That would imply, the rocket actually exploded above and ahead of the aircraft, while all graphics shown so far seem to show an explosion in line of the approach from below (probably making use of the momentum the warhead already has approaching at supersonic speed).
It is quite possible that the missile did intercept the aircraft from above. Most Medium Range SAM is this day and age do not fly directly towards the target from launch in the case of a long range engagement, but will fly a programmed trajectory in altitude that gets the missile to a high altitude as quickly as possible, thus reducing drag and increasing range. The missile will also either fly to a pre-programmed point in the air via use of an autopilot (with a datalink to change that point in flight if required) or track and follow the target in azimuth only. If the later, the missile's proportional navigation system will be set to a reduced maneuver mode to reduce the amount of missile maneuvering which will have to do for the majority of its flight. Both of these mid course modes again reduces drag and increases missile range. At a certain point of the missile flying it will get a command from the ground to go into terminal homing and it will steer towards the target in both pitch and yaw in a lead intercept course with no limits on the Proportional Navigation 'k' factor (which means that the missile is aiming at a point around 5 to 6 degrees in front of the missile seeker sight line on the target in the direction of target movement).
An IFF system maybe fitted to the SA-11, but without the codebook for the returns from aircraft, a totally pointless system as far as the rebels go, plus the IFF system fitted to Soviet systems was not compatible with western IFF/SSR systems which may be the case with this system (The IFF systems on earlier Soviet SAMs definitely weren't).
They may had had the camera system on the missile launcher, but if its cloudy that isn't much use for identifying the target either.