Almaz-Antey S-400 Triumph / SA-21 Growler TABM/SAM

reddawn

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it is about the s-400 radar specifications, we know based on public information that the system is able to a 4 m2 target up to 250 kilometers, thus based on the radar equation it can detect f-35 stealth plane of 0.001 m2 at 31 kilometers?!

in contrast, an Irbis-E radar with a much smaller aperture compared to the s-400 92N6E Gravestone aperture can detect a 1 m2 target up to 283 kilometers, thus based on the radar equation it can detect the f-35 at 50 kilometers.

so how could an Irbis-E aircraft radar with a much smaller radar aperture and much smaller radar power to detect the aircraft much further than the s-400 which have a much bigger radar aperture and more radar power?
 

stealthflanker

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The easiest answer would be that the measurement is taken on different condition. Probably different threshold settings too.
 

reddawn

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but also even if the information is slightly wrong how could a small diameter radar aperture have more power and range detection in contrast to this huge 92n6e radar?!

and why the Russians can't put a 6 or 8 Irbis-E radar and integrate them together in one radar thus they get more powerful one?! is that possible!! solution and if no then why!?
 

stealthflanker

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In the usual place where losses go?

Yeah but not quite. The way to use the atmospheric loss factor is first you have to have calculate radar range in vacuum, then use the result to calculate the atmospheric loss factor, Then you use that resulted loss factor to calculate the final range estimate. The graphics alone wont be enough.

But anyway, i guess we can make simplification as one in other George M Siours's book "Radar Performance Modelling 2nd Edition"

Reference rangespractices.png

Since our interest is the loss factor and we have radar reference range of say 400 Km. The equation would look like this

R=Rref*(1/Llens*LWeather)

From the graph you provided the loss for 400 Km range and some 2 Degrees of Elevation is about :

LLens : 0.7 dB
LAtmos : 2.8 dB

So the range with those factors are

R=400*((1/(1.17*1.90))^(1/4))
R=400*0.82
R=327 Km.

So the range "loss" is about 18% for the elevation angle specified. One have to question however at what elevation angle the radar was tested.

OR maybe if Irbis were to put on the ground and use same parameters as above, considering the loss was only 18% in terms of range that still not really answer the question of near
50% differences in range. Or does the S-400 radar simply tested 0 degrees and "look ahead" to the Horizon which dont seems to be practical. But from the graphics does provide over 33% range loss. But then the range against 3 Sqm would be about 267 Km, not 232 Km calculated from the Export brochure.
 

reddawn

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i want to understand these schemes its about the s-300 radar 19Ж6 " СТ-68У " it was an early version of the system.
radaraaa.PNG


what does it mean the radar have 4 beams?!, does every beam work at the same time or one by one !?
radarbbb.PNG

radarcccc.PNG

why the beam have changing form and length and sometime detection range is lower when it comes to the higher angle beams?!
what affect the radar detection range, the atmospheric loss factor,and does the angle of the steered beam affect the detection range,because the higher angle the less detection range of the beam?!

radardddd.PNG

can someone explain these pictures , i want to figure out how these radars works?!!
 
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stealthflanker

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The main keyword to google here is "Diffraction" from which you can find "Pattern propagation factor". The "lobed" structure of the range-height coverage diagram is the result of that pattern propagation interaction where the radiowaves emitted from the radar interact with the ground and creates the null in coverage.

As for the stacked beam implementation of the ST-68. Well the radar may emit only one beam at a time but from different feeds where each feeds covers different elevation sector.
 

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totoro

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It'd be double standards though, if sanctions are waived for one country but not for another.
 

tequilashooter

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DUBAI, November 14. /TASS/. Russia plans to start the supply of the S-400 air defense systems to India before the end of the year, Director General of Russia's Rosoboronexport state arms seller Alexander Mikheyev told TASS on the sidelines of the Duban Airshow 2021.

"The plan is to begin deliveries before the end of 2021 in accordance with the time frame set in the contract," he pointed out.

Head of Russia’s Federal Service for Military and Technical Cooperation Dmitry Shugayev said earlier that work had already begun to arrange S-400 supplies to India.

India announced plans to purchase the S-400 systems in 2015. Moscow and New Delhi signed a $5.43 bln contract on the delivery of five regiment sets of the S-400 systems during Russian President Vladimir Putin’s visit to India in October 2018.
 

tequilashooter

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By seven partners do they mean seven countries?


DUBAI, November 14. /TASS/. Russia’s Rosoboronexport arms seller (incorporated into the Rostec state corporation) is in consultations with seven partners on possible supplies of S-400 Triumf missile systems, Rosoboronexport Director General Alexander Mikheyev told TASS on Sunday on the sidelines of the Dubai Airshow 2021.

"Rosoboronexport continues consultations with seven Russia’s strategic partners on supplies of high-technology and effective S-400 missile systems," he said, adding that customized approaches are used to each of the partners.

"During the talks, we discuss the scope of supply, equipment, offer additional means to boost the systems’ effectiveness and reliability," he noted.

Russia’s S-400 ‘Triumf’ (NATO reporting name: SA-21 Growler) is the latest long-and medium-range surface-to-air missile system that went into service in 2007. It is designed to destroy aircraft, cruise and ballistic missiles, and can also be used against ground installations. The S-400 can engage targets at a distance of up to 400 km and at an altitude of up to 30 km under intensive enemy fire and jamming.



The Dubai Airshow is one of the largest international aerospace shows held once every two years. Russia has been participating since 1993.
 

SOC

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I would assume they mean seven countries, yes. If I had to guess: Algeria, Belarus, India, Iran, Kazakhstan, Vietnam, Venezuela.
 

tequilashooter

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DUBAI, November 15. /TASS. Russia’s state arms exporter Rosoboronexport estimates its air defense weapon order book at $14 billion, Rosoboronexport CEO Alexander Mikheyev said at the Dubai Airshow 2021 on Monday.

"Rosoboronexport’s air defense weapon order book is estimated at almost $14 billion. It includes surface-to-air missile systems and complexes, radar stations and radar systems, automated control systems, electronic warfare and radio-technical reconnaissance stations and counter-drone systems," the chief executive said.

The air defense weapons that enjoy the greatest demand among foreign buyers at present include S-400 ‘Triumf,’ Antei-2500 and Favorit anti-aircraft missile systems, Buk-M2E, Tor-M2E and Tor-M2K surface-to-air missile launchers, Pantsyr-S1 anti-aircraft missile/gun systems, Sosna, Gibka-S and Pechora-2M surface-to-air missile systems and Igla-S and Verba man-portable air defense weapons, he said.
 

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