Abstract: Prior to the NASA Glenn Research Center 9- by 15-Foot Low-Speed Wind Tunnel (9×15 LSWT) undergoing significant structural and acoustic modifications beginning in 2017, a flow quality survey (FQS) was conducted to characterize the flow quality of the 8- by 6-Foot Supersonic Wind Tunnel (8×6 SWT) test section and facility air dryer. The data from this FQS will be compared to data collected during a FQS following the completion of the 9×15 LSWT Acoustic Improvement Modifications. This document c…