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#4338737 - 02/19/17 08:08 AM Re: SAMSIM ANNOUNCEMENTS ***** [Re: Hpasp]  
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Hpasp Offline
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RANRAP


Angle Deception Jamming


Hpasp
Free SAM Simulator, "Realistic to the Switch"

(U-2 over Sverdlovsk, B-52's over Hanoi, F-4 Phantoms over the Sinai, F-16's and the F-117A Stealth bomber over the Balkans.)
http://sites.google.com/site/samsimulator1972/home

Book from the author - Soviet Nuclear Weapons in Hungary 1961-1991
https://sites.google.com/view/nuclear-weapons-in-hungary/

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Inline advert (2nd and 3rd post)

#4338833 - 02/19/17 10:54 PM Re: SAMSIM ANNOUNCEMENTS [Re: Hpasp]  
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farokh Offline
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I-RAN
I would like ti know
If u add some new jam methods in planes
We must use tt mode against targets? Or we will se another option to do it ?
Ps: is it possible to do more realistic texture and details on karat during missile flight,?

#4338874 - 02/20/17 08:10 AM Re: SAMSIM ANNOUNCEMENTS [Re: Hpasp]  
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Different jamming methods, different techniques to fight against it in different SAM systems.
SAMSIM is realistic to the switch (not to Karat).
cowboy

Last edited by Hpasp; 02/20/17 08:11 AM.

Hpasp
Free SAM Simulator, "Realistic to the Switch"

(U-2 over Sverdlovsk, B-52's over Hanoi, F-4 Phantoms over the Sinai, F-16's and the F-117A Stealth bomber over the Balkans.)
http://sites.google.com/site/samsimulator1972/home

Book from the author - Soviet Nuclear Weapons in Hungary 1961-1991
https://sites.google.com/view/nuclear-weapons-in-hungary/

thumbsup
#4338937 - 02/20/17 03:58 PM Re: SAMSIM ANNOUNCEMENTS [Re: Hpasp]  
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Jonas85 Offline
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Interesting.

In book on the Soviet SAM tactics in Vietnam, they describe the following methods to counter these deception techniques by S-75 operators:

RANRAP:
Early self-protection jammers needed a 4 second delay to tune-in in the signal PRF. This could be exploited in two ways:
1) cycle 75km/150km switch: false targets jump in range, while true target remains on the same range mark.
2) turn ant/ekv off/on: true target dissapears, while false targets remain.
3) IIRC, S-75 also had a variable PRF ("Peremennaja Chastotota") mode, which could make false targets drift in range and that would be noticed by operators.
4) If everything else fails: an experienced operator can distinguish true/false targets by their form, intensity and any present artifacts (target marks of sharper squared shapes and different thickness); true target becomes brighter than false targets on approach, or will fade faster on receding than the false imitations).

ANGLE JAMMING:
1) for early generation Dvina and Volkhov, there was no technical method to counter angle jamming, except to use manual guidance. The closer is the target, the smaller is the tracking error due to the better return vs noise ration. My guess would be ~15km is a burn-through range, approaching/receding target with P=0 were angle jammer completely loses any effectiveness (warning: I did no calculations though)...
2) Volkhov had LORO mode, which made it much less susceptible to angle jamming because the scan rate information was no longer available: without giving the attacker scan frequency ant main beam time on target, the angle tracking error is reduced.
3) In later generation S-75 Volkhov and S-125 Neva, the GshV and GshN modes were introduced. It provided the filtering of angle jamming and sidelobe blanking, reducing angle errors further or negating it completely at much longer ranges.
Unfortunately, GSh modes were implemented in a very cheap way, and they were NOT compatible with SDC against low flying targets or targets in chaff clouds... Only S-25 Berkut defending Moscow had a fully capable and more expensive GSh system.

RANGE-GATE PULL OFF:
1) Early gen. systems: manual tracking in range.
2) In GshV and GshN modes, S-75 and S-125 had a built-in capability to track on leading edge only in range (I've seen this mentioned a couple of times in GShN and GShV design and field test bulletins).

