Does IRST on fighter jets have any purpose other than to serve as a limited form of detection against stealth aircraft?
>>30097001
>other than to serve as a limited form of detection against stealth aircraft?
it's used for a detection of incoming missiles you fucking retard.
>>30097001
> as a limited form of detection against stealth aircraft
Someone's been drinking the koolaid. It's for missile detection. Field of view issues and water vapor horizon issues make it not-very-useful for detecting stealth - that's tacked on marketing BS, not the primary role.
>>30097001
How fucking stupid are you?
>>30097015
>>30097206
https://en.wikipedia.org/wiki/Infra-red_search_and_track
How about you people actually shut up if you don't know what you're talking about.
To answer your question OP, it can be used to passively give a firing solution at enemy aircraft, especially if used in combination with AWACS.
>>30097001
Depending on the FOV of the IRST, it can also serve as part of the high-offbore cueing system.
That's what the bulge is for on the Mig-29 and Su-27.
Missile warning with IRST is limited to the front. The F-35's DAS and J-20's ChinkDAS can do 360 missile warning.
>Cloudy day
>IRST instantly nullified
Well that was easy
>>30100482
>clouds
>interfering with IR
>>30098339
Su-27 derivatives also use ultraviolet sensors for MAWS that give nearly 360 degree coverage. It's not the same thing as the EODAS, but it's far better than relying on an IRST for missile warning.
>>30100616
Are you confusing IR and radar?
>>30100637
nope, are you confusing optical electromagnetic waves with the infrared spectrum?
>>30100642
>IR
>Cloud
>Water vapor absorbs infrared
You're not very good at this are you?
![visible_ir_annotate[1].jpg](https://i.imgur.com/Zczc6gj.jpg "visible_ir_annotate[1].jpg")
>>30100642
Have you ever given a thought as to why it gets cooler when clouds are overhead vs direct sunlight?
Or how the greenhouse effect works?
Pic attached is IR and visual satellite images of Earth
>>30100616
It significantly reduces the effective range of the IRST system.
>>30097015
>>30098339
IRST and MAWS (i.e. DAS) are completely different sensors. IRST is a telescopic sensor for looking at targets and narrow-FOV regions of interest at high resolution. Basically FLIR, but with air-to-air applications. MAWS, on the other hand, is a wide-angle sensor designed to detect intense contacts (namely, missile launches) at low resolution.
>>30100657
>>30100652
>>30100651
then why the fuck do reapers see people inside their homes?
>>30100670
They don't (have you ever seen a drone strike video?), IR can't even see through glass. If they could, there'd be a hell of a lot less collateral damage.
>>30097001
IRST was invented decades before stealth.
it's useful because just like radar it can detect targets and guide missiles to them, but unlike radar it does not give off your position to the enemy.
>>30100664
IRST can also do missile warning. even though it's narrow angle, it can scan the whole front hemisphere bit by bit and look for bogeys. S in IRST stands for Search.
IRST can scan faster than radar is also provides a higher detection rate against stealth targets than for fighter sized radars.
Bonus points for completly passiv.
There is a reason why the system is standard in all modern fighters.
>>30101350
...except F-22. what the fuck were they thinking?
>>30101376
About stealth. This thing increases RCS.
>>30101517
still beats having a radar turned on
>>30101324
A radar can also do missile warning; doesn't mean it's a primary use of the system.
>>30101350
>IRST can scan faster than radar
Depends on the IRST and radar. An AESA or PESA can scan a sector faster than an old-style microbolometer / non-imaging IRST for example.
>>30101533
Not if you're stealthy and have an LPI radar (and are targeting a non-stealthy enemy).
>>30101569
AN/APG-77 is 80's tech. i would think that RWRs have caught up with LPI by now.
>>30101587
LPI evolves as well; also the APG-77 / Raptor has received avionics upgrades in recent years.
>>30101594
there was only one update, APG-77v1, and that was mostly based around ground attack modes.
>>30101376
Quit talking anon that shit is secret.
