Does anyone out there know what project is being done by the helicopters which are buzzing the Santa Teresa Hills 7 days a week? How long will it last?

This has been going on for several months now and we have not been provided with any information by any company or entity. The helicopters begin at 7am every weekday and at 7:30am Saturdays, 8:30am Sundays.

Does the constant noise annoy any of you?