Radar

It’s the dead of night when the buzz of the engines of a series of Shahed-136 one-way attack drones breaks the silence. Carrying their lethal payloads the drones slip into the darkness with a distant supply base as their target. Tracking, identifying, and then destroying this swarm of drones is no easy task.

The unmanned aircraft system (UAS) threat environment is changing rapidly with an increasing variety of killer drones that demand differing methods of tracking and identification to engage and defeat them. Operational users are learning from rapidly-evolving- conflicts, and modern air defense methods increasingly rely on scalable, layered, and persistent sensing teams that can detect and track small, fast, low-altitude, and even swarming, aerial threats in all kinds of complex situations, on land or at sea.

Ray Bischoff served active-duty with the U.S. Army for nearly 25 years, and he’s now the senior director of business development at Leonardo DRS, specialising in evaluating tactical formations and defensive requirements at all operational levels throughout the Department of War and allied nations. He is particularly focused on emerging threats from drones..

Bischoff spoke at length with TWZ’s Jamie Hunter about the use of tactical radar systems as part of a layered counter-drone system that is sufficiently versatile to tackle the toughest drone problems now, and what may come in the near future.

JH: Can you set the scene with regards to how you see the counter-UAS mission right now from a sensing perspective.

RB: The counter-UAS environment is changing and advancing very quickly. At the top level, we need to employ a variety of sensor systems – in this particular case we’re talking about tactical radars – but there are many other types of sensors, and at the highest end of the threat level it’s about connecting these together into a networked architecture.

Layering different systems in depth is vital, both from a communications architecture perspective and physically layering them in different places to protect different routes or avenues of approach, or sensitive facilities.

Look at the Strait of Hormuz, for instance, which is a vast area, with a layered and networked system to maximize the depth of coverage. The primary reason for this is that the biggest enemy in many situations like these is time. That networked architecture and having sensors in depth really gains you time, which gives you opportunities to make a better decision, time to reposition, to better evaluate. You need time to evaluate what different things in space are doing, where they’re going or where they’re coming from.

JH: When you say layered, are you talking about different systems that can look in different ways over different distances and systems in different positions that help you with that time element? What does layered actually mean?

RB: You can layer different types of sensors. Think of baseball. If all your players are home-run hitters, you probably aren’t going to do very well. You need to have different skills across your team to succeed, and it’s the same thing here. Layering of radar sensing bands, different types of technology such as electro-optic and infra-red that “see” in long, short and midwave, acoustic sensors, electronic warfare sensors to look for signals and other types of energy. It’s also about physically layering them in space, or depth.

We often see large exquisite sensors that have a lot of range and cover a large area. But this makes them susceptible to being targeted and destroyed. Layering sensors gives you redundancy, retaining the ability to defend. So, this is layering both in physical location, and in different types of technology.

This way, if one of your sensors is taken down by any means – for example by electronic countermeasures – your other systems can theoretically continue to operate. Just think how you can see, smell, touch, taste – it’s the same concept with layering different types of technologies, which is exactly what we at Leonardo DRS do and we integrate them so we can interact and share information to maximize the benefits of this layered approach. A team ultimately makes the sensors more effective across networks and architectures.

JH: Presumably you get good indicators on developments from the current operations in Ukraine. You already mentioned the Strait of Hormuz as well. What are the big lessons that you’re getting here about different types and sizes of drones?

RB: Without going into the details of combat operations, the bottom line is you have to advance your technologies at the rate or as close to the rate of the advancement of the weapons systems that are being utilized. We’re seeing a mixture of things when it comes to the UASs; that’s larger craft that are getting faster and can carry heavier payloads, or smaller ones with longer ranges that can move through areas almost undetected. 

There’s been so much investment in UAS technology, and they are becoming cheaper and easier to manufacture. People can 3D-print these things in their houses now. So, looking at this from a sensing perspective, that layering is becoming increasingly important.

