Defense against Hypersonic Glide Vehicles

Cordy said:
Implies it will be a long range large and very powerful and very high Mach missile with the associated necessary big radar and a LEO satellite constellation system for continuous coverage.
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If you can catch them out of the atmosphere, it's better. They can't maneuver except via very easy to detect RCS thrusters, and maneuvering much out of atmosphere can either mess up their re-entry or make it very difficult to hit the target.



Cordy said:
Would that also imply for intercepting SRAM hypersonic cruise missiles that fly at lower altitude with in the earths atmosphere will require totally different missile system or perhaps rely on THAAD?
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Probably. Something like SM3 is exo-atmospheric only, it basically cannot maneuver inside the atmosphere. THAAD or Patriot PAC3MSE can maneuver inside the atmosphere, even if the missiles are actually capable of reaching over 100km up.
 
Cordy said:
Implies it will be a long range large and very powerful and very high Mach missile with the associated necessary big radar and a LEO satellite constellation system for continuous coverage. Would that also imply for intercepting SRAM hypersonic cruise missiles that fly at lower altitude with in the earths atmosphere will require totally different missile system or perhaps rely on THAAD?
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Wonder if it's the SM-6 IB now that it's been revealed that it also has a BMD function.

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Josh_TN said:
I suspect GPI will require a endo/exo atmospheric capability like THAAD.
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I wouldn't be at all surprised if SM-6 IB looked like the item second from right. If they're using the same variant for surface strike and I assume there's only one SM-6 IB, it's going to be real interesting watching adversary SAMs trying to intercept an air vehicle with DACT closing at Mach 5. :cool:

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Forest Green said:
I wouldn't be at all surprised if SM-6 IB looked like the item second from right. If they're using the same variant for surface strike and I assume there's only one SM-6 IB, it's going to be real interesting watching adversary SAMs trying to intercept an air vehicle with DACT closing at Mach 5. :cool:
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DACT and some drunk-walking algorithms, for roughly random maneuvering...

Gonna reveal some new profanity for sure! :D
 
www.defensenews.com

US and Japan sign agreement to co-develop hypersonic interceptor

The Japanese government has flagged hypersonic missile defense as an urgent capability, citing recent developments in the region.
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www.l3harris.com

Aerojet Rocketdyne and Kratos Successfully Hot-fire Zeus 2 Advanced Large Solid Rocket Motor for Hypersonic Test and Ballistic Missile Target Applications

Aerojet Rocketdyne and Kratos Successfully Hot-fire Zeus 2 Advanced Large Solid Rocket Motor for Hypersonic Test and Ballistic Missile Target Applications
www.l3harris.com www.l3harris.com

https://twitter.com/x/status/1790774385722192333
View: https://x.com/L3HarrisTech/status/1790774385722192333
 
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www.sankei.com

日米新型ミサイル共同開発が始動　極超音速を迎撃、日本側はモーターなど担当

日米両政府は１５日、北朝鮮や中国、ロシアが開発を進めている極超音速兵器を迎撃するための新型ミサイルの共同開発について、日米の役割分担などを定めた取り決め文書に…
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GPI
Japanese side will be responsible for the missile's rocket motor and the propulsion system for the warhead portion, known as the "kill vehicle,"
 
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6000/y ?! That´s roughly 20 per day on a 2000-acre ranch, hence one every shift day per 100 acre. I guess they are walking on powder residues... Not talking about air quality for their neighbors.

But why such a hassle?
 
TomcatViP said:
6000/y ?! That´s roughly 20 per day on a 2000-acre ranch, hence one every shift day per 100 acre. I guess they are walking on powder residues... Not talking about air quality for their neighbors.
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New Jersey. Pretty sure solid rocket exhaust is an improvement to general air quality around there...
 
It seems to me range is just a function of how large of a rocket booster you but behind it.
 
sferrin said:
Yeah, they have multiple types with boost gliders. Makes GBSD seem kinda pathetic.
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DF-17 is the only one known to be service. I believe an H-6 launched weapon and Type 55 weapon have been tested.
 
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bobbymike said:
Tangentially related
quantumzeitgeist.com

Quantum-Enhanced Radars Revolutionise Air And Space Warfare: Dr. Michal Krelina's Insights

Dr. Michal Krelina from the Czech Technical University in Prague explores the potential of quantum-enhanced radars and electronic warfare in a recent article. Quantum technology, which harnesses properties like superposition and entanglement at the fundamental level of individual quantum...
quantumzeitgeist.com quantumzeitgeist.com
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Wouldn't a quantum enhanced radar be so sensitive that it ends up detecting air molecules?
 