#4338980 - 02/20/17 06:52 PM Re: SAMSIM ANNOUNCEMENTS [Re: Hpasp]  
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Jonas85 Offline
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Some further interesting info about USN F-4 deception jammers and their capabilities that were available 60's and early 70's The Phantom Phacts: EW with more detailed descriptions of AN/ALQ-51,-51A,-100 and AN/ALQ-126 pods.

#4340110 - 02/24/17 06:30 PM Re: SAMSIM ANNOUNCEMENTS [Re: Jonas85]  
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Hpasp Offline
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Some educated comments...

RANRAP:
Early self-protection jammers needed a 4 second delay to tune-in in the signal PRF. This could be exploited in two ways:
1) cycle 75km/150km switch: false targets jump in range, while true target remains on the same range mark.
2) turn ant/ekv off/on: true target dissapears, while false targets remain.


Early AN/ALQ-131 jammers used VHSIC - Very High Speed Integrated Circuits, basically a digital processor with 1MHz frequency (cutting edge technology during the 70's)...
... our adversary will have much better ones, so the techniques mentioned above, will simply not work.
neaner

3) IIRC, S-75 also had a variable PRF ("Peremennaja Chastotota") mode, which could make false targets drift in range and that would be noticed by operators.

Peremennaja Chastotota is actually modelled in SAMSIM, but it would not help against RANRAP, for similar reasons, mentioned above...
biggrin

ANGLE JAMMING:
3) In later generation S-75 Volkhov and S-125 Neva, the GshV and GshN modes were introduced. It provided the filtering of angle jamming and sidelobe blanking, reducing angle errors further or negating it completely at much longer ranges.
Unfortunately, GSh modes were implemented in a very cheap way, and they were NOT compatible with SDC against low flying targets or targets in chaff clouds...


Hmmm...
... SDC works by amplitude subtraction of consecutive reflections, while the GShV is based on the logarithmic subtraction of the signal received by two antenna systems.
I cannot see, how could this task be done in an expensive way, thus GShV + SDC could work in parallel.
sicko

RANGE-GATE PULL OFF:
2) In GshV and GshN modes, S-75 and S-125 had a built-in capability to track on leading edge only in range (I've seen this mentioned a couple of times in GShN and GShV design and field test bulletins).


False target is introduced a before the real target, before it is pulled off...

Attached Files RGPO.jpg
Last edited by Hpasp; 02/24/17 06:30 PM.

Hpasp
Free SAM Simulator, "Realistic to the Switch"

(U-2 over Sverdlovsk, B-52's over Hanoi, F-4 Phantoms over the Sinai, F-16's and the F-117A Stealth bomber over the Balkans.)
http://sites.google.com/site/samsimulator1972/home

Book from the author - Soviet Nuclear Weapons in Hungary 1961-1991
https://sites.google.com/view/nuclear-weapons-in-hungary/

thumbsup
#4340125 - 02/24/17 07:42 PM Re: SAMSIM ANNOUNCEMENTS [Re: Hpasp]  
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Hpasp Offline
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One Minute to Midnight...

"Operation Anadyr" was the code name used by the Soviet Union in 1962 deploying an army group to Cuba to prevent an invasion of the island by the United States.
The plan deployed approximately 60,000 personnel in support of the main missile force, which consisted of three R-12 medium-range (2000km) missile regiments and two R-14 intermediate-range (3700km) missile regiments; each regiment equipped with eight launchers and 12 nuclear (Megaton) armed missiles.
Two regiments (561st and 584th) of 150km ranged FKR-1 cruise missiles equipped with 16 launchers and 80 fourteen kiloton warheads — one to attack the American base at Guantanamo with the second positioned near Havana to destroy any units attempting landings.
32nd Guards Fighter Aviation Regiment equipped with 40 MiG-21s, from the Kubinka air base operated from Santa Clara.
Six Il-28 medium ranged (2000km) bombers with a total of six 407H nuclear bombs at San Julian.
Four motorized rifle regiments, each with its own tank battalion, supported by three Luna short-range ballistic missile battalions equipped with a total of twelve 3N14 nuclear warheads.
A brigade of twelve missile boats.
Two SAM divisions (12th, and 27th) consisting three regiments each (four systems per regiment), with a total of 24 S-75 complexes.


