The National Geospatial-Intelligence Agency has produced a revised edition of its “basic doctrine” which generally “explains what geospatial intelligence–or GEOINT–is, how it has evolved and how it contributes to our nation’s security.” See “Geospatial Intelligence (GEOINT) Basic Doctrine,” Publication 1-0, September 2006 (6.2 MB PDF).
The U.S. Air Force watches the skies by means of the Ground-Based Electro-Optical Deep Space Surveillance (GEODSS) system. An introduction to GEODSS, its structure, history and contributions, was prepared by Allen Thomson in A GEODSS Sourcebook (4.2 MB PDF).
This week the People’s Republic of China successfully launched two satellites into orbit. Earlier this month, China issued a white paper on “China’s Space Activities in 2006” (pdf).