We are looking to do things to counter these developments, such as maybe elevate the sensors to “see” across the top of the trees or place a sensor down in a valley – so that adds layering in altitude or elevation to remove blind spots. Just like the military, if you’re setting-up a defensive position, you have to cover what we called “dead space” where you can’t see with eyes or sensors from ground level.

JH: Can we dig further into the role of tactical radars in counter-UAS, specifically Leonardo DRS’ 202 Expeditionary Skid, which I believe is based on your Extended Multi-Mission Hemispheric Radar [exMHR].

RB: Radars “see” things that are physically present in space and time, and that’s why they are such great tools in the counter-UAS kit bag of sensors. That said, some radars are affected by weather and other factors, some work better in particular environments.

The 202 Expeditionary Skid is a new system from Leonardo DRS that uses our long-range exMHR, which is a software-defined AESA [Active Electronically Scanned Array] pulse-Doppler radar. It operates in the S-Band and that’s a very reliable band for all weather conditions including strong performance in dust storms and rain. When you get into K, Ku, and X-bands, they typically have smaller beams and therefore greater accuracy, but they suffer in poor weather and can become extremely degraded. S-band radar suffers significantly less degradation in that environment.

The 202 Expeditionary Skid, also known as U-KIT-0091, has a single radar panel that has a search area of 90 degrees by 90 degrees, so we often mount them in groups of four to provide full 360-degree coverage. Each panel has a really fast scan rate, much faster than a traditional spinning radar set. Plus, having multiple radar faces to make up a complete system is much more survivable. They can also overlap their field of regard without impairing each other.

We have sought to provide a solution that marries an appropriate level of range, accuracy, capability, and performance, that can still be very flexible in its ability to relocate or change mission sets. This is designed to be extremely versatile, meaning that it operates in different environments quickly. U-KIT-0091 has been purposefully designed to be mobile in a compact system that can either be used by itself or networked and fused together with other systems. Back to the baseball analogy, this is the kind of guy you really want on your team because you can use them wherever you need them.

The radar or set of radars sit on a small skid system that can slide into the back of a pickup truck, into the back of a tactical vehicle, onto a trailer, you can set it just about anywhere and it occupies a four-by-four-feet position. It has its own power generation, its own positional information that works in denied environments, basically it’s capable of working by itself from the get-go. The best part is that it’s truly mobile – the operator doesn’t have to stop the vehicle to make it work. You can turn it on and set-off. It’s working. If you come to a stop, it’s still working. It can be mounted on a ship, it can be taken airborne by an aircraft, so it’s got land, sea, and air applications. We’ve installed these on all types of ground platforms, water-based platforms, on top of a building or some sort of structure and it’s already in service, but I can’t specify where. It tracks drones very well, but of course it can track just about anything that can exist in that space.

JH: So you could strategically locate several of your radars to look in different directions or be positioned to look in a certain direction if you knew the expected paths that the threats would use?

RB: The system is designed exactly for things like that. Instead of putting all of your eggs in one basket, you disperse your eggs, and focus on different avenues or approach angles so that you can then have sensors strategically located where they can pick up these things and then as long as they’re networked back into weapons systems that have the overlapping fields of fire or bubbles – coverage areas – then you can protect your area. 

Any time you can decouple a sensor from a weapon system or multiple types of sensors from each other, you stand a far greater chance of survivability and optimizing accuracy. If you put all your eggs in one basket, and if you lose that basket, you lose everything. In addition, if you separate sensors, you gain accuracy because you have different angles and you can leverage simple geometry.

JH: Could you depict what an end-to-end engagement might look like using your tactical radar.

RB: The radar sensors will typically be emitting energy as they search for objects in a particular space. If something is detected and determined to be a valid target then the data is sent from the radar to some type of a command and control system, which may well be receiving information from other complementary sensors too. It then fuses that data and passes it to an effector, whether that’s a non-kinetic or a kinetic system, for engagement.

Meanwhile, the radar continues to track and it can determine whether that object was removed or if its path changed, and so on and so forth. But you know, a lot of these radars operate in a way whereby they can be turned on or off by different sensors to avoid them having to constantly transmit energy, they’re very customizable to meet the requirements and the emissions that are needed, whether that’s air defense, counter-drone, etc.

