I'm using Windows XP with SAMSIM version 0.926C

Ok I spent quite a bit of time testing and observing the SA-2F at the Asuluk range against the very low flying high speed FB-111 and here is what I have found.

Asuluk range parameters:
Missiles = 6 x V750VU 11DU
Targets = 3 x RM-207M (Simulating FB-111s) launched at 1 minute intervals starting at T+00min 10sec
dm, m jamming = none
cm jamming = none

This image shows my I-64 (Q - button) set-up.



This image shows my I-62 (Z - button) set-up.

NOTE:
Because I'm engaging a target flying below 300m, the K3 I, II & III red lights are illuminated signifying that the radio proximity fuse for all three missile channels has been switched OFF. Leaving the radio fuses on (K3 I, II & III lights off), is supposed to confuse the missiles radio fuse as it will be flying close to the ground and most likely interference from ground clutter would cause a premature detonation.


This images shows a typical missile flyout with 'K' guidance (Half Lead Elevated By Constants), with the red K3 lights.

NOTE:
Missile launch is at 30Km, the missiles will always initially stabilise at 3.5 to 4 degrees to the right of the radar beam, as indicated on the azimuth (Beta) display. The 3 green lamps, elevation, range and azimuth signify that auto-tracking has been initiated in all 3 dimensions.


The following two images show the missile at 'end-game'.


NOTE:
The missile begins it's end-game intercept turn towards the target very late and as a result misses. This occurs about 90% of the time.
Regardless of target azimuth motion observed on the azimuth screen and the right PAA dial (black three pronged pointer), the missiles always fly to the right of the radar beam by approximately 3.5 to 4 degrees. This occurs even if the target is moving to the left, which means the missile is not leading the target in azimuth.



The following test is exactly the same as the above, but in this instance the K3 I, II & III radio fuse lamps are off indicating that the radio fuses on all three missile channels have been switched ON.

This image was taken a few seconds after missile launch, which occurred at 30Km.

NOTE:
On this occasion the target was flying to the left which was indicated on the azimuth display and right hand PAA dial. As can be seen the missile is leading the target by flying to the left of the radar beam. Had the target been flying to the right, the missile would lead it to the right as other tests have shown. This is not the case with the radio fuse inactive (K3 red lights ON).


This images shows the missile continuing it's fly-out and still leading the target.

NOTE:
The movement of the ground clutter to the right and the slight change of the right PAA indicator (showing 45 degrees whereas it was almost 50 degrees in the previous image above this one), illustrates the target is moving to the left.


This images shows the missile a few moments before impact. Again note the ground clutter and right PAA indicator.



This images shows the target and missile just after impact. The target was killed.

NOTE:
With the radio fuse ON (red K3 lamps OFF), 'K' guidance mode has a pK of 1.0!!!


Using 'YNP' guidance (Half-Lead) with the radio fuse ON, there is a chance the missile will 'disappear' a couple of seconds after launch (perhaps being lead into the ground by the target losing altitude). If the missile survives the first couple of seconds, it will lead the target correctly and score a kill.
Using 'YNP' guidance with the radio fuse OFF, there is a chance the missile will 'disappear' a couple of seconds after launch (perhaps being lead into the ground by the target losing altitude). If the missile survives the first couple of seconds, it will fly with a profile very similar to the images posted of 'K' guidance with radio fuse OFF. So it will always fly to the right of the radar beam and will not lead the target correctly. The chances of scoring a kill are extremely low.

Using T/T guidance (Three-Point) with or without selecting the missile radio fuse has exactly the same effect as 'K' guidance with the radio fuse on, with the exception that the missile will fly directly line of sight on the radar beam to the target. Pk is 1.0!!! This is the most effective mode.


1) So from all of these observations and comparisons we can see that switching the missiles radio fuse OFF (red K3 lamps on) is altering the flight profile of the missiles when used in conjunction with the 'K' and 'YNP' guidance modes.

2) Ground clutter has no effect on the radio fuse regardless of target altitude.

3) Missile pK seems to be far too high, against a high speed low altitude target.

A few other points:
a) Pausing the simulation doesn't pause the missiles gyro, so if you pause the sim just after selecting the 'prepare missile for launch' knob on the I-64 (Q - button) panel, after around 30 seconds (with the sim still paused) the missiles ready lamp on the I-62 (Z - panel) will illuminate.

b) The missiles appear to detonate at the range line on the elevation and azimuth scopes with the radio fuse ON, if auto-tracking is deselected in range and the range line moved downwards (closer in range than the target). If the range line is move upwards (further in range that the target), the missile will not detonate at the range line, but will pass it and disappear after a few seconds of flight.
Considering the missiles are flying with active radio fuses, their proximity to the ground or a target should cause detonation, not their proximity to the range line.

c) Ground clutter doesn't seem to have an effect on target tracking. Ground clutter can make it more difficult for the user to separate a target from the background, but not the radar. If the user by chance happens to have the elevation, range or azimuth lines on a target deep behind clutter, auto-tracking can begin. Ground clutter also doesn't cause a loss of of auto-tracking (break lock).

d) 'T/T' guidance mode seems to be far too effective.

Cheers