Jamming

The U.S. Air Force is continuing to expand on the capabilities of the Angry Kitten electronic warfare pod, which just recently made its combat debut on the F-16 fighter in the latest conflict with Iran.

New testing has focused on improving the ability of HC-130J Combat King II combat search and rescue aircraft carrying the pods to receive reprogramming updates in near-real-time via satellite. HC-130Js just recently flew extremely high-risk and high-profile sorties over Iran as part of the effort to rescue the crew of a downed F-15E Strike Eagle. Being able to rapidly refine and optimize Angry Kitten’s capabilities will help the system remain as effective as possible, even in a very quickly evolving threat environment, and could be a stepping stone to more advanced functionality.

The Air National Guard Air Force Reserve Command Test Center (AATC) recently shared details about new testing of Angry Kitten on the HC-130J during an iteration of the Bamboo Eagle exercise. Bamboo Eagle is a large-scale air combat exercise series focused on preparedness for a high-end fight in the Pacific. AATC has already been test flying Angry Kitten on the HC-130J for more than a year now.

The pods have also been test flown on Air Force A-10 Warthog ground attack jets and Navy F/A-18 Super Hornet fighters. As noted, it is now being employed operationally on Air Force F-16s, as well. Angry Kitten was originally developed to replicate hostile electronic warfare threats during testing and training, as part of a cooperative effort between the Air Force and the Navy, and worked so well that it was adapted to operational use. We will come back to this later on.

During Bamboo Eagle, “AATC’s primary evaluation centered on the Angry Kitten electronic warfare pod integrated aboard a HC-130J Combat King II. The force development evaluation built directly on an operational assessment completed the previous year, which found the system potentially effective and suitable on the platform,” according to a press release that the center put out last week. “Testers incorporated recommendations from that assessment while the 130th Rescue Squadron flew the pod against simulated ship-based and ground-based threats during exercise vulnerability periods, evaluating both survivability and the system’s broader electronic attack capability.”

The 130th Rescue Squadron is part of the California Air National Guard’s 129th Rescue Wing.

“Running alongside that effort, AATC continued maturing the Ka/Ku-band communications suite, which enables over-the-horizon communications and near-real-time electronic warfare reprogramming via satellite link,” the release adds. “The suite compresses what was previously a multi-day technique development and distribution process to near-real-time between sorties.”

AATC has previously disclosed that it has been working on this capability, which looks to be unique to the integration of Angry Kitten on the HC-130J, at least currently. The Combat King II has the benefit of a wide-band satellite communication system, which is also found on U.S. special operations C-130 variants and other aircraft. The HC-130J carries the pod using a Special Airborne Mission Installation and Response (SABIR) system installed in place of its left rear paratrooper door.

“The C-130 testing features innovative real-time updates to electronic warfare techniques,” AATC said in a previous press release in March 2025. “Unlike the F-16 tests, where pre-programmed mission data files were used, the C-130 testing includes development engineers aboard the aircraft who can modify jamming techniques mid-mission based on feedback from range control.”

As can be seen above, to date, AATC has largely framed the benefits of this reprogramming capability within the context of accelerating continuing test and evaluation of Angry Kitten. At that same time, this would also be extremely valuable in an operational context.

In general, electronic warfare systems use built-in threat libraries to accurately detect, categorize, and respond to waveforms. In turn, their effectiveness is inherently determined by the breadth of data in that library. Specialists, often working in purpose-built reprogramming laboratories far from the front lines, have to work tirelessly to keep these systems up to date. Historically, this has been a very lengthy process, and one that has increasingly had trouble keeping pace with the rate at which threats are evolving.

As noted, Angry Kitten was developed first as a training and testing tool. It is a direct outgrowth of the AN/ALQ-167 electronic warfare pod, variants of which have been used in those contexts for decades to mimic hostile electronic warfare threats. However, Angry Kitten was designed from the start to be more readily updatable and modifiable in order to make it easier to adapt it to new and evolving threats.

“At the core of that technology is Angry Kitten’s Technique Description Language architecture. Georgia Tech designed TDL as a hybrid that pairs dedicated hardware modules for speed and bandwidth with software for complex decision-making,” according to a press release Naval Air Systems Command (NAVAIR) put out last month. “The practical result: government programmers can reprogram the jammer to counter new threats without sending it back to the contractor for expensive, time-consuming code changes. When an adversary adapts its radar tactics, NAWCWD’s team can update the jammer’s response in days instead of waiting months for a contract modification.”

Angry Kitten is also known to make use of advanced Digital Radio Frequency Memory (DRFM) technology. Using DRFM, radio frequency (RF) signals can be detected and ‘captured.’ Those same signals can then be manipulated and retransmitted. As an example of what this means in practice, signals from enemy air defense radars or radar seekers on incoming missiles can be recorded and pumped back in a way that creates false or otherwise confusing tracks. That same data can also be used as part of the reprogramming process to improve the stability capabilities, as well as be further exploited for general intelligence-gathering purposes.