>>30100652
>Or how the greenhouse effect works?
like this mostly
>>30101587
You would be suprised. Russian and chinese RWRs are suprisingly crude.
Nothing publicly matches whats in the F-35 or F-22. Eurocanard comes close but does not have the antenna count for geolocation.
>>30101634
>Moron detected
https://www.youtube.com/watch?v=KHJbSvidohg
>>30101634
Oh look a retard.
>>30101634
Took me a while to realize the kool aid was a jonestown referrence and not a "lol he's black" thing.
Political cartoons are still shit.
>>30097001
IRST was pretty damn useful. the F-14 had it, as did earlier century series aircraft. It is often found on foreign export aircraft as well, and of course, Russian jets.
What it does? Radar makes you expose yourself, IRST does not. IRST does not have the range of radar, but you are passive.
IRST has improved considerably over the years, and while it will never have over the horizon capability like a radar will, just due to the nature of light, its still pretty fucking great to have, considering how much a modern unit weighs.
http://www.lockheedmartin.com/us/products/InfraredSearchTrack.html
you can stick it on a fuel tank, on the front of a jet, fuck, put a bunch of sensors all over the jet and create a stripped down approximation of the F-35s EODAS system.
>>30101978
Generally speaking, you shouldn't compare radar to IRST. Their uses are just too different.
PIRATE, which isn't old by any means, is meant to be able to detect 4th gens at 50km. Thats not useful for anything but keeping track of targets in a furball, or larger aircraft without having to radiate.
Even then, its not a reliable system or one that factors into BVR much at all past solidifying a potential radar track.
>>30101978
>never have over the horizon capability like a radar
Pretty sure radars are limited by the horizon as well, unless you want to bounce things of the stratosphere
>>30101634
If a political cartoon has to label half of the important points in the image you know it's pretty fucking awful
>>30101634
Are you going to back peddle and claim that you were only pretending to be retarded?
>>30101978
Is there any documentation as to why the F-22 doesn't have it? Was it not known how to make it stealthy and the tradeoff was considered not worth it at the time of the program?
>>30104221
>Is there any documentation as to why the F-22 doesn't have it? Was it not known how to make it stealthy and the tradeoff was considered not worth it at the time of the program?
Probably. The F-22's already a massive dominator in any A2A matchup, so they didn't really see it as useful based on the available IRST tech in '91. With the F-35 they're using significantly smaller, much higher resolution Electro-optical modules than the IRST telescope systems in eurocanards, Flankers, Bloick 60 Vipers, and Block III Super Bugs.
>>30104221
>>30104311
To an extent, it's because of 2 reasons:
1. LPI mode worked well, making the passive detection capability of IRSTs less important.
2. While the US knew about new Chinese and Russian fighters in development, nobody expected them to be released quite so quickly. The idea was fund the radar, etc now, get IRSTs a decade or so later.
But because Gates scrapped the program, the plan for an IRST was also scrapped.
>>30098267
https://en.wikipedia.org/wiki/Infra-red_search_and_track#Performance
It looks like the anon did know what he was talking about.
>>30104221
the F-22 in its current iteration is a hollow jet. It was made to be expanded upon massively. Gates killed it because he was a fucking fool, and now we see that we need a new strike fighter, and the F22 even as an ATA jet was able to do it in syria.
>>30102917
There are ground units that feed data to the aircraft and do just that. However the individual aircraft do not. I cant speak for AWACS or larger systems.
https://en.wikipedia.org/wiki/Jindalee_Operational_Radar_Network #hichina
>>30102833
never really was extolling one over the other, just listing the general concept about them.
>>30106810
>Someone's been drinking the koolaid. It's for missile detection.
>An infra-red search and track (IRST) system (sometimes known as infra-red sighting and tracking) is a method for detecting and tracking objects which give off infrared radiation (see Infrared signature) such as jet aircraft and helicopters.[1]
Literally the first line of the article
https://www.youtube.com/watch?v=x-uCi56dyF4
>>30108562
the f-35 is better than the F-22 anyways
