Home » Air » Army Readies JLENS Surveillance Aerostat

Army Readies JLENS Surveillance Aerostat

by Kris Osborn on June 23, 2014

JLENS2The Army is developing  80-yard long surveillance balloons that can pinpoint targets from  beyond-the-horizon by floating up to 10,000-feet in the sky and using radar technology to locate potential targets — such as approaching enemy missiles, aircraft or unmanned systems.

So far, the Army has acquired two systems of the Joint Land Attack Cruise Missile Defense Elevated Netted Sensor System, or JLENS. JLENS completed Early User Testing in the third quarter of 2013, and concluded system design and development in the fourth quarter of 2013, Raytheon officials said.

The JLENS system completed developmental testing in December of last year; one of the two systems will participate in an operational evaluation at Aberdeen Proving Grounds, Md., and the other is being placed in strategic reserve by the Army in case it is needed for deployments.

A single JLENS orbit, which can help defend population centers, ground troops or other assets consists of two helium-filled aerostats tethered to ground stations with a cable, Raytheon officials said.

One of the two aerostats is engineered with VHF radar technology that can scan the surrounding areas out to distances of 500 kilometers, said Douglass Burgess, JLENS director, Raytheon. The VHF radar scans 360-degrees and is designed to identify targets or areas of interest for the second aerostat which uses a more precise X-band radar, he added.

The X-band radar, while higher resolution, does not scan a 360-degree area but is instead segmented into specific areas or vectors, Burgess explained.

“The two radars work as a pair. They exchange data back and forth so you have a complete picture of what is around you,” he said. “The surveillance radar gives you large volume with a lot of objects. It provides pretty good quality data on where threats are and where they are going. The X-band radar only sees a sectored wedge at a time and it moves mechanically in the direction the threat is coming.”

By placing the radars high up in the air, JLENS could help ground units see over mountains and identify approaching threats from much longer distances that might be possible on the ground.

“At 10,000-feet, we’re not limited by the horizon anymore,” Burgess said.

On three separate test occasions, JLENS has demonstrated its ability to integrate with defensive systems and help Patriot, Advanced Medium Range Air to Air Missile and Standard Missile 6 weapons intercept a cruise missile target, Raytheon officials said.

JLENS has also tracked threats such as swarming boats, unmanned aircraft, and detected tactical ballistic missiles in their earliest phase of flight, the boost-phase.

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{ 38 comments… read them below or add one }

Spruce Goose June 23, 2014 at 11:36 pm

Just what they need in Kiev. Barrage balloon revisited. Oops, it’s loose and floating over E.Kazahkstan! Putin has a $100,000 ruble reward offered. Grab that cable, Tovarich!

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SFC C+11 June 24, 2014 at 2:38 am

Spruce Goose – You sound like someone who had heard about the balloon that broke it's tether and floated out over the Atlantic (I heard 2 X F-14's were scrambled, fully loaded and came back empty and it was SLOWLY descending to the ocean). That was back in 1984(?).

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That guy June 30, 2014 at 1:44 pm

2010 They used these in Afgahanistan. I had seen them take many many small arms round on their accenion up, and they never came down till we towed them back down weeks if not months later. They are very very hardy pices of equipment

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hibeam June 24, 2014 at 12:09 am

These blimps just refuse to die. Put a fork in it already.

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Jay Gibbs June 24, 2014 at 3:46 am

Actually, blimps and airships are having a huge resurgence, due to their flexibility and integration with advanced technology. Like it or not, we're revisiting our past and there's no end in sight for lighter-than-air's future. Better get used to hearing more about aircraft like this.

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bohicaUSA June 28, 2014 at 1:03 pm

Yea, forget the Blimp, maybe it would be better to blow up Rosie O’Donald with helium, and let her float around 10,000 feet over Iraq until the ISIS or someone blows an AAM up her ass and she shoots off for the stratosphere…with flames coming out her ass and the Russians see her then complete the take-out…LOL .

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Big-Dean June 24, 2014 at 1:25 am

OMG, OMG, OMG, this thing has FIXED WINGS, why isn't the air farce having a hissy fit and crying to Congress? ;-P

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blight_ June 24, 2014 at 7:30 am

Soon the Army will have floating blimps with lasers and CIWS to shoot down missiles, and death rays for ground attack.

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Riceball June 24, 2014 at 11:44 am

Because it isn't armed, Key West specifically prohibits the Army from having/using ARMED fixed-wing aircraft. Still, I wonder if this might a loophole much like helos were; a blimp is a lighter than air craft so arming it might, technically, not violate the Key West Agreements. Bombs & missiles would be pointless but some long range guns might be useful for making a floating sniper platform of sorts for those times you want to take out a bad guy without wasting a missile and with a whole lot less collateral damage.

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blight_ June 30, 2014 at 6:44 pm

There's a lot more to Army/Air Force than Key West.

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henry blake June 30, 2014 at 5:25 pm

Probably because the Air Force has had aerostats (Goodrich Blimps) along the border for over 25 years.

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Cataldo June 24, 2014 at 9:29 am

This kind of systems will be more important year after year, is clear that satellites will be the first casualties in any kind of next symmetric confrontation.

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hibeam June 24, 2014 at 10:55 am

Dozens of Tiny drones with hi-res cameras zipping about hither and yon or a giant blimp floating on a tether. What to do what to do?

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chris June 28, 2014 at 10:50 am

AS for the giant blimp on a tether all I have to say is [ Pull ] !

