[1] Citron helped establish and manage the Smithsonian Astrophysical Observatory's Operation Moonwatch and Precision Optical Satellite Tracking Programs (STP) after the launch of Sputnik I in 1957.
Citron worked for the Smithsonian Institution for 17 years, establishing satellite tracking stations around the world, and creating and managing scientific field research projects.
Citron also participated in a number of other United Nations programs involved with global environmental monitoring and assessing the human effect on planet Earth (1972–1975).
Adventure Travel magazine eventually reached a national circulation of over 100,000 and was distributed on half a dozen major international airlines.
Today, Earthwatch recruits close to 4,000 volunteers every year to collect field data in the areas of rainforest ecology, wildlife conservation, marine science, archaeology, and more.
Currently raising approximately $15 million a year from the generosity of institutions, individuals, governments, and corporations, Earthwatch has a global reach.
Earthwatch is currently supported by more than 150 staff, located in our headquarters in Maynard, Massachusetts, USA as well as in offices in Oxford, England; Melbourne, Australia; and Tokyo, Japan.
The foundation awarded the annual Kistler Prize, provided grants, and arranged events to discuss the long-term future of humanity.
[citation needed] According to the Southern Poverty Law Center (SPLC) in 2008, "the foundation's main undertaking is holding several seminars a year on such things as climate change, energy security, and other important matters.
These films included Zululand to Zambia, Ten Thousand Mile Safari, Europe North, Africa South, An American Boy in Russia, and others.
Recently Citron created a 15-minute film entitled Cosmic Origins: From the Big Bang to Humanity as a showcase for the work of the Foundation For the Future.
He also supervises the production of a series of short films for the Foundation, including Where Does Humanity Go from Here?, Visions of the Future, and The Young Scholars Inquiry Program.
He has participated in eight total solar eclipse expeditions in the Philippines, Mexico, Canada, Turkey, Mauritania, Ethiopia, India, and the Libyan Sahara between 1956 and 2006.
While working for the Smithsonian, Citron also organized and managed and was the principal cinematographer on 18 volcanic eruption expeditions in Africa, the South Pacific, North and Central America, Hawaii, the Philippines, and New Guinea (1968–1974).
Citron has published over 200 articles and has written, and/or edited dozens of books and reports dealing with short-lived phenomena, adventure travel, space exploration, meteorite distribution, global environmental monitoring, and the future of humanity.