aggregateTo.88: Aggregate hourly data to daily from 8am to 8am the next day
In KNMI/Hackathon-RDWD-QualityMonitoring: What the package does (short line)

Rain is measured hourly in the automatic weather stations, this needs to be converted to sums from 8 am to 8 am on the next day.

1 2	aggregateTo.88(obj, all.stations = TRUE, sta_type = "AWS", var_id = "RH", sta_id = NULL)

`obj`	The R object containing all timeseries and metadata
`all.stations`	default is "TRUE" means all stations are aggregated. If all.stations = FALSE, an array of sta_ID needs to be provided.
`sta_type`	default is "AWS", but could be extended to for instance "WOW" in the future.
`var_id`	default is "RH" for hourly rainfall.
`sta_id`	defines the string of sta_id's that need to be aggregated. Only applies when all.stations = FALSE. #@example aggregated88 <- aggregate.to.88(obj=obj)