You can use this page to check on the status of your Top 15 - come back from time to time and see how it's progressing. The time between receiving it and transmission depends on a number of factors, not least how many we have pending and how quickly we can find the tracks. Status conditions are:

Received: We've got it!
Pending: We're looking for the tracks
In Production: It is being prepared for transmission
Completed: Ready for transmission - look below for schedule