[b] added 15min timedelta to transmissions

FHSTP/prep.py

@@ -14,6 +14,7 @@ import datetime
 
 import numpy as np
 import pandas as pd
+from pandas.tseries.offsets import Minute
 
 
 def parse_arguments() -> argparse.Namespace:
@@ -455,6 +456,10 @@ def prep() -> None:
     df_link['BEGINTIME'] = df_link['BEGINTIME'].dt.tz_localize('Europe/Vienna').dt.tz_convert('UTC').dt.tz_localize(None)
     _log('Converted BEGINTIME to UTC')
     
+    # fix 15min time-lag in transmissions
+    df_link['BEGINTIME'] = df_link['BEGINTIME'] - pd.Timedelta(15, unit = 'min')
+    _log('Fixed 15min timelag in transmissions')
+    
     # only use transmissions with begintime matching INCA date
     date_inca = np.datetime64(f'{str(dir_inca.stem)[0:4]}-{str(dir_inca.stem)[-4:-2]}-{str(dir_inca.stem)[-2:]}')
     df_link = df_link[df_link['BEGINTIME'].dt.date == date_inca]