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News

ECM Pioneer Honoured In US Naval Vessel Naming

Naval Research Laboratory (NRL) : 28 June, 2010  (Company News)
The name of Howard Lorenzen, a post-war pioneer in Electronic Counter Measures at the Naval Research Laboratory, has been given to a recently launched US Navy vessel
ECM Pioneer Honoured In US Naval Vessel Naming
Complete with the ceremonious champagne christening, the USNS Howard O Lorenzen (T-AGM 25) is the second ship in US Navy history to honour an NRL scientist for contributions made to Naval and civilian scientific research. Operated by the Military Sealift Command the missile range instrumentation ship, equipped with a new dual band phased array radar system and other advanced mission technology, will replace the USNS Observation Island launched in 1953.

In a career that spanned 33 years at the Washington based Naval Research Laboratory, Howard Otto Lorenzen developed the distinction as the “Father of Electronic Warfare” for his development of radio countermeasures that could exploit detected or interrupted electromagnetic transmissions for military purposes, intelligence gathering and electronic countermeasures — a pioneering concept that was the genesis of modern day electronic warfare.

“Lorenzen understood and the Navy realized the value and relevance of not only detecting enemy radio and electronic transmissions, but that recording, analyzing and deciphering these transmissions and developing intuitive countermeasures would prove to be an integral and vital function to the future of national security,” said Pete Wilhelm, Director, NRL Naval Centre for Space Technology.

Beginning his NRL career in 1940 as a radio engineer under the leadership of radar pioneer, Albert Hoyt Taylor, Lorenzen got his first taste of electronic countermeasures when he unintentionally jammed the signal of radar being tested at the lab’s Radar Division. As the US entered World War II with the attack on Pearl Harbor, Lorenzen’s research focused on developing electronic means to detect, locate, jam and otherwise deceive enemy radar and other electronic locating equipment, ushering in a new era of warfare to benefit US military countermeasures.

As the war progressed, Lorenzen, assigned to the lab’s Special Developments Section, continued to expand on the idea of electronic countermeasures, or ECMs, developing radio detection and recording devices to defeat guided German missiles by analyzing the control signals sent to Henschel 293 flying bombs and using the information to disrupt or distort radio command signals.

NRL’s experience during the war made it evident the importance of electronic countermeasures in Naval operations. After the war, Lorenzen continued to develop new, and tweak existing, ECM technologies organizing NRL’s Countermeasures Branch and toiling with recovered German and Japanese wartime electronic devices. Lorenzen developed the first US magnetic tape-recorder for intercept work and tunable microwave intercept receivers equipped in Navy ships, shore stations and aircraft.

During the 1950s and throughout the Korean and Vietnam military conflicts, ECM technology advanced by Lorenzen and his team of engineers provided new techniques and systems of electronic signal interception, signal source location including high-frequency direction finding, recording, analysis, jamming and deception. It was Lorenzen’s project engineer and prodigy, Jim Trexler, who first started calling Lorenzen “Father.” Trexler was the first to reveal that terrestrial radio signals reflected from the moon could be intercepted back on Earth using a giant parabolic antenna. An immediate outgrowth was the Navy's Communication Moon Relay (CMR) system, “moon bounce,” that provided our Navy with satellite communication a decade before artificial space satellites were operational.

In June 1960, after a US U-2 spy aircraft was shot down over the Soviet Union, Lorenzen’s most notable achievement became the Galactic Radiation and Background payload, GRAB, the earliest space-based reconnaissance satellite and the first US Navy electronic intelligence (ELINT) satellite used to obtain information on Soviet air defence radars that otherwise could not be observed from US military aircraft.

Situated 500 miles above the Earth, safe from surface-to-air missiles, the GRAB satellite's circular orbit passed it through energy beams from Soviet radar whose pulses travelled straight and far beyond the horizon into space. GRAB received each pulse of a radar signal in a certain bandwidth, as sensed by its tiny antennas, and transponded a corresponding signal to collection huts at ground sites within its field of view. Operators recorded transponded information on magnetic tape and couriered it to NRL for evaluation. NRL evaluated, duplicated, and forwarded the tapes to the National Security Agency at Fort Meade, Md., and the Strategic Air Command at Offut Air Force Base, Omaha for analysis and processing.

In the mid-1960s as Cold War tensions were ramping up, Lorenzen inspired his team to again think of new, innovative means to thwart enemy attacks on US military targets. In September 1966, his branch was upgraded to division status and Lorenzen was named superintendent of NRL’s new Electronic warfare Division with the chief role to develop advanced guided missile defences for Navy aircraft and state-of-the-art Electronic warfare (EW) components for the USS New Jersey.

In 1970, Deputy of Defence Secretary David Packard aligned space system acquisition responsibilities with those for weapon systems acquisitions and authorized the military departments to pursue departmental need for space systems. NRL turned to Lorenzen to repeat in space what he had accomplished in EW — design total systems for military operational support — and in 1971 named Lorenzen superintendent of NRL Space Systems. Lorenzen served as superintendent of NRL space systems until his retirement from NRL in June 1973.

Christened in formal ceremonies at VT Halter Marine, Pascagoula, Miss., the 12,575 ton, 534 foot ship will be home to a crew of 88 and will host embarked military and civilian technicians and mariners from other US government agencies. Missile range instrumentation ships provide a platform for monitoring missile launches and collecting data that can be used to improve missile efficiency and accuracy.

The USNS Hayes, named after NRL scientist Harvey Hayes, launched in 1970 and is the only other US navy ship commemorating an NRL scientist. Hayes, a distinguished scientist at the Naval Research Laboratory from 1923 until 1952, pioneered the world of ocean acoustics and is recognized as the first person to accumulate any substantial amount of data at sea and was later responsible for one of two operational sonar equipments used by the Navy at the outbreak of World War II.
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