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Early History of the National Reconnaissance Office (5 of 5)

SIGINT Data Processing and Exploitation

Just as solid-state electronic technology changed the capabilities of SIGINT satellites dramatically, the computer revolution that began in the 1950s, and that is still underway, changed the capabilities of computer processing, almost day to day. The capability to process SIGINT information was especially powerful and quick to develop, because the SIGINT satellites collected electrical signals that, with proper coding, were in a form that computers could work on directly. From 1960 to 1975 the multiplying effect of improved satellite collectors and improved computer processors would provide a many-fold increase in operational capabilities. Developing the processing methodology was the key.

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26 June 2026 1

Congratulations to ENS Kevin H. Nguyen, Cryptologic Warfare Officer, Winner of U.S. Naval Academy Class of 2026 Capstone Essay Contest – Category: Information Warfare

The Navy’s center of gravity is evolving toward the information domain—not because it replaces ships or aircraft, but because it has become the decisive enabler of lethality, survivability, and decision advantage at sea.

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25 June 2026 0

Early History of the National Reconnaissance Office (4 of 5)

Imaging and Signals Intelligence Space Systems

The major effort within the US satellite reconnaissance program in the 1960s and 1970s featured overhead visual imaging systems, which produced information not obtainable any other way. (CORONA, GAMBIT, and HEXAGON, the early filmbased satellite systems, have already been well documented.) But there were important intelligence questions that could not be answered with pictures alone. The first question involved determining the location and characteristics of Soviet radars that could detect American strategic bombers. The second involved the performance capabilities of Soviet missiles—ICBMs and ABM systems. These two problems led the list of reasons favoring SIGINT satellites that could listen to and record the signals of Soviet radars, radio communications, and telemetry systems.

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25 June 2026 0

Early History of the National Reconnaissance Office (3 of 5)

Mission Requirements

Considering the prospect of a nuclear war with the Soviet Union, United States leaders in the 1950s had to know two things. First, what were the Soviets doing in their strategic missile programs? They had already demonstrated a nuclear capability with an atomic detonation in 1949 and a fusion-weapon test in 1953. Could they launch a nuclear weapon on a rocket over intercontinental distances? Second, how effective might Soviet defenses prove to be against US forces? Could the Soviets detect and shoot down US long-range bombers? And could the Soviets counter the developing US missile capability?

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24 June 2026 0

Honoring CTRC(SW/SS) Kirk R. Towner, USN (Ret)

Chief Towner entered the U.S. Navy Delayed Entry Program during his junior year of high school and subsequently enlisted on 18 June 1984 following graduation from Flagler Palm Coast High School in Palm Coast, Florida. Following recruit Training at RTC Orlando, Florida he reported to Naval Technical Training Center Corry Station Pensacola, Florida, for CTR/T A-school.

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24 June 2026 0

Early History of the National Reconnaissance Office (2 of 5)

Early History

During World War II, lookouts aboard surfaced German submarines used handheld crystal-video radar receivers called ATHOS to detect pulses emitted by search radars on Allied warships and aircraft This type of receiver consisted of a tuning coil and capacitor to select the approximate radio frequency to be received; a crystal diode, usually of silicon, that acted as a one-way gate, or rectifier, and produced an audible sound; and a simple amplifier that broadcast the “detected” sounds over a headset or loudspeaker. After the war, this same technology was adopted and applied in the direction-finding systems of American warships and airplanes because of its simplicity, small size, and “wideopen” frequency-detection characteristics.

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23 June 2026 0