ESM systems have two factors which allow them to detect Rf MAWS emissions at much much greater ranges than the effective range of the MAWS.
First, the ESM operates with an R^2 relationship (one-way trip, emitter to ESM antenna) while the radar operates with and R^4 relationship (two-way trip, radar to and back to radar).
Second, modern ESM antenna have better Sn because they are physically and electrically isolated from airplane subsystem-generated noise sources.
In short, the Rf MAWS becomes a beacon to cue enemy ESM and SAM acquisition and tracking radar.
If it is hard for ESM to track modern LPI radar then it would even harder to detect modern radar MAWS.
Yes, it has some advantage, but it´s an active sensor and its a bigger dissadvantage, you will be a Xmast tree in the sky and you need to be emitting all time for to listen some, it is crazy decition. I read time ago they wanted change this system on future, they do not told why, but it is obvious of course.
Radar MAWS use antennas which aren’t powerful and have short range so detecting it by enemy fighter which isn’t close isn’t realistic. Reason why you want ot replace them with IR sensors is SA.
As I understand it have uv six uv fixed sensors and three ir rotating sensors each act as irst or ols. UV sensors as mostly for dircm because dircm would deal with close range missiles so engine burn would be easy to detect. IR sensors are for SA.
First Aesa radar was introduced on a F-15, after on a F-22.
F-22 was not the first stealth american aircraft. They had many experience before with the F-117. its weapons bay…we could see YF-22 firing from its internal bay, and on this current day we do not have any normal video with Su-57 on same way after many years…it seems need more time yet, or it is a problems with new missiles or i do not know, but all is very strange, and the first thing Su-57 need more time yet.
F-22 was a mature airplane from its birth, with its definitive engines. So when first F-22 joined US airforce it was widely superior to the F-15. IMo i can not tell same with Su-57 comparing with the Su-35. Not in this current stage.
WTF?!?
APG-63(v)2 is Raytheon product it doesn’t have nothing with APG-77 which is NG production! So you can’t use one radar as proof of maturity of another. BTW APG-63(v)2 was so “good” they only install it in dozen F-15 and I think they need to add ballast to compensate noticeable heavier weight or APG-63(v)2 compared to radar it replace.
YF-22 did fire ungided AIM-120 from weapon bay but that is same as what Russians doing with Su-47 weapon bay testbed. They use Su-47 for wepoan ejecting tests for quite awhile.
Su-57 did missile firing if you forgot:
https://cdn.almasdarnews.com/wp-cont…ed-file-23.jpg
Just because Russians don’t have need to show all missile tests doesn’t mean it can’t do it.
And F-22 wasn’t no where near mature plane when it enter service, you forgot losing GPS over Pacific when they were very lucky to seen tanker which they used so they follow it to base?
So stop with mature spin (neither F-22 nor F-35 were no where near mature planes when they became operational, F-35A still have problem with gun for example!).
You can argue is Su-57 agile as Su-35 with similar engines but saying they are similar in most characteristics is nonsense.
Su-57 without RAM is 10times smaller target then Su-35 with RAM.
Not only flight characteristics.
On this current stage Su-35 S is a mature platform, with mature technology, Su-57 is not yet enough mature. So is normal this situation.
That isn’t same as similar characteristics. F-15 was very mature when USA decide to make F-22. No one in USA said F-22 is little better then F-15 even though it wasn’t nowhere near mature fighter.
https://vz.ru/society/2018/7/6/931118.html
Here the article where i read time ago. And yes, you have reason was not Borisov who told it, it was said by others.
So I am not obtuse and i am not lying intentionally, in fact you can read the article where i read that, so if next time you do not show any respect do not wait i will not have any respect about you. Capicci?
It isn’t about stealth, sensors or even weapon systems it is about flight characteristics of Su-35 and Su-57. Of course they are similar because Su-35 is pinnacle of Flanker family it is very hard to beat it, so Su-57 need better engine to have noticeable difference especially in supersonic regime.
But if we look combat capablity they are different worlds. Fully armed Su-57 have at least one magnitude smaller RCS then non armed Su-35, if you read Chinese study its RCS is two or even three magnitude smaller. Sensors same story.
So if they really can get Su-57 for 2.2billion rubles that is steal even with 117 engine!
[USER=”71959″]Spud[/USER] I wasn’t writing about external but internal.
From some reason I can’t edit my post, interesting EOTS close up video: https://www.youtube.com/watch?v=rJDTdn-s4c4 Still naked metal but less, I wonder did they replace other metal parts with composite or just use some RAM coatings?