They can operate independently too, maybe covering a small area that needs to be protected, and integrated with a localized weapon system, or, as I already explained, they can be networked into a much larger set-up, they are modular, open system architecture and easily incorporated.

Most customers tend to choose their own command and control systems, which is why the plug-and-play part of our system is so important. It really doesn’t matter what they want to partner it with, what we provide enables that very easily.

JH: To be clear, your tactical radars could be deployed to defend the entire eastern seaboard of the U.S., they could be positioned to defend an air base, or they could be used to defend a ship in the Strait of Hormuz.

RB: The architecture can scale geographically through a distributed, networked sensor approach. The specific coverage area depends on factors including sensor density, the threat environment, command-and-control integration, and the available effectors.

Customers can deploy multiple radars and feed them into a single command-and-control system, positioning sensors to optimize coverage for the operational need. For example, one radar set could cover a valley vulnerable to low-flying drone ingress, while another positioned on higher ground provides longer-range surveillance. The key is a modular capability that enables users to tailor coverage and layer sensors where they are most needed – without relying on one large radar system to see everything from a single location.

JH: I’m keen to know what you consider to be the most challenging drones to detect and track. Is the challenge the speed they’re traveling out at, maybe new low observable designs, or the fact they’re flying very low. What are the big issues you’re seeing?

RB: It’s really all of the above. The other really challenging problem is when something is flying very low to the ground. The lower they bring them in altitude, they are harder to track as an independent target.

The challenge with drone swarms isn’t detection – if you can see the drones, you can track them. The harder problem is managing those tracks, deciding which threats matter most, and assigning the right effector to each one.

If 100 drones are inbound, it’s not just about having 100 weapons available. It’s about coordinating a fast, cost-effective response across a large number of simultaneous threats.

Ultimately, pairing radars and electro-optical/infrared sensors together is the way to go, because each of those have their own strengths. One of those sensors is going to see the drone better than the other, plus you have the redundancy that at least a couple of them will “see” the threat and give you enough information in sufficient time to prosecute it. Fitting into that team, however it is constructed, is exactly how we position our 202 Expeditionary Skid U-KIT-0091 radar.

Contact the write: Jamie.Hunter@teamrecurrent.io

The series has been called an “understated masterpiece”, comparing it favourably to Yellowstone

For many people BBC iPlayer has become a great destination for drama, evolving far beyond its original role as a simple catch-up service for television. One of its biggest strengths is its extensive box-set offering, allowing viewers to binge entire series rather than waiting for new episodes to air weekly on the BBC.

The BBC has also continued to expand its selection of returning dramas, with previous seasons increasingly available to watch in full. Some of the most popular dramas listed on there include Happy Valley, Taboo, Wolf Hall and Normal People.

However, one drama series has caught the attention of viewers and it is essentially a revenge story, love story and Western epic rolled into one,

Set in 1890, the BBC series follows Lady Cornelia Locke (Emily Blunt), an Englishwoman who journeys to the American West in pursuit of the man she believes is responsible for her son’s death.

Her journey brings her into the path of Eli Whipp (Chaske Spencer), a former cavalry scout and member of the Pawnee Nation seeking to claim land promised to him for his military service. As their paths converge, the pair form an unlikely alliance while navigating the violence and lawlessness of the American frontier.

The English is created and directed by Hugo Blick’s which transports you to the dying days of the Old West for six hours, reports the Express.

Audiences have described the drama as an underappreciated gem alongside American Primeval and Yellowstone.

The English, aired on BBC Two and Amazon Prime in late 2022, and comprises of six episodes that have earned acclaim from traditional western devotees and those discovering the genre.

Westerns are enjoying a resurgence, fuelled by the popularity of shows such as Yellowstone, American Primeval, and 1923.

Despite its parallels to Yellowstone, devotees of The English have queried why it doesn’t attract the same recognition as other contemporary shows, despite being “Western in all the right ways”.

