Just posting this for the non-NOTAM readers out there who will be flying in the St. Louis area between 8/10-21:
https://www.faasafety.gov/files/notices/2015/Aug/BOEING_15-02_GPS__Flight_Advisory.pdf
https://www.faasafety.gov/files/notices/2015/Aug/BOEING_15-02_GPS__Flight_Advisory.pdf