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06 Feb 17. USAF tests massive B-2 sensor upgrade. The US Air Force is now testing new, high-tech sensors, software, electronics and other enemy radar-evading upgrades for its B-2 stealth bombers that are designed to preserve its stealth advantages and allow the aircraft to operate more effectively against increasingly capable modern air defenses.
The massive upgrade, designed to improve what’s called the bomber’s Defensive Management System, is described by Air Force developers as “the most extensive modification effort that the B-2 has attempted.”
The Defensive Management System is a technology designed to help the B-2 recognize and elude enemy air defenses, by using various antennas, receivers and display processors to detect signals or “signatures” emitting from ground-based anti-aircraft weapons, Air Force Spokesman Capt. Michael Hertzog said in a written statement.
The modernized system, called a B-2 DMS-M unit, consists of a replacement of legacy DMS subsystems so that the aircraft can be effective against the newest and most lethal enemy air defenses.
“This system picks up where mission planning ends by integrating a suite of antennas, receivers, and displays that provide real-time situational awareness to the aircrew. The DMS-Modernization program addresses shortcomings within the current DMS system,” Hertzog added.
Upgrades consist of improved antennas with advanced digital electronic support measures, or ESMs along with software components designed to integrate new technologies with existing B-2 avionics, according to an Operational Test & Evaluation report from the Office of the Secretary of Defense. The upgrade informs B-2 crews about the location of enemy air defenses so that they can avoid or maneuver around high-risk areas where the aircraft is more likely to be detected or targeted.
Air Force officials explained that while many of the details of the upgraded DMS-M unit are not available for security reasons, the improved system does allow the stealthy B-2 to operate more successfully in more high-threat, high-tech environments – referred to by Air Force strategists as highly “contested environments.”
Many experts have explained that 1980s stealth technology is known to be less effective against the best-made current and emerging air defenses – newer, more integrated systems use faster processors, digital networking and a wider-range of detection frequencies.
Upon its inception, the B-2 was engineered to go against and defeat Soviet air-defenses during the Cold War; the idea was to operate above enemy airspace, conduct attack missions and then return without the adversary even knowing the aircraft was there. This mission, designed to destroy enemy air defenses, was designed to open up a safety zone or air corridor for other, less stealthy aircraft to conduct attacks.
In order to accomplish this, B-2 stealth technology was designed to elude lower-frequency surveillance radar – which can detect the presence of an aircraft – as well as higher-frequency engagement radar, which is precise enough to allow air defenses to track, target and destroy attacking aircraft, developers explained.
It is widely believed that modern air defenses, such as these, are now able to detect many stealth aircraft, therefore complicating the operational equation for bombers such as the B-2, senior Air Force officials have acknowledged.
These newer air defense technologies are exhibited in some of the most advanced Russian-built systems such as the S-300 and S-400. In fact, according to numerous news reports and claims in the Russian media, the Russians are now engineering a new, more effective S-500 system able to hit targets out to 125 miles.
For this reason, many senior Air Force developers have explained that in the future, stealth technology is merely one arrow in a metaphori