“Instantly, The English has made my top 10. I have seen a lot of movies and series over the many many years I’ve walked this earth. And seldom have I been struck so profoundly,” one IMDB reviewer described in a 10-star review.

“Every scene, every word, each gesture, to a person reaches out, aiming for the heart. Relentlessly uncovering a story that weaves beauty and horror in equal measure.”

“It never waits for you to catch up. But rather pulls you along as you follow- never really knowing what will happen and carefully doling out what has happened.”

“Fans of American Primeval should watch The English. Both are great Westerns featuring a strong female lead,” Emily Long writes for Screen Rant, adding “Though each of the shows have their own stories and unique characters, The English and American Primeval are surprisingly similar. Both shows centre on a woman trying to make her way across the American West with a travelling partner, encountering numerous challenges along the way.”

The show has also won over the hearts of Reddit’s 67,000-strong r/Western community, with one user, apswim22, remarking, “This was an amazing under-the-radar series. One of the better Western series in a while.”

Hundreds have applauded the series’ storyline, with BeautifulDebate7615 telling the Western subreddit, “We did not see the twist coming but kept wondering why things weren’t developing the way we expected. Then the twist perfectly explained things.”

Both Chaske Spencer and Emily Blunt earned nominations for Best Actor at the British Academy Television Awards and Outstanding Performance by a Female Actor in a Television Movie or Limited Series at the Screen Actors Guild Awards, respectively.

Stephen Rea earned an Irish Film and Television Award for his portrayal of Sheriff Robert Marshall.

Beyond the exceptional acting on display, Arnau Valls Colomer’s breathtaking cinematography is wonderfully complemented by Federico Jusid’s classical score, together creating an utterly compelling atmosphere.

Some critics have taken issue with the show’s tempo, with the opening episode labelled something of a slow burner, though such gripes quickly fade once the second episode hits its stride.

The English is available to stream on both BBC iPlayer and Amazon Prime.

The U.S. Missile Defense Agency (MDA) has plans for a new radar to succeed the AN/TPY-2. The AN/TPY-2 is most commonly associated with the Terminal High Altitude Area Defense (THAAD) ballistic missile defense system, but it can also be used as a stand-alone sensor in a larger integrated air defense network. MDA’s main desire now is to find a more mobile radar system to make them less susceptible to enemy missile and drone attacks. Iran’s successful targeting of largely static missile defense radars this year, including the reported destruction of at least one AN/TPY-2, has been a wake-up call to just how vulnerable these prized assets have become already. TWZ explored this reality and its implications in a detailed feature earlier this year.

MDA put out a call yesterday for “innovative prototype concepts” for what it is currently calling the Forward-Based Mode (FBM) Radar Next. This notably came just ahead of the annual Space & Missile Defense (SMD) Symposium in Huntsville, Alabama, that opened today and at which TWZ is in attendance.

The contracting notice stresses that the agency is currently in the pre-solication phase of this effort, but that it does have plans to eventually pursue these prototypes through an Other Transaction Authority (OTA) agreement. OTA is a mechanism typically used to support rapid prototyping and other research and development work outside of a typical and often drawn-out contracting process. In its budget request for the 2027 Fiscal Year, which was released earlier this year, MDA also explicitly asked for funding for a pair of “next generation radar prototypes to prove out and mature emerging technologies for the future FBM Radar fleet.”

For some additional context, MDA uses the term FBM here to refer to a radar used to detect threats, traditionally ballistic missiles, after launch. Deployable radars like the AN/TPY-2 employed in this role are typically emplaced at semi-permanent sites. The U.S. military also has higher-end static strategic radar sites around the globe, along with space-based assets, to help provide additional layers of early warning detection.

FBM is one of two typical modes of operation for the X-band AN/TPY-2. The other is a terminal mode where the radar is used to cue interceptors to incoming threats. As mentioned, AN/TPY-2 is most commonly used in the terminal mode as part of the THAAD system, but it also has a demonstrated ability to feed data to Patriot surface-to-air missile systems.

