 214, Dr. Roberts discusses the High Altitude Observatory (HAO) expedition to the Philippines to observe the eclipse of March 18.HAO expedition staff included Dick Fisher, Kristy Rock, Mike McGrath, and Lee Lacey.1991 - Mauna Loa, Hawaii
HAO in collaboration with Rhodes College, Tennessee

1994 - Putre, Chile

1998 – Curaçao, Dutch Antilles

2012 – Palm Cove, Queensland, Australia

2017 - Preparing for the 2017 Eclipse

Walter Orr Roberts was a graduate student under Donald Menzel at Harvard, and helped him set up a solar telescope at the Oak Ridge Station of Harvard College Observatory.