This all already contributed to the evolution of Angry Kitten into an operational system.

“We had a jammer called ‘Angry Kitten.’ It was built to be an adversary air jamming tool,” now-retired Air Force Gen. Mark Kelly, then commander of Air Combat Command (ACC), told TWZ and other outlets back in 2022. “And all of a sudden, the blue team said, ‘you know, hey, we kind of need that, can we have that for us?’ And so I see this iterating and testing our way into this.”

When it comes to near-real-time updates for Angry Kitten, even if the communications suite used on the HC-130J won’t fit on smaller tactical jets, it could potentially be ported over into a capability that is readily deployable to forward locations. Another possibility is that an aircraft with a wide-band satellite communications system could then pass updates for Angry Kitten to other aircraft within line of sight using other datalink capabilities.

The underlying developments have further implications when it comes to developing so-called cognitive electronic warfare capabilities. Cognitive electronic warfare is a broad area of development focused on new technologies to further automate or otherwise accelerate the reprogramming process. The absolute ‘holy grail’ of the overall concept is an electronic warfare system that can adapt autonomously in real time to new threat waveforms, or known ones being modulated in unexpected ways, even right in the middle of a mission. You can read more about all of this here.

Ongoing work to expand and improve Angry Kitten’s capabilities will also now benefit from lessons learned from the employment of the pods in combat sorties over and around Iran.

The multi-day effort to recover the crew of an F-15E Strike Eagle downed in that country earlier this month also highlighted the immense risks involved in combat search and rescue (CSAR) operations, and the importance of adding new self-protection capabilities to the HC-130J, specifically. Air Force Combat King IIs can expect to face far greater threats while conducting CSAR missions during a conflict with a near-peer adversary like China. This has prompted questions about the utility of HC-130Js and other traditional CSAR assets in the context of any future high-end fight.

In the meantime, Angry Kitten continues to evolve in significant ways, including its growing ability to receive key updated data remotely in near-real-time when paired with the HC-130J.

Contact the author: joe@twz.com

A picture of a U.S. Navy EA-18G Growler taking part in the current operations against Iran shows the plane carrying an interesting split load of two different electronic warfare pods. Typically, Growlers carry a pair of new AN/ALQ-249 Next Generation Jammer-Mid Band (NGJ-MB) pods or older AN/ALQ-99 pods under their wings, not one of each. The NGJ-MB pods offer a major leap in capability, but have continued to face reliability and other challenges. In general, the capabilities Growlers provide are essential to help support the launching of standoff strikes in the opening phases of a conflict, as well as missions penetrating deeper into defended areas as time goes on.

U.S. Central Command released the image of the EA-18G, seen at the top of this story, and taken as the aircraft was launching from the Nimitz class aircraft carrier USS Abraham Lincoln, last week. The Growler in question is assigned to the Electronic Attack Squadron 133 (VAQ-133). The Lincoln’s air wing, which has been very active in support of Operation Epic Fury since it began, also includes F/A-18E/F Super Hornet and F-35C fighters, E-2D Hawkeye airborne early warning and control planes, CMV-22B Osprey tilt-rotor carrier onboard delivery aircraft, and MH-60R/S Seahawk helicopters.

At first glance, the EA-18G picture is unremarkable, but a closer inspection shows the jet has one ALQ-99 Tactical Jamming System (TJS) pod and one AN/ALQ-249 Next Generation Jammer-Mid Band (NGJ-MB) pod under its left and right wings, respectively. The aircraft also has a drop tank under each wing, as well as what looks to be a third one on the centerline station under its fuselage. The Navy is in the process of replacing the ALQ-99s in part with the ALQ-249, something we will come back to later on.

The Navy is still in the process of transitioning away from the ALQ-99, and those pods remain in active service alongside ALQ-249s. However, TWZ was told in a past interview with two top officers involved in the NGJ-MB effort that the standard mixed loadout for jets carrying ALQ-249s is one of those pods under each wing, along with an ALQ-99 on the centerline. Growlers continue to fly operational missions carrying just ALQ-99s, as well.

Why the VAQ-133 Growler flew this particular sortie with this split loadout of one ALQ-249 and one ALQ-99 is unknown. It is possible that ALQ-99 was substituted for an ALQ-249 on that particular mission due to a lack of availability of the new pods due to maintenance or other factors.

The NGJ-MB pod has suffered from reliability and other technical issues in the past. At least as of the end of Fiscal Year 2025, the pods have continued to face challenges, according to a newly released report from the Pentagon’s Office of the Director of Test and Evaluation (DOT&E).

