0] == '#':
         return
     try:
-        message = parse_aprs(raw_message)
+        message = parse_aprs(raw_message, reference_date)
 
         # symboltable / symbolcodes used by OGN:
         # I&: used as receiver