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Hi, what else is not modeled in the simulator? I find that manual is realy helpful, but still have a lot of questions... Here some..:

1. How T/TИ87В works? I mean how calculates deviation of impact point? By changing of power of jamming noise (approaching jammer - stronger signal)?
2. Why changing "Beams" changes sector of receiving of the signal, when tracking jamming targets? At least receiving antenas for "Wide" and "Pencil" beams are the same, so it should't "cut" my sector of receiving?
3. When I want to transmit fake launch signal, should I switch "Peredatchik" on, or when I switch THE SWITCH ( RPK) to "antena". it is transmited via P-16 antena?
4. What "Работа по АДА" means?

This is for now... Better find me a huge book for C-75, or I keep asking...

3. When I want to transmit fake launch signal, should I switch "Peredatchik" on, or when I switch THE SWITCH ( RPK) wink to "antena". it is transmited via P-16 antena?

PEREDATCHIK will show "SA2" on the RWR
RPK swithc to ANT will show "LAUNCH" on the RWR


Also with the Volhov, 75km mode plus BR (live fire) will cause the SNR to emit launch signals.

2. Why changing "Beams" changes sector of receiving of the signal, when tracking jamming targets? At least receiving antenas for "Wide" and "Pencil" beams are the same, so it should't "cut" my sector of receiving?

No, the pencil beam antennas are emitting, and receiving the target channel.
The wide beam antennas are receiving the missile channel only.

hmmm...


ps: forum does not support Cyrillic letters

Look, at the T/T method impact point has little importance. The missile attempts to fly on a straight line "connecting" radar to jamming target. The target MUST be somewhere along that line, and radio fuse will find out where You need to know target distance only roughly (e.g. from P-18) to determine if the target is in range.

If you mean I87V T/T, I guess that I87V uses some analogue calculator to determine distance using simple trigonometry (altitude / elevation).

By the way, Hpasp, why 'narow beam' and LORO are not available in H<5 mode? By deduction, narrow or pencil beams should be better suited for small altitudes, because this eliminates huge deal of ground clutter (that's the reason why SNR-125 stops scanning in elevation in MV mode - 1 deg. or less).
And, are there any arguments (I mean, arising out of radar specifications) against using e.g. LORO at small altitudes, except for the possibility that the radar jams when reaching 0 deg.?

By the way, Hpasp, why 'narow beam' and LORO are not available in H<5 mode? By deduction, narrow or pencil beams should be better suited for small altitudes, because this eliminates huge deal of ground clutter (that's the reason why SNR-125 stops scanning in elevation in MV mode - 1 deg. or less).

Hmmm...
... it would be much easier to explain it in real life, but I try.

During Wide Beam scanning, in the Beta screen (azimuth) you scan 20 degree in azimuth, and 7 degree in elevation.


By switching to the Narrow Beam antennas, you limit your coverage into 7,5 degree in azimuth, and 1,7 degree in elevation.




By switching H<5 mode, you move the elevation boresight down by 3 degrees.



In the Narrow Beam case, combined with H<5, you would simply move the boresight OUT OF THE COVERAGE OF THE AZIMUTH BEAM, and loose your target.

So only the boresight, and not whole scaning area, go down 3 degrees? Now it makes sence.

Edit: Wait, now I confused myself.

Edit2: Ok, I got it now!
p.s. Its fun arguing with myself.

Please, check 24 page of the manual. It says that receiving antenas for "Podsvetka" (and for "Wide beam")for the missile and the target are P-12V and P-11V... When we are trackin' jamming target, we use only receiving antenas {and P-16, of course), right? So, I still don't understand...

Please, explain to us... Is it because of 0 elevation lock?

Sorry...

It was "Rabota po ADA" on the switch of fuse settings....

Ok, this is how I see it:
Boresight is a direction, a line, from the antenna where the signal (reception) is strongest (That is the optical axis of the antenna. Further you get from the boresight, weaker the signal will be). In wide mode when you lower the boresight -3 degrees, reception from above the boresight is still good enough to detect a target. But in narrow mode, beam is narrower (of course) so now when you lower the boresight -3 degrees 'top most part' of the beam, capable of detecting targets, is about 2 degrees under the horizon.
Ive included my own picture, RED - boresight, Green - target, BLACK lines - beam width. This is how I think this is happening, if I am wrong Hpasp will surely try to correct me.



p.s. It would be alot easier to explain in person, as Hpasp said, because of all the hand-waving and face-making you can do.
p.p.s. Oh, and the shape of the beam is not exactly a triangle, it is more of a ellipse. This might clarify my post a bit.