“The NGJ-MB with the OFP 5.3 software series is not currently suitable for supporting operational missions, due to additional progress required to improve reliability and availability,” the DOT&E report said. “The NGJ-MB system met its maintainability requirements, and
aircrew and maintainers found training to be adequate. Insufficient data are currently available to draw any significant conclusions
on pilot and maintainer workload and usability, given the sample size of the data.”

What steps the Navy may have taken to mitigate these issues since the end of the 2025 Fiscal Year is unknown. Whether this particular software configuration is found in deployed pods that are being used operationally is also not known.

“The Navy has deployed the NGJ-MB to five different Electronic Attack Squadrons,” the report also notes.

In a separate report released in 2020, the Government Accountability Office (GAO), a Congressional watchdog, highlighted negative impacts to EA-18G’s combat range when carrying an ALQ-249 under each wing and one ALQ-99 on the centerline. What the Navy may have done to address this since then is unknown.

A desire to ensure a certain mix of capabilities, together with a need for three drop tanks’ worth of additional fuel, may have also factored in the decision.

ALQ-249s do offer a major boost in capability, broadly speaking, compared to the older ALQ-99s. The NGJ-MB’s use of active electronically scanned array (AESA) antennas, which the AN/ALQ-99s do not have, as well as its modular open architecture design, also opens the door to more rapid integration of new and improved functionality down the line. This could include so-called next-generation cognitive electronic warfare capabilities, which you can learn more about here.

However, as its name makes clear, the ALQ-249 was originally designed primarily to provide mid-band coverage. ALQ-99s come in two separate versions, offering high and low-band coverage, respectively. Air defense radars and other targets for electronic warfare attacks do not all operate in the same frequency ranges, and some are capable of widely modulating their signal outputs specifically to help reduce vulnerability to jamming. Broader frequency ranges could also help when dealing with known threat systems that are being operated in unfamiliar ways.

“The NGJ-MB is assessed to be at least as operationally effective as the legacy AN/ALQ-99 system, against the threats tested on the open-air test ranges during IOT&E,” according to DOT&E’s report. However, the office’s “full assessment of operational effectiveness is provided in the classified IOT&E report published in July 2025.”

A separate Next Generation Jammer-Low Band (NGJ-LB) pod, now designated the AN/ALQ-266, is in development to complement as part of plans to completely replace the ALQ-99 family. However, as of 2024, the NGJ-LB pod was not expected to reach even an early operational capability until 2029. A years-long contract dispute contributed to the delays in work on this pod.

The Navy has also made a decision to expand the capabilities of the NGJ-MB pod to “extend the upper frequency coverage limit to counter modern and adaptive threats” and to “increase frequency range of the NGJ-MB system and enhance the survivability of the platform and protected entities against emerging threats,” according to official budget documents. When these improved NGJ-MB Extended (NGJ-MBX) pods are expected to enter operational service is unclear.

The Navy has also talked in the past about acquiring a dedicated NGJ-High Band (NGJ-HB) pod to address that end of the frequency spectrum, but the current status of that plan is not clear. “I’ll say high band is still on the to do list, but it’s prioritized appropriately, and we’ll get to it eventually,” Capt. David Rueter, then program manager for airborne electronic attack systems at Naval Air Systems Command (NAVAIR), told TWZ last year.

It’s also worth noting here that external pods are just one part of the complete electronic warfare suite on the EA-18G, which also includes elements integrated inside the fuselage and in fixed pods on the tips of the wings. Just last Friday, Prime contractor Boeing received a new modification to the existing contract, with a value not-to-exceed $489,306,966, for upgrades to Growler’s built-in electronic warfare capabilities with the integration of a new system called the AN/ALQ-264 Beowulf. This is part of a larger ongoing upgrade effort for the Navy’s EA-18G fleet.

All of this underscores the overall importance of the Navy’s EA-18Gs to U.S. joint operations, which has been on display as part of the current campaign against Iran. As TWZ has explored in detail, American and Israeli strikes have substantially degraded Iranian air defenses and other military capabilities, but this should not be confused with total air dominance, especially over the northeastern end of the country. When it comes to standoff strikes, the support Growlers provide can help ensure munitions get to their targets, as well as help reduce risks to launch platforms. More recently, there has been a notable shift to direct attacks across other parts of Iran, where air supremacy has largely been achieved. Still, electronic warfare support would help in those areas to mitigate any residual air defense risks.

Earlier in the year, TWZ had already highlighted the importance of EA-18Gs in the opening act of any major air campaign, as well as follow-on phases, in the lead-up to Operation Absolute Resolve. Growlers were a key component of that operation, which occurred in Venezuela in January, resulting in the capture of dictator Nicolas Maduro.

With the Operation Epic Fury air campaign still in full swing, Growler will continue to provide essential electronic warfare support, whatever mixture of pods they carry.

Contact the author: joe@twz.com