One of the sad things about our hobby is that we losing many of the pioneers and researchers that have made this hobby so fascinating.
From my personal observations, Pat had dedicated his entire life to the research of VHF Propagation, especially Sporadic Es. To the best of my knowledge, he was contributing up to the last minutes of his life.
Pat's family appeared to be only VHF/UHF propagation research. His family in VHF/UHF/WeakSignal are going to miss him for a long time.
Pat should be considered the Father of Sporadic Es. He was very instrumental in identifying the "Diurnal" patterns with this propagation phenomena.
Most of my first draft Papers and Blog postings concerning multi-year observations and analyses were sent to Pat for his comment and feedback.
If anyone wants to understand Es more, you have to visit his website. He maintained some absolute meticulous records. I wish I had done the same, but getting married twice and four re-locations resulted in a loss of most of my records.