Use of seconds in date_to_number function

[ecaas]

The date_to_number function takes in an array of length 6, expecting (year,month,day,hour,minute,second) to calculate days since a given reference year.

The first dimension of date_data array is also length 6, however the 6th item is "datenum", not seconds. This can easily cause confusion if date_data is used in the date_to_number function. It is also not consistent with NORTRIP_multiroad, where the 6th item of the first dimension of date_data is seconds.