Sensor-enhancing software helps detect diesel submarines.U.S. military planners have become concerned that rogue states or terrorist groups may acquire Russian Kilo-class, diesel-electric submarines and equip them with "air independent propulsion."
Diesel-electric submarines using air independent propulsion can remain submerged for extended periods of up to two or three weeks, and unlike nuclear submarines, diesel-electric submarines can "bottom out" or rest on the ocean floor.
Since shallow coastal regions are complex and noisy, the detection of such diesel-electric submarines is not possible using traditional acoustic methods.
With air-independent propulsion Air-Independent Propulsion (AIP), is a term that encompasses technologies which allow a submarine to operate without the need to surface or use a snorkel to access atmospheric oxygen. , the fuel source and reused exhaust gases are combined in a closed loop to generate a submarine's power. Current power plants include closed-cycle diesel engines and, more recently, fuel cells.
This form of propulsion, while not used by the United States United States, officially United States of America, republic (2005 est. pop. 295,734,000), 3,539,227 sq mi (9,166,598 sq km), North America. The United States is the world's third largest country in population and the fourth largest country in area. , Britain or Russia, is used by smaller navies. It is considered ideal for small vessels, is cheaper to operate and makes the submarine more difficult to detect.
Diesel-electric submarines can provide a formidable challenge to current surveillance systems. The high ambient noise levels from local shipping traffic and marine life make passive sonar detection almost impossible in littoral littoral /lit·to·ral/ (lit´ah-r'l) pertaining to the shore of a large body of water.
pertaining to the shore. waters.
The challenge of detecting diesel-electric submarines is best illustrated by an example from the Falklands War The Falklands War (Spanish: Guerra de las Malvinas/Guerra del Atlántico Sur), also called the Falklands Conflict/Crisis . During that conflict, the British Royal Navy could not defeat a single Argentinean diesel-electric submarine, although the British were highly experienced and released more than 150 weapons with no hits scored.
Low-frequency active sonar technology, such as the surveillance towed-array sensor system, may be an effective alternative to passive detection, but is politically disadvantaged because it has been reported to harm marine mammals marine mammals
mammals inhabiting the sea; generally taken to include the cetaceans (whales, porpoise, dolphin), the sirenians (sea-cows, including manatees and dugong) and the pinnipeds (the carnivores of the group, seals, sealions, walruses). .
Detecting submarines in littoral waters is comparable to locating landmines. It requires fusing data from a variety of sensors to pull the hidden signal out of the noise.
One of the technologies now being used by the German and Swedish navies to counter the threat of quiet submarines is a software architecture called the scalable generic signal processor, or scalable GSP GSP Good Scientific Practice
GSP Generalized System of Preferences
GSP Gross State Product
GSP German Shorthaired Pointer (dog breed)
GSP Geometer's Sketchpad (KTP Technologies geometry software)
GSP Georges St. .
The German Navy selected the scalable GSP technology for its new underwater acoustic analysis system, to be located at the Federal German Navy Hydroacoustic Analysis Centre.
The analysis system was designed to analyze the sonar records of the new U212A submarines, the U206A submarine, maritime patrol Maritime patrol is the task of monitoring areas of water. Generally conducted by military and law enforcement agencies, maritime patrol is usually aimed at identifying human activities. aircraft and fleet vessels.
The scalable GSP technology is built on an open-architecture cluster of parallel, off-the-shelf, general-purpose processors using Linux, an open-source operating system operating system (OS)
Software that controls the operation of a computer, directs the input and output of data, keeps track of files, and controls the processing of computer programs. . The term "scalable" describes the ability of the control software to recognize and utilize the available processors, whether one, 10 or hundreds.
The data-processing rate may be increased with the addition of processors, without a need to re-write or recompile To compile a program again. A program is recompiled after a change has been made to it in order to test and run the revised version. Programs are recompiled many times during the course of development and maintenance. See compile. the software. Conversely, single processor failures simply reduce processing speed. Users can add their own software modules to meet specific needs, such as the introduction of classified algorithms.
The scalable GSP employs a "Lego" style technique that allows users to graphically modify existing applications or to construct new applications with building blocks of processing functions.
The technology has been adopted internationally for sonar applications, and has been used in synthetic aperture radar Synthetic aperture radar (SAR)
Radar, airborne or satellite-borne, that uses special signal processing to produce high-resolution images of the surface of the Earth (or another object) while traversing a considerable flight path. processing.
Brian Markle is the chief technology officer of Array Systems Computing Inc., a supplier of scalable generic signal processor technology, based in Toronto, Canada.