Hmmm...
... than the manual is wrong.

Wide Beam
Target - P11V,P12V
Missiles - P11V,P12V

Narrow Beam
Target - P13V,P14V
Missiles - P11V,P12V

Podsvet
Target - P13V,P14V for emit, and P11V,P12V for receive
Missiles - P11V,P12V

Boresight is a direction, a line, from the antenna where the signal (reception) is strongest (That is the optical axis of the antenna. Further you get from the boresight, weaker the signal will be).

No.
Boresight is the line, where the system is guiding the missiles.


Both screens are for elevation (Epsilon).
Left is normal mode, right is H<5.

On the right side, with H<5, the boresight of the system (where it aims) is moved 3 degree down from the center of the antenna beam.
Now, you can aim at -3degree while the system is locked down at 0 degree in elevation, and also the clutter is less in the Azimuth screen.

Am I confusing enough?

Its against spy balloons, used in the '50s.

T/T method with RAB.OT.VM. arming (just after launch) is good against jamming targets, unless...
... target is flying low, and the armed radio prxy fuse is confused by the signals from the ground.

or

Above Hanoi, the USAF had the nasty habit of laying chaff corridor under the jamming B52's.
If you would launch with T/T RAB.OT.VM, than the missile would pop off when it reaches the chaff corridor.

This is when the I87-T/T comes to play, as it calculates an approximate jamming target distance, so the proxy fuse is not armed, until flies above the chaff corridor.

I think you wrote the same... Or I've just missed the point...

No! As I thought... The maximum of the diagram of emition is pointed at least 3 degrees above the ground (i.e. ground clutters) and we have clear picture on the screen, but missile is aiming a bit lower.... So we have 0 degree target with 3 degree antena elevation. Did I get it right??? And that's why we can shoot from sea cleaf against a ship on sea level

1. Did you simulate chafs?
2. When I am trackin' target with I87-T/T, with auto traking on elevation and altitude, this gadget calculates impact points, and shows me a distance boresight, which is approaching, or going away... As I understand, after choosing the elevation (or distance), it calculates the impact point, and due to changing the elevation and azimuth of jamming, it recalculates distance or height and new impact point....( this is what I observed during simulations ) Did I got it right???
3. Is it real, to change input data in I87-T/T, after locking the target on elev. and azimuth? Or in case after I've just launched the missile?

1, Yes, over Hanoi during the B52 raid.


2, Correct.
Just important to know, that the I87V/TT works assuming that the target does not change its altitude!
It is good against B52's, but goes crazy against nimble fighters.

3, Yes, as it does not change the intended flightpath of the missile.
It just change the point where the radio proxy fuse arm.
You are encouraged to update the I87V altitude data, as frequently as you got it from the plotting chart.

During the current MAKS-2011 air-show, there were an important development about the future of Russian SAM systems...

The Almaz design bureau, responsible for the current [S-300PT/PS/PMU (SA-10), S-300PM/PMU1/PMU2 (SA-20), S-400 (SA-21)] systems, took over the Antey design bureau, responsible for the [S-300V (SA-12), S-300VM (SA-23)].
The name of the new design bureau is Almaz-Antey.


The Almaz OKB, historically responsible for the S-25/S-75/S-125/S-200/S-300P/S-400 (SA-1/2/3/5/10/20/21) designs, managed the end of the Cold War in better (financial) shape.
The export successes (China, Cyprus, Vietnam, Algeria) of the S-300PMU1/PMU2 (SA-20) design, and the ongoing S-400 (SA-21) fielding in Russia created a solid financial background.

Meanwhile the Antej S-300V/VM (SA-12/23) systems lack of export, and the shrinking Russian army's lack of cash, leaded the bureau towards bankruptcy.

So the NEXT BIG THING the S-500 (S-400M) Triumph-M system will merge the four-hundred system capabilities (250km range against aerial targets), with the Antej pearls, its ABM capabilities (40km range against MRBMs [2500km medium range ballistic missiles]).

S-400 Triumph (SA-21) launcher


9M82 ABM missile of the Antej's S-300VM (SA-23) system


S-500 (S-400M) Triumph-M launcher with the Antey's ABM missile.

2, Correct.
Just important to know, that the I87V/TT works assuming that the target does not change its altitude!
It is good against B52's, but goes crazy against nimble fighters.[/quote]

Yes, I've noticed that... Now I understand the reason why it happens...




OK, but is that have an efect after the missile is launched???? Maybe not, because as you previosly wrote, the fuse setting can be changed only before launching the missile. Please confirm...