By early August 1962, CIA analysts had noted a substantial increase in Soviet arms deliveries to Cuba during the preceding weeks.
The first U-2 overflight in August, mission 3086 on the 5th, flew too soon to detect the Soviet construction program just getting under way at various sites in Cuba.
Second mission 3088 was postponed until 29 August, due bad weather. This mission’s photography provided the first hard evidence of the nature of the Soviet buildup in Cuba.
Two days after this mission, the CIA reported to the President that there were at least eight surface-to-air missile (SA-2) sites in the western half of Cuba.
Bad weather continued to rule out missions until 26 September, when mission 3093 covered eastern Cuba and found three additional SAM sites.
Three days later mission 3095 flew over the Isle of Pines and Bay of Pigs area, finding one more SAM site and a coastal-defense cruise missile site.
In early October two peripheral missions—3098 along the southeastern coast on 5 October and 3100 along the northern coast on 7 October discovered an additional five SAM sites.
This brought the total to 19, but there was still no evidence of surface-to-surface missiles.
By Sunday, 14 October 1962, the weather over Cuba had cleared, and the first SAC overflight mission 3101 of the island took place. When the U-2 returned, its film was rushed to the National Photographic Interpretation Center. By the evening of 15 October, photo interpreters had found evidence of the presence of MRBMs in the San Cristobal area.
On 27 October, mission 3128 one of the U-2Cs lent by the Agency to the Air Force was shot down over Eastern Cuba, killing the pilot. Maj. Rudolph Anderson causing the height of the missile crisis.

Attached Files cuba.jpg

Hpasp
Free SAM Simulator, "Realistic to the Switch"

(U-2 over Sverdlovsk, B-52's over Hanoi, F-4 Phantoms over the Sinai, F-16's and the F-117A Stealth bomber over the Balkans.)
http://sites.google.com/site/samsimulator1972/home

Book from the author - Soviet Nuclear Weapons in Hungary 1961-1991
https://sites.google.com/view/nuclear-weapons-in-hungary/

thumbsup
#4340129 - 02/24/17 07:54 PM Re: SAMSIM ANNOUNCEMENTS [Re: Hpasp]  
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Hpasp Offline
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Reading JFK speech, announcing the break out of Worl War-III, is chilling.
"Just one minute before midnight"

https://nuclearrisk.files.wordpress.com/2012/11/jfk-airstrike-speech-for-blog1.pdf


Hpasp
Free SAM Simulator, "Realistic to the Switch"

(U-2 over Sverdlovsk, B-52's over Hanoi, F-4 Phantoms over the Sinai, F-16's and the F-117A Stealth bomber over the Balkans.)
http://sites.google.com/site/samsimulator1972/home

Book from the author - Soviet Nuclear Weapons in Hungary 1961-1991
https://sites.google.com/view/nuclear-weapons-in-hungary/

thumbsup
#4340175 - 02/24/17 10:39 PM Re: SAMSIM ANNOUNCEMENTS [Re: Hpasp]  
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piston79 Offline
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Originally Posted by Hpasp
Some educated comments...


May the jamming environment be optional (as non-historical missions, invulnerable mode etc.), or it is too difficult to program it in such a way?

Last edited by piston79; 02/24/17 10:41 PM.
#4340278 - 02/25/17 03:31 PM Re: SAMSIM ANNOUNCEMENTS [Re: piston79]  
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Hpasp Offline
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Advanced jamming will be available at the Ashuluk firing range only.


