 1952 - Khartoum, Sudan 
This was a joint HAO – Naval Research Laboratory expedition, which obtained 50 spectra of the eclipse features of the sun.1958 – Pukapuka, Cook Islands in the Pacific
This was a joint HAO – Sacramento Peak expedition that was unable to obtain a single photo due to rainstorms.1959 – Fuertaventura, Canary Islands of Spain
A joint HAO – Sacramento Peak expedition

1962 – Lae, New Guinea

1963 – Alaska and Canada

1965 – Bellingshausen Island, South Pacific

1966 – Pulacayo, Bolivia

1970 - San Carlos Youtepec, Mexico

1972 – Cap Chat, Canada

1973 – Loiengalani, Kenya

1980 – Palem, India
HAO in collaboration with Southwestern at Memphis College, Tennessee

1981 – Tarma, Siberia, USSR
HAO in collaboration with the Astronomical Council of the Academy of Sciences of the USSR, Moscow

1983 – Tanjung Kodok, Indonesia

1988 - Mindanao, Philippines
In Provocation No.