At the time of writing, the U.S. military is publicly known to have two AN/TPY-2s deployed in the FBM mode in Japan, as well as three more at sites in Israel, Qatar, and Turkey. Additional AN/TPY-2 are also currently forward-deployed elsewhere globally as a component of the THAAD system.

AN/TYP-2s, as well as the generators needed to power them, are trailer-mounted and technically road mobile. However, they are not designed to be very rapidly relocated from one site to another. This brings us back to the FBM Radar Next.

“As adversarial missile capabilities become increasingly sophisticated, the need for agile, survivable, and highly precise forward-based sensors has never been greater. Current static or semi-mobile radars are vulnerable to counterattacks and lack the rapid relocation capabilities necessary for modern distributed operations,” the pre-solication notice explains. “FBM Radar Next will close this gap by providing a system that can be quickly transported, set up, and operated in austere forward locations while maintaining interoperability with existing Command and Control, Battle Management, and Communications (C2BMC) networks.”

In terms of transportability and deployability requirements, “the system must be capable of rapid deployment and transport via C-17 military airlift and tactical ground vehicles,” the notice says. “The radar must demonstrate rapid setup and teardown times (e.g., operational within specified hours of arrival, and tear down within minutes to maximize survivability).”

The next-generation radar must also be capable of “high-sensitivity detection, persistent tracking, and precise discrimination of advanced threats in high-clutter and contested electromagnetic environments,” the notice continues. MDA also wants “engineered physical, thermal, and electromagnetic signatures to
ensure platform survivability in contested environments.”

Furthermore, “the design must support remote operations, command and control integration, and automated system health monitoring,” the notice adds. Minimizing the onsite operator footprint is critical to improving personnel safety and increasing overall tactical flexibility.”

MDA wants the FBM Radar Next to be able to slot into more “versatile deployment architectures, with the capability to operate either as a highly integrated single aperture or as multiple distributed arrays to optimize geographical coverage, sensitivity, survivability, or electronic protection.” In line with this demand, there are additional requirements for a modular design with open architecture systems, as well as seamless integration with the existing Command and Control, Battle Management, and Communications (C2BMC) architecture.

The MDA video below highlights the general capabilities of the C2BMC architecture in the context of a notional engagement of a hypersonic threat utilizing the still-in-development Glide Phase Interceptor (GPI).

GPI Scenario Animation

A highly networked and distributed concept of operations could open the door to more novel radar configurations, including ones involving larger groups of smaller types, to succeed the AN/TPY-2. Smaller individual radars could also have reduced signatures, be easier to conceal, and be more readily relocatable, all helping to reduce vulnerability. This could also make the entire system more resilient in the event that nodes are lost or otherwise rendered inoperable for any reason.

There could be benefits in terms of unit cost and scalability of production from such an approach, too. Prime contractor Raytheon is understood to have only produced 16 AN/TPY-2s to date, in total, for all customers, not just the U.S. military. The unit cost of a single one of those radars is generally pegged at around $250 to $300 million, and these are long-lead-time items that take years to deliver.

“The system design must prioritize manufacturing ease, design-for-manufacturing-and-assembly (DFMA) principles, and cost-efficiency. It is critical that the prototype demonstrates a viable pathway to rapid, high-volume production at an affordable unit cost,” MDA’s FBM Radar Next notice makes clear. “This ensures the capability to quickly scale production and cost-effectively replace radar units in highly active forward-deployed environments.”

Regardless of the approach MDA ultimately decides to pursue, the threat ecosystem that is driving the FBM Radar Next plans is real now, and is not just limited to enemy missile attacks. Weaponized drones, especially long-range one-way attack types, present real dangers to high-value targets. This fact had already been driven firmly into the public consciousness by the ongoing war in Ukraine. It has now been further demonstrated by Iran’s aforementioned targeting of prized air and missile defense radars around the Middle East during fighting earlier this year. The ramifications of all of this go well beyond these particular conflict zones, too.