Hpasp
Free SAM Simulator, "Realistic to the Switch"

(U-2 over Sverdlovsk, B-52's over Hanoi, F-4 Phantoms over the Sinai, F-16's and the F-117A Stealth bomber over the Balkans.)
http://sites.google.com/site/samsimulator1972/home

Book from the author - Soviet Nuclear Weapons in Hungary 1961-1991
https://sites.google.com/view/nuclear-weapons-in-hungary/

thumbsup
#4340438 - 02/26/17 02:17 PM Re: SAMSIM ANNOUNCEMENTS [Re: Hpasp]  
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Hpasp Offline
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Hungary, Europe
SAMSIM Version:0.930 is released

Beside Noise Jamming, several Deception Jamming methods are available in Ashuluk :
- RGPO (Range Gate Pull Off)
- RANRAP (Random Range Program)
- Angle Deception Jamming

New Situation about the Cuban Missile Crisis (Operation Anadyr)

http://sites.google.com/site/samsimulator1972/
thumbsup


Hpasp
Free SAM Simulator, "Realistic to the Switch"

(U-2 over Sverdlovsk, B-52's over Hanoi, F-4 Phantoms over the Sinai, F-16's and the F-117A Stealth bomber over the Balkans.)
http://sites.google.com/site/samsimulator1972/home

Book from the author - Soviet Nuclear Weapons in Hungary 1961-1991
https://sites.google.com/view/nuclear-weapons-in-hungary/

thumbsup
#4340509 - 02/26/17 08:27 PM Re: SAMSIM ANNOUNCEMENTS [Re: Hpasp]  
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Muggs Offline
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Hpasp, really great your still improving this! Thanks.

#4341389 - 03/01/17 10:16 PM Re: SAMSIM ANNOUNCEMENTS [Re: Hpasp]  
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PN79 Offline
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Thank you!

#4341497 - 03/02/17 03:03 PM Re: SAMSIM ANNOUNCEMENTS [Re: Hpasp]  
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Jonas85 Offline
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Great job, Hpasp! I'll try new ECM effects later today.

Were the docs also updated? Do I need to re-download manual PDFs?

Hpasp, could you move my previous post on ECCM and your response to the EW thread so we can continue the discussion there?..

#4341509 - 03/02/17 03:44 PM Re: SAMSIM ANNOUNCEMENTS [Re: Jonas85]  
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piston79 Offline
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Originally Posted by Jonas85


Were the docs also updated? Do I need to re-download manual PDFs?




I think you could add an ECM advanced manual to documentation.... thumbsup

#4341759 - 03/03/17 02:49 PM Re: SAMSIM ANNOUNCEMENTS [Re: Hpasp]  
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Vaderini Offline
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Excellent work Hpasp!

Do you have a PayPal account so I can donate some money?

#4439824 - 09/20/18 03:45 AM Re: SAMSIM ANNOUNCEMENTS [Re: Hpasp]  
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farokh Offline
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I-RAN
Hey dear hpasp , as u remember I'm the badass Persian samsim lover from 2009 till now
I was the oldest your fan and I'm still .....
It's up to you to take a decision about samsim future
But remember ,,, you didn't simulate the sa6
I can't believe samsim has been finished ,,, cause I can't stop thinking about How KUB works
So ,,, put the last bullet in your samsim revolver and take aim on me .

#4440154 - 09/21/18 08:32 PM Re: SAMSIM ANNOUNCEMENTS [Re: Hpasp]  
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piston79 Offline
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Hpasp don't give a sh*t about this project anymore...

#4447471 - 11/07/18 10:17 PM Re: SAMSIM ANNOUNCEMENTS [Re: Jonas85]  
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piston79 Offline
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Originally Posted by Jonas85
Great job, Hpasp! I'll try new ECM effects later today.

Were the docs also updated? Do I need to re-download manual PDFs?

Hpasp, could you move my previous post on ECCM and your response to the EW thread so we can continue the discussion there?..


Jonas85, what's with the ECM, GshV and GshN modes etc.?

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