GEO-1
GEO-1 may refer to:
- the first in a series of Global Environment Outlook reports issued in 1997 by the United Nations Environmental Program
- Geosynchronous satellite USA-230, also known as SBIRS High GEO 1, the first in a series of space surveillance satellites launched in 2011 as part of the United States Air Force's Space-Based Infrared System
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