| 1952 | Khartoum, Sudan | In collaboration with the Naval Research Laboratory |
| 1963 | Sourdough, Alaska | |
| 1965 | Bellingshausen Island, the South Pacific | |
| 1966 | Pulacayo, Bolivia | |
| 1970 | San Carlos Youtepec, Mexico | |
| 1972 | Cap Chat, Canada | |
| 1973 | Loiengalani, Kenya | |
| 1980 | Palem, India | In collaboration with Southwestern at Memphis College,Tennessee |
| 1981 | Tarma, Siberia, USSR | In collaboration with the Astronomical Council of the Academy of Sciences of the USSR, Moscow |
| 1983 | Tanjung Kodok, Indonesia | |
| 1988 | Mindanao, Phillipines | |
| 1991 | Mauna Loa, Hawaii | In collaboration with Rhodes College, Tennessee |
| 1994 | Putre, Chile | |
| 1998 | Curacao, Dutch Antilles |
-Revised 11 February 2000 by
cmw@ucar.edu.
-Approved by Tom Bogdan.
Copyright 2000