In 1987 and 1989, Robert H. Gray listened for the signal using the META array at Oak Ridge Observatory, but did not hear it.  In a July 1995 test of signal detection software to be used in its upcoming Project Argus, SETI League executive director H. Paul Shuch made several observations of the Wow! signal's place in the sky with a 12-meter radio telescope at the National Radio Astronomy Observatory in Green Bank, West Virginia, also never hearing anything.