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The INTRUDER geosynchronous SIGINT spacecraft represents a consolidation of previously discrete COMINT and ELINT collection programs into a single collection platform under the Integrated Overhead SIGINT Architecture [IOSA]. When NRO presented its five-year program to Congress in the fall of 1995, the new satellites under development -- including the INTRUDER signals intelligence satellite -- was estimated to cost roughly a billion dollars apiece. IOSA will improve SIGINT performance and avoid costs by consolidating systems, utilizing medium lift launch vehicles wherever possible, and using new satellite and data processing technologies. At the urging of Congress, NRO initiated the study phase for the follow-on architecture, IOSA-2. These systems are intended to be increasingly responsive to operational needs and the military is an integral partner and participant in NRO space missions.

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Unconventional Threat podcast - Threats Foreign and Domestic: 'In Episode One of Unconventional Threat, we identify and examine a range of threats, both foreign and domestic, that are endangering the integrity of our democracy'

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