# Code table 4.11 - Type of time intervals
0 0 Reserved 
1 1 Successive times processed have same forecast time, start time of forecast is incremented 
2 2 Successive times processed have same start time of forecast, forecast time is incremented 
3 3 Successive times processed have start time of forecast incremented and forecast time decremented so that valid time remains constant 
4 4 Successive times processed have start time of forecast decremented and forecast time incremented so that valid time remains constant 
5 5 Floating subinterval of time between forecast time and end of overall time interval 
# 6-191 Reserved 
# 192-254 Reserved for local use 
255 255 Missing