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dban August 26, 2014 at 8:29 am

Yeah, you could get some really nice hi-res pictures of the cruise missile slamming into your ship.

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Bernard June 24, 2014 at 11:22 am

Air ships are cheap to operate, makes perfect sense. We need more economical solutions like this.

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Jay Gibbs June 24, 2014 at 2:11 pm

Meant to give you a thumbs up, not down. Agree 100%

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Tinto June 24, 2014 at 11:35 am

Looks as if it could be a good "Target", what can be seen over the horizon can, can also see it on or over the horizon?

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Dylan June 24, 2014 at 12:15 pm

Well that's why they're unmanned and made to be cheap and effective. They're pawns in a game of cruise missile chess.

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me39 June 27, 2014 at 10:02 pm

cheap, not at all. effective, yes.

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Jay Gibbs June 24, 2014 at 2:24 pm

They aren't so easy to shoot down, actually. It's fairly LO, because it doesn't have much of a RADAR cross-section, and doesn't present much of an IR target either. It won't just "pop" when when hit with even multiple bullets. And when combined with a modern air defense system like Patriot, and linked to other assets, it's a very dangerous target to attack. They can see you coming from much further away than your fighter's best AAM can hit, and when/if you can get close enough to attack it, you are already SAM and AAM fodder.

The only effective way of countering this, is developing a VERY long-rage AAM, or cruise missile, that can target with a video camera and/or home on RADAR emissions.

And just to reiterate, because it's important- we can afford this, in large numbers.

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blight_ June 26, 2014 at 12:10 pm

Or laser guidance. There's something very quaint about beam-riding missiles…

Which reminds me of the Starstreak.

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Stevan Fagan June 28, 2014 at 12:27 pm

also at just under 2 miles it would take the worlds best shot to hit with a sniper riffle,which don't shoot up as accurate as out. a bullet just wont climb that high.

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BohicaUSA June 28, 2014 at 12:44 pm

Some very good points you brought up…not like the guy "hibeam" who said, "stick a fork in them already". Funny how the social media has given bimbos and idiots a voice, when before we just ignored them.

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blight_ June 24, 2014 at 9:12 pm

Give it enough altitude.

It won't be long before the Navy gets /back/ into the blimp business. High altitude, put a radar in it, give it some missiles. A P-3 (and a P-8) has to go home, but the blimp will stay on station as long as it needs to.

And when they figure out how to put a CIWS or RAM on it, it'll probably have the gravity advantage when it comes to self-defense. And with high ground comes a free bonus in range for ground-attack weapons.

Parking one over Gulf of Aden would be nice too. Pick out the little boats, hover over the little boats, drop a Hellfire missile on them as needed.

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rtsy June 25, 2014 at 12:40 am

Would love to see these with Police departments and Homeland Defense

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Tad June 25, 2014 at 12:50 pm

Ouch!

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achfly June 27, 2014 at 6:32 pm

Boarder Patrol already has some. Not with RADAR obviously but various FLIR and long range optics packages. The tethered blimp has been used by the army for years with optics for base defense and area surveillance.

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mahatchma June 26, 2014 at 9:32 am

at 10,000 feet one would expect the radar horizon to be in the order of 130 miles, barring anomalous propogation.

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blight_ June 26, 2014 at 12:06 pm

I imagine with a GMTI they would detect seaskimmers as well.

Most of the anti-ship missiles the Navy fears so much have a range of at most 100 miles (and usually less). Detecting them at maximum range is as good as it gets. Unfortunately Brahmos has an upper bound of 300 mile range, thus maximizing standoff is critical to ship survival.

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SFC C+11 June 30, 2014 at 12:35 am

I worked with an aerostat mounted on a boat while stationed in Honduras back in 1985 & 1986. Ours had 2 x SEA MODES, 1 X was for calmer seas and the other was for a bit rougher seas (they were Sea mode 1 and Sea mode 2.
Sailing from Panama to Honduras we did not see much in the way of sea craft (actually I should say "I" not we there as I was the one who played with it more than the others. (The contractors trusted me working with it more too).

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blight_ June 30, 2014 at 9:15 am

Interesting. Either the seas were quiet or the radar couldn't pick out boats from clutter?

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bohicaUSA June 28, 2014 at 12:51 pm

For the 360o Blimp its 500 Kilometers = about 312 miles of radar sight…how good at the longer range is a question, I'll just take 200 miles like AWAX had in it's early development.

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Skip June 26, 2014 at 6:59 pm

Two things to consider:

1.) a helicopter pilot buzzing along suddenly gets snagged and tangled in a 10,000 foot cable he didn't see… there's always one poor, dumb son-of-a-bitch who just doesn't get the word.
2.) "OK, Jones, they shot the damn thing down… get out there and roll up that 10,000 feet of cable so we can reuse it."

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iRAID June 27, 2014 at 6:21 am

This article is 10 years late. This system has been in place since early 2005 in Iraq and there are bout 5 different versions of this system. And yes they are already being used in the U.S. along the border of Mexico. JLENS/ LEGACY/ 17M/ 22M/ REAP. And as far as being flown into by helicopters there is this nice little device attached to the cables called a IR strobe. The American public walks around with blinders on . . .Fking Shame!!!

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iRAID June 27, 2014 at 6:23 am
achfly June 27, 2014 at 6:35 pm

Yep and yep. We(helos) give them plenty of room.

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Stevan Fagan June 28, 2014 at 12:31 pm

the article is about an updated version

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