[USER=”40269″]FBW[/USER] To me this look like aluminium housing but maybe I am wrong: https://www.defencetalk.com/wp-content/uploads/2015/09/lockheed-martin-EOTS-F-35-targeting-system.jpg
[USER=”77048″]St. John[/USER]
What you posted is MiG-31 IRST. I posted MiG-25 IRST which is faceted, same or similar to MiG-23 IRST:
https://qph.fs.quoracdn.net/main-qimg-1b44593d8306b2c4fbcba8995496d312
[USER=”77826″]XB-70[/USER]
I wrote about OLS, and I did wrote RCS benefit of faceted glass exist but it is smallish, what is problem is optical mechanism so in discrete mode I would prefer not to have it exposed as Russians did with Su-57. Something like that would be lot harder to be done with faceted OLS.
@St. John
EOTS is lot bigger then OLS so spherical EOTS dome would lot bigger and it would create lot more drag then faceted dome. Faceted IRST isn’t something Russians don’t know:

But only benefit from faceted IRST is drag. RCS benefit is very low almost non existing because glass doesn’t reflect radar waves well, much bigger problem is IRST mechanism then dome shape, and Russians concluded IRST mechanism impact RCS a lot so when they want to be as stealthy as possible OLS will not be in used, its back side would be presented to enemy radars and that is composite RAM structure.
@mig-31bm
https://youtu.be/hvgyiFCoG0U?t=1063
Look what is on presentation slide, 20.00 they have targets on radar screen, then 20.30 they have four targets on screen. And if you check in newspaper article:
Komandir odeljenja OASt vodnik I klase Ljubenković izveštava da ponovo nema kvalitetne odraze na daljinama manjim od 60 do 70 km i traži dozvolu da bude van pripravnosti, radi dodatnog podešavanja. Ne dozvoljavam mu, smatrajući da nemamo dovoljno vremena za to. Oko 20.15 časova naređujem da se četiri rakete stave na pripremu 1. I dalje na pokazivaču nemam odraze nijednog aviona koji je bliži od 60 km. Ljubenković ponavlja zahtev da mu dozvolim da bude van pripravnosti kako bi izvršio podešavanje prijemnika. Odobravam mu ali samo 10 minuta. Oko 20.30 časova dobijam radarsku sliku na mom pokazivaču. Možda čak i koji minut ranije. Odrazi ciljeva su bili veliki, ali nisu bili uobičajenog intenziteta već bledunjavi – anemični. Pojavilo se četiri do pet odraza na daljinama oko 25 km.
In 20.00 they have targets but they are far away (60-70km) and siganture of targets isn’t good, then in 20.15 because all targets are more then 60km away they turn off radar, then around 20.30 they activate P-18 again and four or five targets with big but strange signature (anemic as Dani said) they are ~25km away.
@RALL
Conclusion of study have written error (they forgot -) check value in tables, it is -8.021 and -8.003 not 8.021 and 8.003.
@RALL
What you missed is mean value. Russians also use mean value.
And about -40dBsm they got:
On the one hand, the RCS value of the model in specific direction can be as low as −40 dBsm, which is a very low value shown in Fig. 3 and Tables 2–4; on the other hand, the relatively higher RCS value can be obtained in certain forward angle range of the model.The mean RCS value in a range of ± 30° of the forward direction is −5.625 dBsm when exposed to 10-GHz radar wave.
Lowest RCS of model is -40dBsm but because there are much higher RCS in frontal aspect they used mean value. What is interesting is this:
In general, it is the same or even exceeds the stealth level of modern fighters in the world.
BTW model does have radar blocker for engines, it doesn’t have RAM but skin is composite.
@RALL
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2175-91462016000100040
Su-57 model achieved -40dBsm (which is 0.0001m2 if I am correct):
On the one hand, the RCS value of the model in specific direction can be as low as −40 dBsm
So if Russians really want to make Su-57 as stealthy as F-22/35 they could, question is do they want it. Indians if want stealth level would need to pay for it, problem is India can’t afford all programs they started and they are quite sure Super 30 and Rafale AESA are more then enough to deal with J-20 and possible J-31.
@mig-31bm
I really don’t want to spam thread with F-117 but you probable don’t understand Serbian so you miss important things in presentation. For example in presentation you can see at 20.00 they have targets on radar which if you check newpaper article were 60-70km from P-18 and there were faint signatures (stealths).
Ancic WASN’T in trailer when they had four faint returens at 60-70km distance. He enter later, little before 23km detection. They turn on and off P-18 which is reason for gap between 60-70km and 23km and of course F-117 is stealth which makes things even worse.
SNR-125 range is 80km (instrumental) and that is probable for Tu-16 size target (because that is what Soviets use as measure standard back then) so that would be 80km for 20m2:
http://www.radartutorial.eu/19.kartei/11.ancient/karte032.en.html