JDAM: A GPS-INS Add-on Adds Accuracy to Airstrikes

B-2 drops JDAM

Precision bombing has been a significant military goal since the invention of the Norden bomb sight in the 1920s, but its application remained elusive. Over 30 years later, in Vietnam, the destruction of a single target could require 300 bombs, which meant sending an appropriate number of fighters or bombers into harm’s way to deliver them. Even the 1991 Desert Storm war with Iraq featured unguided munitions for the most part. The USAF some laser and TV-guided weapons like Paveway bombs and Maverick missiles, but they were very expensive, and only effective in good weather. If precision bombing was finally to become a reality throughout the Air Force, a new approach would be needed. The Joint Direct Attack Munition (JDAM) became that alternative, an engine of military transformation that was also a model of procurement transformation.

DID’s FOCUS articles offer in-depth, updated looks at significant military programs of record. This DID FOCUS Article looks at the transformational history of the JDAM GPS-guided bomb program, the ongoing efforts to bring its capabilities up to and beyond the level of dual-mode guidance kits like Israel’s Spice and Raytheon’s Enhanced Paveway, and the contracts issued under the JDAM program since its inception.[updated]

Tomahawk’s Chops: xGM-109 Block IV Cruise Missiles

Block IV Cutaway

Block IV Tomahawk is the current generation of the Tomahawk family of cruise missiles. The BGM-109 Tomahawk family began life in the 1980s as sub-sonic, low-flying nuclear strike weapons, before being developed into long-range RGM/UGM-109 conventional attack missiles. They’re most frequently launched from submarines and surface ships, and have been the US Navy’s preferred option for initial air strikes in Iraq, Libya, et. al. Britain has also bought Tomahawk missiles, and launches them exclusively from submarines.

Block IV is the latest variant. It adds innovative technologies that improve combat flexibility, while dramatically reducing the costs to buy, operate, and support these missiles. That’s why the Block IV program, under US Navy PMA-280, has been one of the USA’s defense acquisition success stories over the last decade.

Switzerland Replacing Old F-5 Fighters with New Gripen

Swiss F-5Es

The F-5E/F Tiger II was a follow-on upgrade to the wildly successful F-5 Freedom Fighter, a low-budget aircraft designed to capture the lower tier of the non-Soviet global fighter market in the 1960s and 1970s. A number of countries still operate F-5s, but the airframes are very old. While F-5 owners like Brazil, Chile, Thailand, et. al. have opted for comprehensive refurbishment and upgrades, Switzerland is looking to replace 3 of its 5 Tiger II squadrons with new aircraft under its Tiger-Teilersatz TTE program. The new fighters will partner with the 3 squadrons of upgraded F/A-18C/D Hornets that make up the rest of its fighter fleet.

An initial evaluation RFP was issued to 4 contenders, but Boeing’s withdrawal narrowed the selection to Sweden’s Gripen, France’s Rafale, or EADS’ Eurofighter Typhoon. A 2010 suspension of the competition was followed by a measured revival, thanks to the latest budgets – and now, by a provisional winner. No matter who won, though, left-wing opponents of Switzerland’s military would be working hard to derail the purchase. It’s likely to face a national referendum, just like the 1993 F/A-18 Hornet sale. After the current controversy over fighter evaluations runs its course.

NH90: Europe’s Medium Helicopter Contender

NH90: TTH & NFH

The NH90 emerged from a requirement that created a NATO helicopter development and procurement agency in 1992 and, at almost the same time, established NHIndustries (62.5% EADS Eurocopter, 32.5% AgustaWestland, and 5% Stork Fokker) to build the hardware. The NATO Frigate Helicopter was originally developed to fit between light naval helicopters like AW’s Lynx or Eurocopter’s Panther, and medium-heavy naval helicopters like the European EH101. A quick look at the NFH design showed definite possibilities as a troop transport helicopter, however, and soon the NH90 project had branched into 2 versions, with more to follow.

The nearest equivalent would be Sikorsky’s popular H-60 Seahawk/ Black Hawk family, but the NH90 includes a set of innovative features that give it some distinguishing selling points. Its combination of corrosion-proofing, lower maintenance, greater troop or load capacity, and the flexibility offered by that rear ramp have made the NH90 a popular global competitor.

As many business people discover the hard way, however, success can be almost as dangerous as failure. NH Industries has had great difficulty ramping up production fast enough to meet promised deliveries, which has left several buyers upset. Certification and acceptance have also been slow, with very few NH90s in service over a decade after the first contracts were signed. Booked orders have actually been sliding backward over the last year, and currently stand at 474 machines, on behalf of 14 nations.

Korea’s T-50 Family Spreads Its Wings

T-50 Golden Eagle

South Korea’s T-50 Golden Eagle family offers the global marketplace a set of high-end supersonic trainer and lightweight fighter aircraft. They’re hitting the international market at a good time: just as many of the world’s jet training fleets are reaching ages of 30 years or more, and high-end fighters are pricing themselves out of reach for many countries.