Lockheed Martin Space, Sunnyvale, California, has been awarded a $977,599,318 cost-plus-incentive-fee contract modification (P00127) to previously awarded contract FA8810-18-C-0005 for Phase 2.1B. The Phase 2.1B contract modification is for on-orbit developmental and operational testing, calibration, and tuning of the Overhead Persistent Infrared (OPIR) main mission payload, entrance into the interim operations period, and interim contractor support for the Next Generation OPIR Geosynchronous System for two space vehicles consistent with the space vehicle 3 descope. The locations of performance include Sunnyvale, California; Boulder, Colorado; and Aurora, Colorado. The work is expected to be completed July 31, 2029. Fiscal 2024 research, development, test and evaluation funds in the amount of $183,649,905 are being obligated at the time of award. Total cumulative face value of the contract is $8,193,503,619. Space Force, Space Systems Command, Space Sensing, Los Angeles Air Force Base, California, is the contracting activity.
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www.defensenews.com

Kratos’ Erinyes test vehicle logs hypersonic speeds on first flight

The company developed Erinyes in three years for under $15 million with a mix of internal investment and congressional funding.
www.defensenews.com www.defensenews.com

A hypersonic test bed built by Kratos took its first flight last month, launching experiments for the Missile Defense Agency and hitting speeds above Mach 5.

MDA announced the successful flight of its first Hypersonic Testbed, HTB-1, June 14, which took off from Wallops Island in Virginia. Not only did it provide a high-speed test platform for the agency, but it allowed its two missile tracking satellites — launched in February and designed to detect advanced threats — to catch their first tracks of a hypersonic vehicle.

While MDA did not provide details about which company built the system, Kratos confirmed last week that its Erinyes vehicle — named after the Greek goddess of vengeance — flew the mission.
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Had an interesting thought yesterday or the day before as we were talking about CCAs and how they'll end up reflecting the century series.

The first half of the Century Series was interceptors, mid and short ranged types.

Would something with roughly F104+ performance be somewhat viable for hypersonic defense? 250nmi range, but closer to mach 3 speeds.

I'm thinking that you have a couple of these UCAVs set up on ZLLs and on 30-second-scrambles from detection of the launch of a Hypersonic missile. 2 minutes or so time to climb to 12km from scramble call, then 3 minutes "cruise" at ~Mach 2.9(1km/s) to displace over the top of the target area to launch the interceptor missiles.

While some of this depends on just how fast the hypersonics are coming, it's looking like the incoming will be doing around 3km/s. As long as you have enough warning, this should allow for wider coverage of the defended areas versus small hypersonic attacks.

Although "enough warning" seems to be saying a hypersonic with 900-1000km range, ~3min at 1km/s is a circle 180km in radius. As opposed to ground launched missiles that appear to need to be within 10km of whatever the hypersonic is aimed at in order to be able to make the intercept at all.

Still means a screaming F414-powered UCAV taking off with rocket assist, but being 100km away from the target helps deal with the noise complaints from drills.
 
Scott Kenny said:
I'm thinking that you have a couple of these UCAVs set up on ZLLs and on 30-second-scrambles from detection of the launch of a Hypersonic missile. 2 minutes or so time to climb to 12km from scramble call, then 3 minutes "cruise" at ~Mach 2.9(1km/s) to displace over the top of the target area to launch the interceptor missiles.

While some of this depends on just how fast the hypersonics are coming, it's looking like the incoming will be doing around 3km/s. As long as you have enough warning, this should allow for wider coverage of the defended areas versus small hypersonic attacks.

Although "enough warning" seems to be saying a hypersonic with 900-1000km range, ~3min at 1km/s is a circle 180km in radius. As opposed to ground launched missiles that appear to need to be within 10km of whatever the hypersonic is aimed at in order to be able to make the intercept at all.
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The catch to this plan seems to be how quickly you can get whatever engine you're using started.

How long does it take to start an F414?

It might actually be worth an ejector ramjet instead of a big jet engine, use a booster big enough to get the ramjet started. Or a supercharged ejector ramjet, SERJ. Or maybe a precooled jet engine with a 90% peroxide booster into the afterburner, so you have 40% by weight of peroxide injected more oxygen in the mix to feed the afterburner. SERJ may require some spool-up time for the mini engine that powers the supercharger fan, and the precooled jet definitely needs spool-up time.
 

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