As we wrote back in March after Iran’s very deliberate targeting of U.S. and allied radars became clear:

“Strategic air and missile architectures, in general, exist in a world now where the threats they face are not limited to very-long-range standoff capabilities possessed only by peer or near-peer adversaries.“

“It used to be, generally, that you had to fire a ballistic missile or high-end cruise missile in an attempt to strike one of these systems. Now, long-range one-way-attack drones, as well as increasingly capable cruise and ballistic missiles, continue to proliferate steadily, including to smaller nation-state armed forces and even non-state actors. An attack could even come from a small drone with a C4 charge launched from a fishing trawler 10 miles away from one of these critical radar installations. The threat of these kinds of near-field attacks has largely been overlooked for years, even as the low-end drone threat has exploded and ‘democratized’ precision-guided weaponry, as they did not fit the established aerial threat matrix and the countermeasures used to repel those threats.”

…

“The scale and scope of Iran’s retaliatory attacks so far, while clearly threatening, pale in comparison to what one would expect to see in a major high-end fight between the United States and China in the Pacific. The overall ramifications would also be more severe.“

“Beyond the more immediate impacts of losing this kind of strategic radar coverage, there are far larger implications. In some cases, these radars are designed to provide critical early warning and verification of incoming nuclear strikes, or other large-scale attacks by a major adversary, targeting a nation’s home soil. They are critical parts of the nuclear deterrent. As such, losing these sensors can have major downstream impacts on strategic decision-making cycles based on concerns about what suddenly is not being seen. Fewer radars also means fewer ways to double-check that a track is not a false positive in a scenario where the total available decision-making time could be seriously truncated, to begin with. These are concerns TWZ explicitly highlighted after Ukraine’s attack on the Armavir Radar Station in Russia in 2024.”

During a panel discussion at the SMD Symposium today, U.S. Army Lt. Gen. Richard Zellmann, Deputy Commander of U.S Space Command, further underscored the reality of the current threat ecosystem, including one-way attack drones layered in with traditional missile barrages. The general also highlighted the impact of more readily available space-enabled targeting and navigation capabilities.

“We see, I think, the low end on Epic Fury [the official nickname for U.S. operations against Iran earlier this year]. Sure, the missiles are more high-end, but we’ve seen our adversary employ a number of one-way attack systems that are coupled with these ballistic missile volleys,” Zellman explained. “We are really at this point in the history of warfare because of the democratization of space. Space isn’t a sanctuary. It’s no longer just the playground of nations with a lot of money.”

“The commercialization of space has created what many call essentially a transparent battlefield. And because I can see everything all the time with commercial ISR [intelligence, surveillance, and reconnaissance; in this case primarily satellite imagery], it’s given our adversaries capabilities that they haven’t had in the past,” he continued. “That ISR, if you couple it with a platform that has access to GPS or some other PNT [Position, Navigation, and Timing] system, and then you add in another layer of over-the-horizon comms, like say from an Iridium or a Starlink [satellite communications terminal], and you have a pretty lethal asymmetric weapon system that our adversaries can get a hold of.”

Munitions that use GPS, or a similar form of navigation, alone for guidance are only employable against static targets. This, in turn, only drives home even more the importance of the transportability and deployability requirements that are at the heart of the FBM Radar Next plan.

It’s also important to note that, like AN/TPY-2 now, FBM Radar Next will still be just one part of a larger air and missile defense architecture. In our analysis earlier this year, we noted that Iranian attacks on radars in the Middle East had reinforced arguments for new layered defenses to protect those and other prized assets and for migrating more early warning and missile tracking capabilities into space. There is still a question of how much of that functionality will be shared and eventually ported over into orbital sensing capabilities. As Lt. Gen. Zellmann pointed out today, threats to space-based capabilities continue to grow, and that domain can no longer be considered a sanctuary, either. Having a layered, redundant, and flexible mix of terrestrial and orbital sensing for ballistic missile tracking will remain highly important for the foreseeable future.

What exactly a successor to the AN/TPY-2 looks like in the end remains to be seen. What is clear now is that very real missile and drone threats have prompted a major rethinking on the part of MDA about how future missile defense radars will need to be employed to ensure they can survive going forward.

Contact the author: joe@twz.com