[AMM]

Ground schedule is usually associated to rate service by the repetition schedule service - specify the rate service type as "GROUNDSCHEDULE" and in rate service details, insert the repetition schedule service. This will link your ground schedule to a rate service when planning is considering the schedule.

However, for static trips, (from the OTM help) "Static Trips: Used for creating empty shipments for a predetermined route and then moving order releases on to those shipments. It involves setting up a trip template and specifying all the trip stop times for the template"
i.e. if you specify all of the trip stop times, you don't need a rate service.