The ROK’s defense industry is advancing on all fronts these days. Its shipbuilding industry, one of the world’s busiest, is beginning to turn out its own LHDs, and even high-end KDX-III AEGIS destroyers. On the armored vehicle front, Korea’s XK2 tank and K9/K10 self propelled howitzer are beginning to win export orders, and its XK-21/KNIFV amphibious infantry fighting vehicle may not be too far behind. All fill key market niches, promising performance at a comparatively inexpensive price. Now its aerospace industry is in flight abroad with the KT-1 turboprop basic trainer, complemented by the T-50 jet trainer, TA-50 LIFT advanced trainer & attack variant, and FA-50 lightweight fighter.

The TA-50 and FA-50 are especially attractive as lightweight export fighters, and the ROKAF’s own F-5E/F Tiger II and F-4 Phantom fighters are more than due for replacement. The key question for the platform is whether it can find corresponding export sales.

The Wonders of Link 16 For Less: MIDS-LVTs

Link 16 Display
(click to see situation)

Jam-resistant Link-16 radios automatically exchange battlefield information – particularly locations of friendly and enemy aircraft, ships and ground forces – among themselves in a long-range, line-of-sight network. For example, air surveillance tracking data from an Airborne Warning and Control System (AWACS) aircraft can be instantly shared with fighter aircraft and air defense units. More than a dozen countries have installed Link 16 terminals on over 19 different land, sea, and air platforms, making it an interoperability success story.

While recent advancements may make AESA radars the future transmitters of choice, Link 16 is the current standard. The Multifunctional Information Distribution System-Low Volume Terminals (MIDS LVTs) were developed by a multinational consortium to provide Link 16 capability at a lower weight, volume, and cost than the Joint Tactical Information Distribution System (JTIDS). This free-to-view DID Spotlight article throws a spotlight on the program, explaining Link 16, and covering associated contracts around the world.

USA Issues JSOW Block III Production Contracts

AGM-154C, impact

In March 2007, Raytheon received a contract to develop the AGM-154C-1 variant of the popular JSOW glide bomb family. This new version would add moving target capability via improved imaging infrared seekers, better seeker algorithms, and a 2-way Link-16 data link. That combination allows the missile to be used as a secondary weapon against enemy ships, with some capability against certain moving land targets. The 2-way link ensures that targeting commands can be received, and missile status and position transmitted back, right up to the moment of impact. Most of those options are currently found only at the high end of the cruise missile market, giving the AGM-154C-1 an interesting positioning as a cheaper short-range alternative.

That development effort was successful, and in late 2008, the US DoD gave the go-ahead for JSOW Block III, which will be integrated on US Navy F/A-18 E/F Super Hornets and on the F-35 Lightning II. Now, the JSOW Block III system is the default version under the US Navy’s full rate production contract.

The UK’s Watchkeeper ISTAR UAV

Watchkeeper 450

Britain has given the green light to the Watchkeeper Unmanned Aerial Vehicle Program. The initial August 2005 contract award to Thales UK’s joint venture was worth around GBP 700 million, and the program expected to create or sustain up to 2,100 high-quality manufacturing jobs in the UK. The Watchkeeper platform is based on Elbit Systems’ Hermes 450 UAV platform, which is serving as a contractor-operated interim solution on the front lines of battle.

Watchkeeper will be an important system, working as the likely medium-range mainstay within a complementary suite of manned (vid. ASTOR Sentinel R1) and unmanned (Buster, Desert Hawk, MQ-9 Reaper) aerial Intelligence Surveillance Target Acquisition Reconnaissance (ISTAR) systems. This will make it a core element of the UK Ministry of Defence’s Network-Enabled Capability strategy.

USA Upgrades Submarine Fleet Acoustics Under A-RCI Program

Acoustic Rapid Commercial-Off-The-Shelf Insertion (A-RCI) is a sonar system upgrade installed on the USA’s entire submarine fleet, including SSN-688 Los Angeles & SSN-688I Improved Los Angeles Class, SSN-21 Seawolf Class, SSN-744 Virginia Class, SSBN-726 Ohio Class nuclear missile boats, and the new SSGN Tactical Trident special ops and strike subs.

This DID Spotlight on ARCI adds a bit more explanation of exactly what the program entails and where its benefits were focused, as well as covers contracts placed under the A-RCI program from FY 2005 onward. The program’s concept is simple: you can upgrade the system without changing the sensors. By sharply upgrading ship sensor processing, it integrates and improves the boat’s towed array, hull array and sphere array sonars, running more advanced algorithms and providing a fuller “picture” of the surrounding environment. Sometimes, it really is all about what you can do with it. A-RCI’s open architecture concept also make it easier to integrate additional sensors, providing a dual-track improvement option for American submarines.

JPADS: Making Precision Air-Drops A Reality

Strong’s JPADS,
Afghanistan

The dilemma for airdropping supplies has always been a stark one. High-altitude airdrops often go badly astray and become useless or even counter-productive. Low-level paradrops face significant dangers from enemy fire, and reduce delivery range. Can this dilemma be broken?

The US military believed that modern technologies could allow them to break the dilemma. The idea? Use the same GPS-guidance that enables precision strikes from JDAM bombs, coupled with software that acts as a flight control system for parachutes. JPADS (the Joint Precision Air-Drop System) has been combat-tested successfully in Iraq and Afghanistan, after moving beyond the test stage in the USA… and elsewhere.